SOW 2.1 Radiological Detection System Base Unit to Legacy Probe Interface Technical Specification Rev C.pdf

Orbis, Inc.

RADIAC ISEA

Document No. Revision

RE-TS-0002 C

Radiological Detection System Base Unit to Legacy Probe Interface Technical Specification

Preparer: Tyler Artz

Name Signature & Date

Reviewer: Jim Reynolds

Name Signature & Date

RE-TS-0002, Rev. C Page 2 of 13

Revision Log

Rev.

Date

(mm/dd/yy) Description of Changes

A 6/24/21 Initial release.

B 4/12/23 Incorporated NAVSEA 09RD comments submitted via 23_020 09RD1 of 26 JAN 23.

C 1/4/24 Incorporated NAVSEA 09RD comments submitted via 23_228 09RD of

4 DEC 23.

RE-TS-0002, Rev. C Page 3 of 13

Table of Contents

1 SCOPE

1.1 PURPOSE

1.2 INTRODUCTION

2 APPLICABLE DOCUMENTS

3 REQUIREMENTS

3.1 WEIGHT & DIMENSIONS

3.2 POWER

3.3 HUMAN FACTORS

3.4 SYSTEM DISPLAY

3.5 DETECTION CAPABILITIES

3.6 CALIBRATION

3.7 ENVIRONMENTAL CONDITIONS

3.8 SAFETY

3.9 NAMEPLATES AND PRODUCT MARKING

3.10 RADIOACTIVE SOURCES

3.11 MAINTAINABILITY

4 VERIFICATION

4.1 WEIGHT & DIMENSIONS

4.2 POWER

4.3 HUMAN FACTORS

4.4 SYSTEM DISPLAY

4.5 DETECTION CAPABILITIES

4.6 CALIBRATION

4.7 ENVIRONMENTAL CONDITIONS

4.8 SAFETY

4.9 NAMEPLATSES AND PRODUCT MARKING

4.10 RADIOACTIVE SOURCES

4.11 MAINTAINABILITY

5 PACKAGING

RE-TS-0002, Rev. C Page 4 of 13

1 SCOPE

1.1 PURPOSE

This specification defines the technical requirements and test methodologies for the

Radiological Detection System (RDS) Base Unit to Legacy Probe Interface, herein referred to as “the interface.” The purpose of this interface is to enable use of the DT- 304/PDR and DT-643( )/PDR Beta Frisker Probes with the RDS Base Unit as an alternative to the RDS Small-Area Beta/Gamma (SABG) Contamination Probe.

1.2 INTRODUCTION

The Navy currently utilizes the shielded DT-304/PDR, connected to an IM-265/PDQ

RADIAC Meter via a DT-685/PDQ Beta Probe Interface or connected directly to an IM- 271/PD Frisker Station, to frisk for beta contamination. For surveys performed in areas with lower background levels, the Navy uses the unshielded DT-643( )/PDR. It is necessary to connect this probe to an IM-265/PDQ or IM-271/PD in the same fashion as the DT-304/PDR. The Radiological Detection System (RDS) Base Unit will replace the IM-265/PDQ and IM-271/PD for all applicable Navy end uses. There is not currently a direct equivalent to the DT-304/PDR offered within the RDS suite. The Small-Area Beta/Gamma (SABG) Contamination Probe, which is the primary solution provided by the RDS for surveying for beta contamination, does not normally come with a shield.

This makes the SABG more akin to the unshielded DT-643( )/PDR. An optional aluminum-clad lead shield is available for purchase with the SABG that would make the probe equivalent to the DT-304/PDR. However, the NAVSEA RADIAC Program has determined that it is significantly more cost-effective to design and build an interface between the RDS Base Unit and the DT-304/PDR. The interface will utilize existing SABG technology and firmware to the maximum extent possible, but meet a new form factor. This interface will also allow the DT-643( )/PDR to be compatible with the RDS Base Unit as it uses the same high voltage circuitry and pancake GM tube as the DT-

304/PDR.

