ML20024E423

LER 83-066/03L-0:on 830701,during Creacus Surveillance Testing,Train B Declared Inoperable After Emergency Chilled Water Unit E-335 Failed to Start.Caused by Malfunction of Control Circuitry or Power Supply breaker.W/830801 Ltr

ML20024E423
Person / Time
Site:	San Onofre
Issue date:	08/01/1983
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
LER-83-066-03L, LER-83-66-3L, NUDOCS 8308150011
Download: ML20024E423 (4)

Text

- - 7 s N2C FORM 366 w a mucLE AR ptougatomy CouMts% SON AWROVEC Ev CMS q LICENSEE EVENT REPORT 31so4c n fo*C' 2 so (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATIONI CONTROL BLOCK: l l l l l l @

I oIi .I IC I ............

A l S 10 l 5 l 2l@l0 l0 l- l 01010 l010 l - 1010 l@l4 ,,

l 1 l 1,,..l 1l1

.. ....... .. l@l l l@

CONT l o li l  :::: l L l@l0 l5 l010 .,

l 013 l 6l ll@l 0 l 71011

.....,~.... ..

1813 l@l 0 l 8101.1 1813 l@

EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES O'o l o l2 l lWith both Units in Mode 5, at 1215 CREACUS Train "B" was declared inoperable l lo la llafter Emergency Chilled Water Unit E-335 failed to start during CREACUS I lo l4 l lsurveillance testing per Procedure 5023-3-3.20. LC0 3.7.5 Action Statement 'a' l

[olsllwas entered. After E-335 started successfully, the surveillance test was com- l j o j 6 l lpleted. CREACUS Train "B" was declared operable at 0559 on 7/2/83 and the Action l lo l7 l l Statement was satisfied. (See Attachment. ) l o el "

l

' " ':." *:::: .::n . ........,.... .::e":.. .::a .

l o l, l l A l Al@ lE l@ [ X j @ l Hl TjE lX lC l H l@ lG l@ l Z l@ ,,

. . . . . . . . . , m. ... . ....n ........

j8l3l [-J l 0l6 l 6 l l/l l013l lL l l-l W

_ , , o ,, ,. ,, .. ,. .

= :: = :: ::::::, ::,:::~ .. .. @ '::::,, "

.::: :. " ::. = - .::::::,=..@

IX n

l@lu X l@ lZ n l@ lZ .

!O I.-o ! 010 to I lYI@ IN .. .. u l6 lAo i@ lXl9I9l9,!

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 lilo ]lThe failure of E-335 was apparenfly due to either a malfunction of its control l Iili l[ circuitry or a mechanical nalfunction in the E-335 Power Supply Breaker l l,l7 l152-3A0602. E-335 started successfully after transferring from the Unit 3 to  ;

l 3 l 3 l lthe Unit 2 power supply. An investigation of the control circuitry and Supply l

t il 4 l l Breaker 152-3A0602 will be conducted. (See Attachment.)  !

' .hn':

!ilsiIB l @ l O l0 10 l@! N/A [S_J@l Surveillance Test I

' " " ~

': h=:. d:::: ".. ".. .. ..,.... @" ................@

lilelIZl@[Zj@l N/A l l N/A l lij7ll010l0lgiZl@l N/A  ;

.=::~~=::,.,.. @

j ,l,l l0 l0 [0 l@l N/A l I".f' " ".'h'i'.kho'.""@ g- Z2 i 9 y @l N/A f//

3 "

l i n . ... s. '.'........@

. ,, , 8308150011 830801 NaC ust oNo PDR ADOCK 05000361 I l o l lN l@l" s PDR l lllllllllllll Nivre,,,ntPAnta H. B. RAY f b ' % ,.oNr (714) 492-7700

. i

.- es ATTACHMENT TO LER 83-066 SOUTHERN CALIFORNIA EDISON COMPANY SAN ONOFRE NUCLEAR GENERATING STATION UNIT NO. 2, DOCKET NO. 50-361 SUPPLEMENTAL INFORMATION FOR EVENT DESCRIPTION AND PROBABLE l I

CONSEQUENCES There was no impact on public health or safety since CREACUS Train  ;

"A" remained operable throughout this incident. See also Unit 2 LER No.83-049 and Unit 3 LER No.83-043.

SUPPLEMENTAL INFORMATION FOR CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Corrective actions as required will be initiated. At the conclusion of the investigation, an update to this LER will be issued. ,

1323u l

l l

t

, r-- - . . . . . , , _ , , ,_ , _ _ _ . _ , , _ . _ __ _,,

. . - _ . . - _ . - . - - - _ - - = . . - .. _-.

RECEIVED

RPC Southern California Edison Company t= i

$AN ONOFRE NUCLE AR GENER ATING C93 Ag~ '

STATION 'i P.O. Bo x 12 8 ,

S AN CLEMENT E, C ALIFCRNI A 92672 i H. 8. R AY b[I E[,]p' "LEN0aE August 1, 1983 4

. Tar'Oa aaaaaEa " " " " " "

h5 t

i a

i j

l U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement 1

Region V i 1450 Maria Lane, suite 210 Walnut Creek, California 94596-5368

[ Attention: Mr. J.B. Martin, Regional Administrator 1

Subject:

Docket Nos. 50-361 and 50-362 30-Day Report .

Licensee Event Report No.83-066 (Docket No. 50-361)

San onofre Nuclear Generating Station, Units 2 and 3 Pursuant to Sections 6.9.1.13.b of Appendix A, Technical

~

Specifications to Facility Operating Licenses NPF-10 and NPF-15 for San Onofre Units 2 and 3, respectively, this submittal provides the required 30-day written report and a copy of Licensee Event Report (LER) No.83-066 addressing an occurrence

' involving Limiting Condition for Operation (LCO) 3.7.5

, associated with the Control Room Emergency Air Cleanup System (CREACUS). Since this occurrence involves a shared system t- between Units 2 and 3, in accordance with NUREG-0161, a single

LER for Unit 2 (Docket No. 50-361) is enclosed.

• i If there are any questions regarding this event, please contact me. "

em*-er e.ei - ev. -.*-==mg m.. p A. ._g..,. ,,

Yh /11%vx

Enclosure:

LER No.'83-066 l

I ..-p.h

.. ' .:; O Mr. J.B. Martin cc: A.E. Chaffee (USNRC Resident Inspector, Units 2 and 3)

J.P. Stewart (USNRC Resident Inspector, Units 2 and 3)

U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Division of Technical Information and Document Control Institute of Nuclear Power Operations (INPO) 1323u l

l