05000272/LER-1979-036, Supplemental LER 79-036/01X-1:on 790410,while in Mode 5 for Refueling,Station Notified of Apparent Design Deficiency. Differential Relay for 4 Kv Vital Buses May Not Meet Design Seismic Qualifications.Caused Not Stated

Supplemental LER 79-036/01X-1:on 790410,while in Mode 5 for Refueling,Station Notified of Apparent Design Deficiency. Differential Relay for 4 Kv Vital Buses May Not Meet Design Seismic Qualifications.Caused Not Stated

ML18081A962
Person / Time
Site:	Salem
Issue date:	01/22/1980
From:	Kapple A Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18081A959	List: 05000272/LER-1979-036, Supplemental LER 79-036/01X-1:on 790410,while in Mode 5 for Refueling,Station Notified of Apparent Design Deficiency. Differential Relay for 4 Kv Vital Buses May Not Meet Design Seismic Qualifications.Caused Not Stated
References
LER-79-036-01X, LER-79-36-1X, NUDOCS 8001290298
Download: ML18081A962 (1)

LER-1979-036, Supplemental LER 79-036/01X-1:on 790410,while in Mode 5 for Refueling,Station Notified of Apparent Design Deficiency. Differential Relay for 4 Kv Vital Buses May Not Meet Design Seismic Qualifications.Caused Not Stated

Event date:
Report date:
2721979036R00 - NRC Website

text

---

17*771 UPDATE REPORT ~ PREVIOUS REPORT CONT~OLBLOCK: ~

....... ~..__--~....___.~*

1 6

S:N~Jr9EVENT REPORT

!PLEASE PRINT OR TYPE AL.L REQ.O INFORMATION!

C§:EJ IN IJ Is I G ls I 1 l@I o I o I - Io Io I o I o I o I -1 o I o IG)l 4 I 1 I 1I1 I 1101 I -1 G) 7 8

9 L.ICENSEE CODE 14 15 LICENSE NUMBER 25 26 L.ICENSE TYPE JO 57 CAT 58

- CON'T CITiJ 7

8

~~~~~ L1J© I o I s I o I o I o I 2 I 7 I 2 101 o I 41 1 I o I 7 *I 9 I@ I o r. 1 I 2 I 2 I 8 I o I G) 60 61 DOCKET NUMBER 68 69 EVENT OATE 74 75 REPORT OATE 80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES@

!With the unit in Mode 5 for refueling, the station was notified by Engineering and

~

!Construction Department that an apparent design deficiency exists.in that the

([IrJ !differential relays for the 4 kV vital busses may not meet design seismic gualifi-

[)))) !cations under certain conditions of a design basis earthquake, the relay contacts

(]JI) !could mechanically operate and disconnect the busses from offsite power or the

[]JI] !emergency diesel generator.

This is the second occurrence of this type (78-22).

[))))

7 8 9 80 [IE]

7 8

SYSTEM CODE IE I Bl@

9 10 t;:;'\\

L.E R 'RO CV ENT YE.A.A

\\:..:,) REPORT I 7 I 9 I NUMBER 21 22

CAUSE

CAUSE COOE SUBCOOE COMPONENT CODE LlLl w@ 1 RI El LIA 1 YI xie 11 12 13 18 COMP.

VAL.VE SUB CODE SUBCOOE LE.J ' L!.I @

19 20 SEQUENTIAL.

OCCURRENCE REPORT REPORT NO.

COOE TYPE l=1 Io @ I 6 I I /I I o 11 I Ix I 2J 24 26 27 28 29 JO l=l Jl REVISION NC. w 32 ACTION FUTURE EFFECT SHUTDOWN t.::\\

ATTACHMENT NPA04 TAKEN ACTION ON PL.ANT METHOD HOURS ~ SUBMITTED FORM ~U8.

PRIME COMP.

SUPPL.I EA COMPONENT MANUFACTURER lLJ@l.LJ@

L...!.1@ -W - 10 Io I 01 o I W@ LU

'JJ 34 '

35 J6 J7

' 40 41 42 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

~@

43 I GI Ol 8 10 '

44 47 I This apparent design deficiency w_as found by NRC inspectors on Salem Unit 2 and OJI] !investigated by PSE&G Engineering Department for Unit 1.

The deficient relays

!III] jwere disconnected and replaced by equivalent relays which meet applicable CiJI] I seismic requirements.

The work was done during the refueling outage under DCR' s

_I o:::I!J IED-523 and 1EC-523A.

7 8

9 FAClL.ITY IJ()\\

STATUS II. POWER OTHER STATUS \\;:::/

ITIIJ W@ I 0 I 01 0 l@)I N/A 80 METHOOOF

~

DISCOVERY -

DISCOVERY DESCRIPTION ~

L,B@I PSE&G Engineering Dept. Notification 8

9 10 12 1'l 44 ACTIVITY CONTENT C\\

REL.EASED OF RELEASE AMOUNT OF ACTIVITY ITTIJ 1.!J@ lLJI N/A 7

' 8 : 9 10 '

' 11 44 PERSONNEL EXPOSURES r.;;:;.,

45

"'6 80 L.OCATION OF AE~EASE @

N/A 80 '

- NUMBER

~TYPE/.::\\ DESCRIPTION [ill] I 0 I 0 1-- 01'5'W~..._-...;N-.:,/..;;.A.;;.._ _____

_,i 8 '9 11 12 13 PERSONNEL. INJURIES I:':\\

80 NUMBER DESCRIPTION~

IIfil I 0 I 0 I_ 0 l@~*-.,...----'N'"""'-=-A=---------------------...,.----J 8

9 12 L.OSS OF OR DAMAGE TO FAClLITY t.;j\\

TYPE

DESCRIPTION

o..::::::J rr:m-W@

NA 7

8 9

10 l'UBl.ICITY D,

~

ISSUEOt.::::;\\ DESCRIPTl.ON ~-

~

L.z.J~ -

NA 7

8 9

10 NAMEOFPREPAREA~~~~~A_.~w~*~K_a~p~p_l_e~~~~~-

. PHONE:

BO 80 NRC use ONLY 1111111111111 68 69 eo (609)365-7000 Salem Ext

• 628