2 APPLICABLE DOCUMENTS

ANSI/ASQ Z1.4-2003; Sampling Procedures and Tables for Inspection Attributes (2003)

ANSI/ESD S20.20-2021; Protection of Electrical and Electronic Parts, Assemblies and

Equipment (Excluding Electrically Initiated Explosive Devices) (1 Mar 2007)

MIL-DTL-901E; Shock Tests, H. I. (High-Impact) Shipboard Machinery, Equipment, and Systems, Requirements for (20 JUN 2017)

MIL-HDBK-454C; General Guidelines for Electronic Equipment (21 SEP 2021)

RE-TS-0002, Rev. C Page 5 of 13

MIL-STD-108E; Definitions of and Basic Requirements for Electric and Electronic Equipment (4 AUG 1966)

MIL-STD-130N; Identification Marking of U.S. Military Property (17 DEC 2007)

MIL-STD-167-1A; Mechanical Vibrations of Shipboard Equipment (Type I –

Environmental and Type II – Internally Excited) (2 NOV 2005)

MIL-STD-461G; Requirements for the Control of Electromagnetic Interference

Characteristics of Subsystems and Equipment (11 DEC 2015)

MIL-STD-810H; Environmental Engineering Considerations and Laboratory Tests (19

JAN 2019)

3 REQUIREMENTS

The interface shall conform to the requirements listed in this section and shall be verified in accordance with Section 4 of this document.

3.1 WEIGHT & DIMENSIONS

3.1.1 The interface shall weigh no more than 1.0 lb.

3.2 POWER

3.2.1 The interface shall be powered by the RDS Base Unit and provide high voltage (900V ±

50V) to the DT-304/PDR or DT-643( )/PDR.

3.2.2 Any external cables carrying high voltage shall be of the shortest length practical and shall not exceed 12.0 inches in length.

3.2.3 With the interface and DT-304/PDR or DT-643( )/PDR connected, the RDS Base Unit shall provide continuous operation for at least 8 hours.

3.2.4 The interface shall connect to the RDS Base Unit via the RDS Common Probe Cable.

The RDS Common Probe Cable may be molded to the interface.

3.3 HUMAN FACTORS

3.3.1 A method for restraining cables shall be available to prevent snag hazards during normal use.

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3.3.2 Users shall be able to perform all functional operations, including any maintenance, while wearing Occupational Safety and Health Administration (OSHA) Level A or Mission Oriented Protective Posture (MOPP) Level IV Personal Protective Equipment.

3.3.3 Mechanically connecting an interface to an RDS Base Unit or disconnecting an interface from an RDS Base Unit shall be accomplishable within 10 seconds and shall involve no more than two connectors.

3.4 SYSTEM DISPLAY

3.4.1 With the interface and DT-304/PDR or DT-643( )/PDR connected, the RDS Base Unit shall recognize this combination as an RDS SABG Probe and display the SABG Probe icon in the upper-right portion of the Liquid-Crystal Display (LCD).

3.5 DETECTION CAPABILITIES

3.5.1 With the interface and DT-304/PDR or DT-643( )/PDR connected, the RDS Base Unit shall be capable of displaying readings of count rate (cpm, cps) and count rate per unit area (cpm/cm2, cps/cm2).

3.5.2 Any RDS Base Unit detection data set taken when using the interface connected to the

DT-304/PDR or DT-643( )/PDR shall have a coefficient of variation ≤ 15%. A detection data set consists of at least six (6) readings under identical operational and environmental conditions. This requirement does not apply where statistically impractical.

3.5.3 The RDS Base Unit, with the DT-304/PDR or DT-643( )/PDR connected via the interface, shall indicate no rise in radiation rate due to exposure to a light intensity of 10,000 foot candles on the probe detection surface.

3.5.4 The DT-304/PDR or DT-643( )/PDR, when connected to the RDS Base Unit via the interface, shall meet or exceed the 4π efficiencies identified in Table 3-1.

