ML19338D647
| ML19338D647 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 09/16/1980 |
| From: | Sieber J DUQUESNE LIGHT CO. |
| To: | Ross W Office of Nuclear Reactor Regulation |
| References | |
| BVPS-LC:JDS:397, TAC-42200, NUDOCS 8009230601 | |
| Download: ML19338D647 (3) | |
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Post Office Box 4 Shippingport, PA 15077 September 16, 1980 BVPS/LC:JDS:397 Memorandum of Telephone Conversation Qualification of Chlor: te Detection System Reference Regulatorv Guide 1.95 Mr. William J. Rosa, Licensing Project Manager United States Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Division of Licensing Washington, D. C.
20555
Dear Mr. Ross:
This memorandum confirms our telephone conversation on September 15, 1980 concerning the specific acceptance criteria contained in Regulatory Guide 1.95.
The typical sensitivity of the chlorine detector is 5 ppm chlorine (by i
volume) in air. The detectors and associated piping are located in the service building beneath the control room.
The chlorine detection systems are soon to be tested and the response time of the system including detector response time, valve closure time and associated instrument delays are expected to be less than 10 seconds.
If the criteria is not met, we will notify you in the event this happens in later correspondence.
The system meets the single failure criteria including redundant, physically separate power supplies, detectors, actuating electronics, and interconnecting cabling. The three separate systems are CLA-VS-101A, CLA-VS-101B and CLA-VS-101C.
The necessary equipment for isolating the control. room upon detection of chlorine gas is activated by a 2/3 logic
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- Memor adum cf T21cphona Conv;rsation Qualification of Chlorine-Detection System Reference Regulatory Guide.1.95 Page.2 The electrical components'of:the detectors are installed within a sealed enclosure and are shock-resistant and suitable for use in nuclear power plants.
The detection systems are qualified for all expected environments and.
for severe environments that could clearly lead to or be-a result of a ' chlorine
, release and'are protected-from adverse temperature effects as qualified by the
-1971-specificetions.
The routine operational checks are conducted on the chlorine detection systems at two. week intervals.. Verification testing and calibration of the chlorine detectors and verification testing of'the system response-time are conducted at 18 month-intervals.
If you have any questions regarding this memorandum, please contact my office.
Very truly yours,
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b j/tsJ. D. Sieber Superintendent Licensing and Compliance RN1:ba 4
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,: 9-Memorandum of. Telephone Conversation' LQualification of Chlorine Detection System et Reference' Regulatory Guide 1.95 '
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'R. F. Burski R. N. Ireland:
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