ML20066A854
| ML20066A854 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 10/27/1982 |
| From: | Morisi A BOSTON EDISON CO. |
| To: | Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| REF-SSINS-6820 82-281, IEB-80-17, NUDOCS 8211060246 | |
| Download: ML20066A854 (2) | |
Text
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6 BOSTON EDISON COMPANY DENERAL Orrects 800 BOYLe7DN STREET 50sf 0N, M Ase AcNusE77s 0219 9 J
A. V. MORisi MANADER HucLEAR OPERATION 5 EUPPORT DEPARTMENT October 27, 1982 BECo. Ltr. #82-281 Mr. Ronald C. Haynes Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 License No. DPR-35 Docket No. 50-293 Follow-Up Infonnation to IE Bulletin 80-17 Supplement No. 3
References:
a) Letter from B. H. Grier to G. C.
Andognini, August 22, 1980
" Supplement #3 to IE Bulletin 80-17" b) Letter from A. V. Morisi to B. H.
Grier, September 8,1980 " Response to Supplement #3 to IE Bulletin 80-17" c) Letter from T.A. Ippolito to A. V.
liorisi, January 9,1981 " Order for Modification of License" d) Letter from A. V. Morisi to B. H.
Grier, February 4,1981 " Response to IE Bulletin 80-17, Supplement #4"
Dear Sir:
In your letter of August 22, 1980, Reference a), Item 1.b; you requested that Boston Edison Company (BECo) provide or verify that procedures are in effect to:
1.b.
Require an immediate manual scram in the event of:
(1) Multiple rod drift-in alarms, or (2) A marked change in the number of control rods with high temperature alarms.
Reference a) also stated that:
" Installation of water level instrumentation in the scram discharge volume with level alarm and continuous level indication in the control room, in response to Item B.1 of IE Bulletin 80-17 Supplement No.1, may provide a basis for relaxa-tion of the time for initiating a manual scram."
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1 BOC DN EDISON COMPANY Mr. Ronald C. Haynes October 2 U 1982 Page 2 l
f In response to this request, BECo submitted the following response in Reference b):
1.b.
(1) Station procedures were revised to require a manual scram in the event of drift of 2 rods in a nine-rod array.
(2) Surveillance procedures were implemented to provide for a daily check of Control Rod Drive temperature.
Additionally, the withdraw header will be monitored for any increase in temperature for alI CRD's whose -
temperature exceeds 2500 New procedures we're implemented requiririg manual shutdown if 36 CRD's (25%) indicate leakage into the' scram discharge header.
i Temporary Procedure, T.P. 80-74 "Detemination of Leaky CRD Scram Outlet Valves" was initiated to meet these interim requireme1ts. This procedure reouires daily surveillance.
Since the implementation of the temporary procedure BECo received an Order for Modification of License on January 9,1981 Reference c), stating that an automatic system shall be installed and operational to initiate control rod insertion on low pressure in the control air header. This work has been completed and is operational.
BECo also stated in their letter of February 4,1981, Reference d), that a continu-ous water level monitoring system for the Scram Discharge Volume was installed, tested by the single rod method, and decTared operational.
As a result of these two modifications BECo has retired Temporary Procedure TP-80-74 " Determination of Leaky CRD Scram Outlet Valves".
If you have any questions, please do not hesitate to contact us.
Very truly yours, f/NN
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