Table 3-1. Beta Efficiencies (with Protective Grid)

Isotope 4π Efficiency* 137Cs 22% 60Co 16%

90Sr, 90Y 32% 99Tc 15% 14C 6%

*Efficiencies listed as percentage of 4π emission rate, from a 2-inch diameter circular area of a 100 cm2 square source for 137Cs and 60Co sources. Efficiencies listed as a percentage of 4π emission rate, from a 1.75-inch diameter source for other isotopes.

Open area of the DT-304/PDR and DT-643( )/PDR etched stainless steel protective grids is 79%.

RE-TS-0002, Rev. C Page 7 of 13

3.5.5 The DT-304/PDR or DT-643( )/PDR beta energy range for detection while connected to the RDS Base Unit via the interface shall encompass at least 100 keV through 5 MeV.

3.5.6 The DT-304/PDR or DT-643( )/PDR, when connected to the RDS Base Unit via the interface, shall produce a display range encompassing at least 1.5 million cpm.

3.5.7 Background shall not contribute to a change in response (see 3.5.4) by more than 10%.

3.5.8 While in normal operation, the DT-304/PDR or DT-643( )/PDR, connected to the RDS

Base Unit via the interface, shall be capable of responding to a step function change in field intensity to within ± 10% of the final expected count rate, R, or 𝟑 √𝑹∗𝑻 𝑻 of R, where T is the allowed response time. This requirement does not apply where the lower 3-sigma value of the counts expected within the response time period 𝑹 ∗ 𝑻 𝟑√𝑹 ∗ 𝑻 is less than the upper 3-sigma value of the expected background counts within the response time period 𝑩 ∗ 𝑻 𝟑√𝑩 ∗ 𝑻 , where B is the expected background count rate.

The ranges are defined as follows, where x is the displayed count rate:

a. 0 < x ≤ 100 cpm Response Time ≤ 30 sec

b. 100 < x ≤ 1000 cpm Response Time ≤ 20 sec

c. 1000 < x ≤ 10000 cpm Response Time ≤ 10 sec

d. 10000 < x ≤ 100000 cpm Response Time ≤ 5 sec

e. x > 100000 cpm Response Time ≤ 2 sec

3.6 CALIBRATION

3.6.1 The interface shall be capable of being calibrated with an MP-1 or MP-2 Mini Pulser (or equivalent) and, with the DT-304/PDR or DT-643( )/PDR connected, verified with a National Institute of Standards and Technology (NIST) traceable 99Tc calibration standard.

3.6.2 Any necessary calibration or adjustment of the interface shall be achievable through the existing RDS calibration software.

3.7 ENVIRONMENTAL CONDITIONS

3.7.1 Temperature – Storage and Transportation. The interface shall operate after exposure to temperatures of -50°C to 60°C. This requirement shall be verified in accordance with

MIL-STD-810H.

3.7.2 Temperature – Operating. The interface shall operate within the temperature range of -

20°C to 50°C. This requirement shall be verified in accordance with MIL-STD-810H.

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3.7.3 Humidity. The interface shall operate within the relative humidity range of 5-95%. This requirement shall be verified in accordance with MIL-STD-810H.

3.7.4 Salt Fog. The interface shall operate and not be damaged as defined in MIL-STD-810H, Method 509.7, Paragraph 2.1.1 after exposure to salt fog.

3.7.5 Fungus. The interface shall not support fungal growth.

3.7.6 Altitude and External Pressure – Storage and Transportation. The interface shall operate after being subjected to pressures associated with 0 – 50,000 foot altitudes above sea level. This requirement shall be verified in accordance with MIL-STD-810H.

3.7.7 Altitude and External Pressure – Operating. The interface shall operate in pressures associated with 0 – 15,000 foot altitudes above sea level and external pressure ranges of

101.3 – 57.2 kPa. This requirement shall be verified in accordance with MIL-STD-810H.

