ML20210D658
| ML20210D658 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 02/01/1984 |
| From: | Crews J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20210D653 | List: |
| References | |
| FOIA-86-197 NUDOCS 8609190291 | |
| Download: ML20210D658 (1) | |
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f o i G r.K tu.MORANDi>i FOR: George Knighton, Bran;h Chiet, Office of Nuclear Raactor Regulation FP0M:
J. L. Crews, Sanice Reactor Encincer
- UBJECT:
ACHIEVING COLD SHUTDOWN FROM lHE CONrROL ROOM - DIABLO CANYON This is to conf'tT,i bur disc %sion over the past several weekt regarding the obove tubject.
in a dictussion with Mr. Ccoper, a fonner employte of Pacific 6 S & Electirc Cc.,
he incicated th-t he had learnad frcm otr,er: that. PG&E had stated that the Diallo Canyon pLnt could be brought to cold shutdcrin from the centrol room withnut th; naed for operator actions cetside the control room.
Afte.r furtM r ditcussion with Mr. Cooper, $t was oetermined that t',e was referring to a Mscussion in Supplement No. 7 to the staff's SER (SSEit No. 7).
Specifically, Nr Cooper pointed cut the following stotenent on page 3.3 of SSER tio. 7, "all of the operator actions needed to perf or7;' plant c>ld snutdo.in (except fer periedic curveillence of the Scron cor. centration) ccn be accc.nplishad from the control raur., assuming no s# 1gle failure".
Contrary to this statement, o;eratot actior:s wuld be neces:ary to rock in the electricel breakers for thL.9HR section 1sniaticn valves from the het leg piping.
As e agreed in our discussions on the subject, it appurs the flPP.staf f should consider thl:, inforTaation and the extert to which it raay change any conclusions in the staff's sed.
We plan no fur ther action 01 this subject in Reoion V.
Should ycu or your staff have questions, please give me a cell.
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W J. l..
ews Sandor, eactor Erejincer cc:
T. Bishap D. l(irsch
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