Question and Answer FMP-NNL-0043_Portable Small Article Monitor.pdf
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- Attached to
- Portable Small Article Monitor for Shipboard Use
- Solicitation number
- FMP-NNL-0043
- Issued by
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Department of Energy
About this file
This is a Questions and Answers document addressing clarifications on technical specifications for a Small Article Monitor (SAM) radiation detection system.
The document clarifies four key technical areas. First, regarding radionuclide evaluation, Co-60 is identified as the primary isotope of concern, but Cs-137 may be used as a benchmark if it can be demonstrated to conservatively bound higher gamma energy emitting isotopes. Second, for encapsulation requirements under Technical Specification #21, any hard, durable non-liquid paint coating such as powder coating over lead shielding is acceptable; however, coating on the bottom horizontal surface of the inner cavity is discouraged due to wear and tear. Third, no specific seismic qualifications are provided in the technical specifications, but manufacturers must provide means for end-users to implement 29 CFR 1910.212(b) anchoring requirements for fixed machinery. Fourth, regarding standards compliance, the previously cited IEC 61098 standard was identified as an oversight because it applies to personnel surface contamination monitoring rather than object monitoring. The document corrects this by requiring manufacturers to instead comply with ANSI N323D-2002 American National Standard for Installed Radiation Protection Instrumentation.
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Text version
Q: Tech Spec #6. This spec identifies Co-60 as the radionuclide of concern. Will be the SAM be evaluated using any other radionuclide (e.g., Cs-137).
A: As the primary byproduct during reactor operation, Co-60 is the predominant isotope of concern. However, if an argument can be made that using Cs-137 as a benchmark, given its lower gamma energy, would conservatively bound all other higher gamma energy emitting isotopes (including Co-60), then this would be acceptable.
Q: Tech Spec #21. Please clarify “encapsulated”. If lead shielding is proposed, is a power-coated paint finish over any exposed lead sufficient?
A: Yes, any type of hard, durable non-liquid paint coating such as powder coating would be acceptable. However, the use of a coating on the bottom horizontal surface of the inner cavity is discouraged, due to its increased wear and tear.
Q: Seismic Qualifications. The technical specs do not provide any specific seismic qualifications. Was that an oversight or are those requirements imbedded in a reference document?
A: No Seismic Qualifications are provided. Manufacturer still should provide means for the end-user to successfully implement 29 CFR 1910.212 (b) Anchoring fixed machinery. Machines designed for a fixed location shall be securely anchored to prevent walking or moving.
Q: IEC 61098. The IEC 61098 Standard which is cited it not applicable to object monitors. IEC 61089 is specific to personnel surface contamination monitoring as opposed to object monitoring. Are there certain standards within that document that you want us to apply to the portable small article monitor?
A: It was an oversight by NNL to state an inapplicable standard. Manufacturer should abide instead by ANSI N323D-2002 American National Standard for Installed Radiation Protection Instrumentation.
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