3.7.8 Watertightness. The interface shall be watertight when tested in accordance with the requirements of MIL-STD-108E.

3.7.9 Shock. The interface, when mounted in a transit case, shall be capable of withstanding the Grade A, Type A, Class I shock test of MIL-DTL-901E without degradation.

3.7.10 Vibration. The interface shall meet the operational and transportation vibration requirements of the Type I vibration test of MIL-STD-167-1A.

3.7.11 Electromagnetic Interference (EMI). The interface shall meet all of the following applicable and limited EMI requirements specified in MIL-STD-461G, Table V for Surface Ships, Submarines, Navy Aircraft, and Navy Ground, as applicable: CE101, CE102, CS101, CS114, CS115, CS116, CS118, RE101, RE102, RS103, and RS105.

3.8 SAFETY

3.8.1 The interface shall protect personnel from inadvertent contact with voltages capable of producing shock hazards in accordance with MIL-HDBK-454C, Guideline I, Paragraph 4.5.

3.8.2 The interface shall control and dissipate the build-up of electrostatic discharges to protect personnel from shock hazards and prevent performance degradation or damage to electronics in accordance with ANSI/ESD S20.20-2021.

RE-TS-0002, Rev. C Page 9 of 13

3.9 NAMEPLATES AND PRODUCT MARKING

3.9.1 The interface shall be appropriately identified with separate, unique permanent serial numbers and lot numbers. Where the reliable performance of components may be affected by aging, a means of identifying the serial number and date (at a minimum, the year) of such components shall be given.

3.9.2 The interface shall be marked/labeled in accordance with MIL-STD-130N.

3.10 RADIOACTIVE SOURCES

3.10.1 The interface shall not contain an embedded radioactive source.

3.11 MAINTAINABILITY

3.11.1 Components internal to the interface shall be accessible for depot-level repair.

4 VERIFICATION

This section summarizes all inspections and tests to be performed to determine if the vendor-developed products offered for acceptance conform to all requirements in Section 3 of this specification.

4.1 WEIGHT & DIMENSIONS

4.1.1 Weigh the interface to verify its weight does not exceed 1.0 lb.

4.2 POWER

4.2.1 Operate the system to verify that the RDS Base Unit powers the interface and the interface provides high voltage (900V ± 50V) to the DT-304/PDR or DT-643( )/PDR.

Verify by test that the interface maintains high voltage provided to the DT-304/PDR or DT-643( )/PDR at 900V ± 50V.

4.2.2 Inspect the system to verify that any high voltage cable runs are 12.0 inches long or less.

4.2.3 Verify by test that the battery life of the RDS Base Unit with the interface and DT-

304/PDR or DT-643( )/PDR connected is at least 8 hours. Test the battery life by energizing systems with a fresh set of batteries and operating until 100% depletion of battery power. Select sample size in accordance with ANSI/ASQ Z1.4. Use multiple sampling plan for normal inspection with an acceptance quality limit of 1.0.

4.2.4 Verify by observation that the interface connects to the RDS Base Unit via an RDS

Common Probe Cable.

RE-TS-0002, Rev. C Page 10 of 13

4.3 HUMAN FACTORS

4.3.1 Inspect the system to verify that a method for restraining cables is available.

4.3.2 Verify by demonstration that a user is able to perform all functional operations, including any maintenance, while wearing Occupational Safety and Health Administration (OSHA) Level A or Mission Oriented Protective Posture (MOPP) Level IV Personal Protective Equipment.

4.3.3 Verify by observation that mechanically connecting an interface to an RDS Base Unit or disconnecting an interface from an RDS Base Unit is accomplishable within 10 seconds and involves no more than two connectors.

4.4 SYSTEM DISPLAY

4.4.1 Verify by observation that the RDS Base Unit displays the SABG Probe in the upper-right portion of the LCD when the DT-304/PDR and DT-643( )/PDR are connected via the interface.

4.5 DETECTION CAPABILITIES

4.5.1 Verify by observation that the RDS Base Unit LCD displays readings of count rate (cpm, cps) and count rate per unit area (cpm/cm2, cps/cm2) when the interface and DT-304/PDR or DT-643( )/PDR are connected.

