ML20086M169
| ML20086M169 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 02/10/1984 |
| From: | Haynes J SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF ADMINISTRATION (ADM) |
| References | |
| NUDOCS 8402160386 | |
| Download: ML20086M169 (2) | |
Text
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_. 4 Southern California Edison Company
,C,5W SAN ONOFRE NUCLE AR GENER A TING ST ATION P.O. SOM 128 S AM CLEMe!NTE. C ALIFORNI A.2672 J. G. H A YN E S TatspwoNs ST ATION M ANAGE A
{734)492-7700 February 10, 1984 i
l' U.- S. Nuclear Regulatory Commission l
i~
Document Control Desk Washington, D.C.
20555 I
Dear Sir:
Subject:
Docket:No. 50-361 Ja nua ry 11, 1984 Immediate Notification San Onofre Nuclear Generating Station, Unit 2 In accordance with 10 CFR 50.72(b)(1)(ii)(B), an immediate notification was made shortly af ter midnight on the morning of January 11, 1984'.
That notification reported that Unit 2 was outside its-design basis in that both High Pressure Safety Injection (HPSI) trains-were considered inoperable for approximately twenty-five. (25) minutes. - Upon further evaluation i
on January 11,.1984, it was established that the notification was unnecessary.in that only one train of HPSI had been rendered
' inoperable, as permitted by Limiting Condition for Operation (LCO),' Action Statement 3.5.2(a), and at no time was Unit 2 in a condition that was outside the design basis.
The-immediate notification was originally made by considering the Train "A" HPSI to be inoperable when the Train "A" Diesel was removed from service.
Since the Technical Specifications specifically_do not require emergency power sources to be operable in order for equipment served by such emergency power sources to be considered operable. Train "A"
HPSI should not l
have been considered inoperable.
The Train "A" 1E Bus which provides normal power to Train "A" HPSI remained energized and offsite power remained available.
l The incident was reviewed in detail by Station Management on January ll, 1984.
In addition, our analysis of the occurrence p
has been discussed with the NRC Resident Inspector.
~ihe shift and staff personnel responsible for making-immediate notifications to -the-NRC have been instructed to err on the conservative side and make a notification, even if there may be some doubt as to the applicability of 10CFR50.72 or the validity
.of the initial information.
In this case, such notification was
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-~ February 10, 1984 made and subsequently.determ!,ned to be unnecessary.
Consequently, no 10 CPR 50.73, " Licensee Event Report System", report will be made.
If_you have additional questions or comments regarding_this event, please contact me.
Sincerely, s
^
N1 J. G. HAYNES STATION MANAGER' P
PACroy:2405u:dkd cc:
J. B.
Martin (Regional Administrator, Region V)
A. E.
Chaffee (USNRC Resident Inspector, Units 1, 2 and 3)
J. P.
Stewart (USNRC Resident Inspector, Unitsi2.and.3)
U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Institute of Nuclear Power Operations (INPO) s.