H2O Analysis 109690 11182019.pdf
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- Solicitation number
- 1333ND20QNB610625
About this file
This solicitation seeks maintenance and repair services for cooling towers at the National Institute of Standards and Technology Center for Neutron Research. The scope includes routine maintenance, cleaning, and repairs for two sets of cooling towers that cool the reactor's secondary cooling water. One tower is a 2002 structure with three cells, the other is a 2011 modular tower with two cells. Services are also required for related subsystems like a deicing system, fire protection system, and plume abatement system. The aging right-angle gear drives in cells 1-4 need special attention. The objective is to inspect, clean, perform maintenance, and complete any necessary repairs on the cooling towers and connected subsystems to support continued operations at the Center for Neutron Research reactor facility. The Department of Commerce National Institute of Standards and Technology is the contracting agency.
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Component Conducti vity pH Hardness
, total Hardness , calcium
Alkalini ty, total
Phosphon ate
Molybdat e ATP
Make-up Water 446 Record
7.4 Record
Record
Record
Record
1.03 Record
Cooling Tower 1470 1400 max
8.7 8 - 9
600 max
500 max
400 max
4.02 15 max
1.32 1 - 2
150 max
Component Cond.
Cycles
Alk Cycles Hardness
Cycles Phosphat e Cycles
Cooling Tower 3.3 6 max
3.1 6 max
4.0 6 max
3.9 6 max
Inventory Chemstar 120 Amount Previous Delivery Est. Daily Usage Est. Remaining Unit
Cooling Tower 20
0.8750
<28 Days Gallons (US)
Chemstar 509 Amount Previous Delivery Est. Daily Usage Est. Remaining Unit
Cooling Tower 140
0.8750
<98 Days Gallons (US)
Opening Comment During today's visit the following services were performed:
All wet chemistry tests were performed on the make-up water and cooling water.
Adjustments were made where necessary.
Recommendations for improvements were discussed with the operators.
Make-up Water Online The conductivity is down to approximately 450 this week, but it is still higher than normal and is decreasing our cycles of concentration which increases water and chemical use.
Cooling Tower Online All tested parameters are within the control limits.
Based on the current Calcium, phosphate and alkalinity levels in the tower water we can increase the conductivity set point to 1750uS. This will get our cycles up without to account for the increase in make-up water conductivity. The goal is to keep cycles between 4 and 6 where cycles = (tower conductivity/make-up water conductivity).
This will also reduce chemical and water usage.
Closing Comment Thank you for your business. Please do not hesitate to contact us with any questions concerning this report.
Bryan Deal Chemical Engineer 443-417-7954 Email: bdeal@chemstar.pro
Service Report Cooling Tower Report
Monday, November 18, 2019 11:37 AM EST
Center for Neutron Research
NIST
100 Bureau Drive Stop 6101
GAITHERSBURG MD 20899-6101
(301) 975-6957
Report Number: 109690 Recorded By: Bryan Deal
(443) 417-7954 bdeal@chemstar.pro
Research Building - Cooling
International Chemstar, Inc. - 9601 Pulaski Park Drive Suite 406, Baltimore MD 21220 (410) 391-7516
Service Report Cooling Tower Report
Monday, November 18, 2019 11:37 AM EST
Center for Neutron Research
NIST
100 Bureau Drive Stop 6101
GAITHERSBURG MD 20899-6101
(301) 975-6957
Report Number: 109690 Recorded By: Bryan Deal
(443) 417-7954 bdeal@chemstar.pro
Research Building - Cooling
International Chemstar, Inc. - 9601 Pulaski Park Drive Suite 406, Baltimore MD 21220 (410) 391-7516
File details come from the government source that posted it. Updated .