4.5.2 Verify by analysis that any RDS Base Unit detection data set taken when using the interface connected to the DT-304/PDR or DT-643( )/PDR has a coefficient of variation ≤ 15%. The reproducibility spread shall be calculated for each detection reading and compared to the requirement. This requirement is applicable to the detection readings, not to other characteristics such as the time to respond. The test report for each attribute shall explicitly address whether or not the systems meet this criterion.

4.5.3 Verify by test that the RDS Base Unit, with the DT-304/PDR or DT-643( )/PDR connected via the interface, does not indicate rise in radiation rate due to exposure to a light intensity of 10,000 foot candles on the probe detection surface. Test the probe using a light source to verify no light leaks.

4.5.4 Verify by test or analysis that the DT-304/PDR or DT-643( )/PDR, when connected to the RDS Base Unit via the interface, meets or exceeds the 4π efficiencies identified in Table 3-1. Data from previous testing may be used.

RE-TS-0002, Rev. C Page 11 of 13

4.5.5 Verify by test that the DT-304/PDR or DT-643( )/PDR beta energy range for detection while connected to the RDS Base Unit via the interface encompasses at least 100 keV through 5 MeV. This test shall include a minimum of three (3) different beta energies over the entire beta range (e.g. 14C, 99Tc, 90Sr/90Y, and 106Ru/106Rh or other agreed upon sources).

4.5.6 Verify by demonstration and using appropriate beta sources (e.g. 14C, 99Tc, 90Sr/90Y, and

106Ru/106Rh or other agreed upon sources) that the DT-304/PDR or DT-643( )/PDR, when connected to the RDS Base Unit via the interface, produces a display range encompassing at least 1.5 million cpm.

4.5.7 Verify by test that gamma background does not contribute to a change in overall response by more than 10%. Test by taking background measurements during the testing identified in 4.5.3 and determining the contribution of background to overall response.

4.5.8 Verify by test that while in normal operation, the DT-304/PDR or DT-643( )/PDR, connected to the RDS Base Unit via the interface, is capable of responding to the step function change in field intensity presented in 3.5.8 to within ± 10% of the final value.

At least one (1) count rate in each range listed shall be tested. For the lowest count rate range, verification shall be performed at the greater of approximately 80% of the count rate range or the lowest applicable count rate within the range and use the average of six

(6) trials to evaluate the system’s performance. For all other count rate ranges, test can be conducted everywhere within the range as approved by NAVSEA 09RD.

4.6 CALIBRATION

4.6.1 Verify by demonstration that the interface is capable of being calibrated with an MP-1 or

MP-2 Mini Pulser (or equivalent) and, with the DT-304/PDR or DT-643( )/PDR connected, verified with a National Institute of Standards and Technology (NIST) traceable 99Tc calibration standard.

4.6.2 Verify by demonstration that any necessary calibration or adjustment of the interface is achievable through the existing RDS calibration software.

4.7 ENVIRONMENTAL CONDITIONS

4.7.1 Verify by test that the interface operates after exposure to temperature of -50°C to 60°C.

Conduct high temperature storage test in accordance with MIL-STD-810H, Method 501.7, Procedure I. Store the system at 60°C for 168 hours. Conduct low temperature storage test in accordance with MIL-STD-810H, Method 502.7, Procedure I. Store the system at -50°C for at least 4 hours.

RE-TS-0002, Rev. C Page 12 of 13

4.7.2 Verify by test that the interface operates within the temperature range of -20°C to 50°C.

Conduct high temperature operation test in accordance with MIL-STD-810H, Method 501.7, Procedure II. Operate the system at 50°C for 72 hours. Conduct low temperature operation test in accordance with MIL-STD-810H, Method 502.7, Procedure II. Operate the system at -30°C for at least 4 hours.

4.7.3 Verify by test that the interface operates within the relative humidity range of 5-95%.

Test in accordance with MIL-STD-810H, Method 507.6, Procedure I, except the maximum temperature is 50°C. Expose the system to ten (10) 24-hour temperature-humidity cycles.

