ML20107E189

Forwards Preliminary AO Rept 50-219/74/8

ML20107E189
Person / Time
Site:	Oyster Creek
Issue date:	01/24/1974
From:	Carroll J JERSEY CENTRAL POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18039A986	List: IR 05000219/1970007 IR 05000219/1971001 IR 05000219/1971002 IR 05000219/1971003 IR 05000219/1971004 IR 05000219/1971005 IR 05000219/1972001 IR 05000219/1972002 IR 05000219/1972003 IR 05000219/1972004 IR 05000219/1972005 IR 05000219/1972013 IR 05000219/1972025 IR 05000219/1973003 IR 05000219/1973004 IR 05000219/1973006 IR 05000219/1973007 IR 05000219/1973008 IR 05000219/1973009 IR 05000219/1973010 IR 05000219/1973011 IR 05000219/1973012 IR 05000219/1973013 IR 05000219/1973014 IR 05000219/1973015 IR 05000219/1973016 IR 05000219/1973017 IR 05000219/1973019 IR 05000219/1973020 IR 05000219/1973021 IR 05000219/1973022 IR 05000219/1973023 IR 05000219/1974001 IR 05000219/1974002 IR 05000219/1974003 IR 05000219/1974004 IR 05000219/1974005 IR 05000219/1974006 IR 05000219/1974007 IR 05000219/1974008 IR 05000219/1974009 IR 05000219/1974010 IR 05000219/1974011 IR 05000219/1974012 IR 05000219/1974013 IR 05000219/1974014 IR 05000219/1974015 IR 05000219/1974016 IR 05000219/1974017 IR 05000219/1974018 ... further results
References
FOIA-95-258 NUDOCS 9604190235
Download: ML20107E189 (1)

Text

c_

.r

'i ',.

'.p..

.O

. s.

.', E':l

,,i,

' il:

.t

, c, f

e

'q]j',

To:-

James PPk.0'Reillyt Directorate.cf Regulatory;0perations-Regi9p I' 631 Park Avenue King.of. Prussia, Pennsylvania.

19406,+

. I-From:-

' Jorsey Central twer..4 1.ight Company >.

Oyster Creek ' Nnclear : Generating St& tion. ' Docket ' # 50- 219 F#rked. River, New Jersey : ;08731.-

4

Subject:

Abnormal Occurrence Report'.NoT.50-219/74/1,.

'Ihe' following.is a preliminary report being; submitted j

in compliance with :the: Technical Specifications c

paragraph 6.6.2 Preliminary' Approval:.

n' g/)

1/24/74

_t. _ _

f kT4 '. Carroll; Jrc M, Date-I cci Mr. A Glanhusso. '

,3 i

9604190235 960213 PDR FOIA DEKOK95-258 PDR

{

Dsts cf-3

' nitin! Teleph:ne -

1/p i

. v.

. NI74 -

Occurrencet..)

1/17/74 Report Datot l

Initial. Written-Time.of

. Asport Dete 1125/.74 % " W '

'occurreneet. -

1055

OygrER'CREl!K NUCLEAR GENERATING STATION PORKED_ RIVER,.NBW JERSBY '08731 Abnormal Occurrence-4 Report No. 50-219/74/ 1 IpeNTIFICAT10N Violetion of'..the Tochnical Spacifications, paragrsph 2.315,

OF 000URRMCEt

- which requires that. isolation condenser system' initiation occur with a time delay.cofa.<15 seconds after.a.specifiedihigh

~ 7? "E.W, i

reactor pressun is reach'5d.7-

\\

'this event-is considered to be an abnomal occurrence as de, fined in the Technical Spo' ifications, paragfaph '1.15A.

c

~

CONDITIONS PRIOR TO OCCURRENCE:

5teady State Power Routine Shutdown flot Standby-Operation T Cold Shutdown Load Changes During Refueling Shutdown Routine Power Operation Routine Startup Other. (Specify)

_ Operation The plant was shut'down with the reactor coolant at <212'F.

[

/

ItSCRIPTI(N While perfoming a routinc surveillance test on the reactor OP'OCCURRJJNG:

high pressure isolation condenser initiation switches, contacts on three.out of the~.four associated' time. delay, relays failed to close within the preset. time delay 'of 15. seconds.(after each pressure switch was tripped and the associated relay doenergized),

The' delay times of thess thne.nlays were found to be.as i

follows i

{

SloJoivis" 3ff-e

O' 1

~

Abnormal Occurrenco, keport No. 50-219/74/ 8 Page.2 6K9 - 20 sec. -

6K11 - 1627 secc 6K12 - 18>sec.

Each of the involved time delay relays was lunediately reset

- to less ;than 15Asoconds..

APPARPET CAUSE X

Design Procedure"

~ Manufacture Unusumi Service Condition OP OCCURRENCE:

Inc. linvironmental.

Installation /

Construction Componenti Pailure

_ Operator

_ Othd (Specify)

Instrument drift. has been identified as the cause of these excessive time delays.

ANALYSIS OF -

Pour pressure switches in'the reactor protection system-(RPS)

OCCURRiiNClit activate the isolation condenser system.when there is a persis-tent 15 second condition 'with reactor pressure at.or above 1060 psig. Two of these pressure, switch's with associated time e

delay relays 6K9 and 6K10 are in one RPS channel, and the others two pressure switches with associated. time delay relays 6K11. sad-6K12. are in tho' other RPS channel. High pressure signals from l

two pressure switches,Jonocin each' RPS. &ansel,;are required to activate the'1801stion ; condenser, system'(coincidence o'f two[7"["j RPS channels.each:of which isttripped by one of!two' pressure j

s6nsors).. Accordingly,..the ;exces.sive Nine.dela'ys of these:three-time delay > relays (would:have resulted in ;an ! solation condenser system initiation, delay! ime'greaterithanc15 seconds, had)the <

t isolation pressure been reached.- :1here.is no evidence,'howsvor, to. indicate'that isolation condenser system initiationtwould not-have'taken place w'ith th.three time 41a'y relays operating.as.

ibund.

As detailed in IAttachment 65 to.the FDSAR, at least one

[

in '

.O^

j

i Abnormal:Occurrenec:-

Report >No. 50 219/74/1 Page 3.

3 of-the isolation condensers is required ito act as.a means of '

heat renoval during a: postulated losscof: coolant accident, The safety significance:ofithe: initiation delay time:in excess.

ofil5, seconds is being evaluated.at. this-time.

CORRECTIVB-Corrective action Will bc' determined following review of this ACTION: -

abnormal ocmrrence by. the Plant. Operations Review., Committee. '

. FAlt#g;DA'rA;...

P_er.tinent maqdfacturer_ data are listad_bglow:-

Manufacturer: Agastat-Model:. 7022 Pffr Ranger-5 to 50 seconds Coll:

320V DC Serial Numbers: 6K9 - 1712235 -

6K31'- 1712237' 6K12 - 1712228~

l i

l Prepared by: \\

%wk-Datei

\\\\%,

rT1 x

t