ML19294B990
| ML19294B990 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 01/18/1980 |
| From: | Andognini G BOSTON EDISON CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-01, IEB-80-1, NUDOCS 8003060506 | |
| Download: ML19294B990 (2) | |
Text
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B O STO N EDISON COMPANY GENteAL orricru 800 BovtavcM STaccT BOSTON. MAES ACMueETTs 0 2199 G. CamL AmoQGNINs BuPENINTENDENT MuCLEam OPERATIONS DEPARTMENT January 18, 1980 BECo. Itr. #80-11 Mr. Boyce H. Grier, Director Office of Inspection and Enforcement Region I
- U.S. Nuclear Regulatory Cocmission 631 Park Avenue King of Prussia, PA.
19406 License No. DPR-35 Docket No. 50-293 Response to IE Bulletin 80-01
Dear Sir:
In a telecopy of January 14, 1980, you transmitted IE Bulletin 80-01.
Boston Edison was requested to take the following actions in a review of the ADS Pneumatic Supply.
Action 1 Determine if your facility has installed hard-seat check valves to isolate the ADS accumulator system from the pneumatic supply system.
Response 1 Pilgrim Station has hard-seat check valves installed to isolate the ADS accumulator system from the pneumatic supply system. Actions have been initiated to obtain soft-seat check valves and install them prior to the completion of the 1980 Refueling Outage, presently in progress.
Action 2 Determine if periodic leak tests have been performed on your ADS accumulator system 9 to assure emergency pneumatic supply for the FSAR required number and duration of valve operations.
Response 2 Periedic leak rate tests have not been performed on the ADS accumulator systems. However, a leak rate test program is being developed and will be implemented prior to the end of the Refueling Outage.
This program will assure adequate emergency supply for the FSAR required number and duration of valve operations.
8008060 506
EcpTou EctscN COM PANY.
Mr. Boyce 11. Grier, Director January 18, 1980 Page 2 Action 3 Review seismic qualifications of the ADS pneumatic supply system:
(a) from accumulator system isolation check valve to ADS valve operator.
(b) from isolation valve outside containment up to ADS accumulator check valve.
Response 3 (a) & (b)
A review was conducted of all documentation relevent to the ADS pneumatic supply lines by Boston Edison's Systems and Safety Analysis Group. Addi-tionally, Bechtel Corp., the original AE for Pilgrim 1, conducted both a docu=entational review and a physical inspection of the subject lines.
The results of both review efforts show the ADS pneumatic supply lines from the outside containment isolation valve to the ADS valve operator are Class 1, seismically qualified.
The physical inspection perfor=ed by a Bechtel Engineer, revealed that 2 of the 4 pneu=atic supply lines within the containment may not be in confer =ance with the original design criteria.
These lines will be reanalyzed by Bechtel and any resultant modifications incorporated prior to completion of the 1980 Refueling Outage in progress.
Action 4 Based upon determination of items 1, 2 and 3 above, evaluate operability of the ADS for the conditions under which it is required to be operable including a seismic event.
If operability cannot be established adhere to appropriate Technical Specification action statement.
Response 4 Based upon the conclusions resulting frem the above reviews, Boston Edison is confident that the ADS shall perform as designed for all required conditions including a seismic event.
We trust this response adequately addresses your concerns.
However, should you have any further questions, do not hesitate to contact us.
Very truly yours,
s/
ec: United States Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Operation Inspection Washington, D. C.
20555
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