4.7.4 Verify by test that the interface operates and is not damaged after exposure to salt fog.

Test in accordance with MIL-STD-810H, Method 509.7, Paragraph 2.1.1. The system shall be exposed to salt fog having a salt solution of 5 ± 1% at 35 ± 2°C with a fallout of 1 to 3 mL/80cm2/hr. The cycle shall be a 24-hour period of salt fog, 24-hour period of drying, two (2) cycles for a total of 96 hours. An alternate exposure shall be 1 cycle of 48-hour salt fog, 48-hour drying.

4.7.5 Verify by analysis that the interface does not support fungal growth. Analyze in accordance with MIL-STD-810H, Method 508.8 and Table 4-1.

Table 4-1. Applicable Fungi.

Test Fungi Aspergillus niger QM 386 ATCC 9642 Aspergillus flavus QM 380 ATCC 9643

Aspergillus versicolor QH 432 ATCC 11730 Penicillium funiculosum QH 474 ATCC 11797 Chaetomium globosum QH 459 ATCC 6205

4.7.6 Verify by test that interface operates after being subjected to pressures associated with 0

– 50,000 ft. altitudes above sea level. Test in accordance with MIL-STD-810H, Method 500.6, Procedure I. The interface shall be exposed to pressures associated with 0 – 50,000 ft. altitudes above sea level. The maximum altitude shall be held for one (1) hour.

The altitude changes shall not exceed 32 ft./s.

4.7.7 Verify by test that the interface operates in pressures associated with 0 – 15,000 ft.

altitudes above sea level and external pressure ranges of 101.3 – 57.2 kPa. Test in accordance with MIL-STD-810H, Method 500.6, Procedure II. The system shall be exposed to pressures associated with 0 – 15,000 ft. (external pressures of 101.3 – 57.2 kPa) altitudes above sea level. The maximum altitude shall be held for one (1) hour. The altitude change shall not exceed 32 ft./s.

4.7.8 Verify by test that the interface is watertight. Test in accordance with MIL-STD-108E.

RE-TS-0002, Rev. C Page 13 of 13

4.7.9 Verify by test that the interface, when mounted in a transit case, is capable of withstanding the Grade A, Type A, Class I shock test of MIL-DTL-901E without degradation.

4.7.10 Verify by test that the interface meets the operational and transportation vibration requirements of the Type I vibration test of MIL-STD-167-1A.

4.7.11 Verify by test that the interface meets all of the following applicable and limited EMI requirements specified in MIL-STD-461G, Table V for Surface Ships, Submarines, Navy Aircraft, and Navy Ground: CE101, CE102, CS101, CS114, CS115, CS116, CS118, RE101, RE102, RS103, and RS105.

4.8 SAFETY

4.8.1 Verify by analysis that the interface protects personnel from inadvertent contact with voltages capable of producing shock hazards in accordance with MIL-HDBK-454B, Paragraph 4.5.

4.8.2 Verify by analysis that the interface controls and dissipates the build-up of electrostatic discharges to protect personnel from shock hazards and prevent performance degradation or damage to electronics in accordance with ANSI/ESD S20.20-2021.

4.9 NAMEPLATSES AND PRODUCT MARKING

4.9.1 Verify by observation that the interface is appropriately identified with separate, unique permanent serial numbers and lot numbers. Verify by observation that a means of identifying the serial number and date (at a minimum, the year) is given for instances where the reliable performance of components are affected by aging.

4.9.2 Verify by observation that the interface is marked/labeled in accordance with MIL-STD-

130N.

4.10 RADIOACTIVE SOURCES

4.10.1 Verify by observation that the interface does not contain an embedded radioactive source.

4.11 MAINTAINABILITY

4.11.1 Verify by demonstration and observation that components internal to the interface are accessible for depot-level repair.

5 PACKAGING

Standard commercial packaging shall be utilized to prevent damage to the interface.