U-600809, Notifies of Rev to Fsar.Leak Detection Sys Will Comply W/ Ansi/Isa Std S67.03-1982, Std for LWR RCPB Leak Detection, in Place of Technically out-of-date Reg Guide 1.45, RCPB Leakage Detection Sys
| ML20207P199 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 01/12/1987 |
| From: | Spangenberg F ILLINOIS POWER CO. |
| To: | Butler W Office of Nuclear Reactor Regulation |
| References | |
| RTR-REGGD-01.045, RTR-REGGD-1.045 U-600809, NUDOCS 8701150224 | |
| Download: ML20207P199 (2) | |
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L30-87(01-12)-L 1A0120-lLLIN018 POWER COMPANY CLINToN POWER STATION, P.o. 80X 678. CLINTON ILLINOIS 61727 January 12, 1987 Docket No. 50-461 Director of Nuclear Reactor Regulation Attention:
Dr. W. R. Butler, Director BWR Project Directorate No. 4 Division of BWR Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Clinton Power Station Revision'to the CPS FSAR Concerning Change in Compliance of Leak Detection System to Regulatory Cufde 1.45
Dear Dr. Butler:
Regulatory Guide 1.45, " Reactor Coolant Pressure Boundary Leakage Detection Systems," states that the source of reactor coolant leakage should be identifiable to the extent practical. Leakage detection and collection systems should be selected and designed according to Position C.S. auch that leakage to the containment building from unidentified sources should be collected and the flow monitored with an accuracy of I gpm/hr., or better.
In Section 5.2.5.10 of the CPS FSAR, " Regulatory Guide 1.45 Compliance," Illinois Power commits to comply with Regulatory Guide 1.45 and describes the details of that compliance. In the Clinton Safety Evaluation Report (SER), Section 5.2.5, the NRC finds the Clinton compliance to Pegulatory Guide 1.45 acceptable and Item (5) of the SER states, "The sensitivity and response tiime of the systems... for the detection of unidentified leakage are adequate to detect a leakage rate of 1 gpm in less than I hour."
The purpose of this letter is to inform the NRC of a revision to the CPS FSAR. The Leak Detection System will comply with ANSI /ISA Standard S67.03-1982, " Standard for Light Water Reactor Coolant Pressure Boundary Leak Detection," in place of Regulatory Guide 1.45 as currently specified in the FSAR. This is being done because Regulatory Guide 1.45 is technically out-of-date, ANSI /ISA S67.03-1982 is now recognized as the more appropriate requirements document for leak detection systems, and the air particulates monitoring system is not capable of detecting a leakage rate of I gpm within an hour as required by Position C.5 of Regulatory Guide 1.45.
The airborne radioactivity monitoring will he considered as a secondary detection method, along with the monitoring of pressure and temperature, to detect gross unidentified leakage.
8701150224 870112 PDR ADOCK 05000461
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Sections 5.2.5.1, 5.2.5.2 and 5.2.5.10, as well as the Project Position on Regulatory Guide 1.45 in Section 1.8 of the CPS FSAR, will be revised to reflect these changes including a detailed description of limitations of the air particulates monitoring system.
The FSAR revision will be implemented in the next update of the FSAR.
Sincerely yours, k,
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F.-A.Spakgenb
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Manager - Licensing and afety TLR/bsa cc:
Mr. B. L. Siegel, NRC Clinton Licensing Project Manager NRC Resident Office j
Region Administrator, Region III, USNRC Illinois Department of Nuclear Safety i
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