ML19322A427

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RO 76-18/1P:on 760513,discrepancy Noted in Time Between Coolant Pump Monitor Circuits Sensing Change in Operational Level & Original FSAR Estimates.Safety Analysis Rerun by Vendor W/O Exceeding Safety Limits
ML19322A427
Person / Time
Site: Crane 
Issue date: 05/14/1976
From: Colitz J
METROPOLITAN EDISON CO.
To:
References
NUDOCS 7910240857
Download: ML19322A427 (2)


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nsese m tss GTETRCM1 TAM ED,tSON CCMPANY suostouarorcem mucommescoa

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90GT OFFICE DcIX 480 MIDDLEYOWN.Pt'NNSYd.VANm 1PCS7 Tf.L&*MONE 717-044 40".1

-M fd.ay 1976

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@M fir. J. P. O'Ref13y

%'racturate of 'Rc*tulstory Doer:tions V W,I Cenion 1 Ciuricar Eleau?c.ory Ccccission p0 r,iI n

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ting nf Prussis,.Pennsyivania IMCS g

Gneratia Z. a.se "P.".-50

. Eceket 6 - M SEJECT-Ec:crtable Occurrence fio.

Ucar dr. C'Geilly-

{lietf,cn 3 'iRC) ard Mr. J. J. Celttz TU I-3 Unit Stip 2115 tcurs ca 13 5%y T976.

6.9.2.A (3) of the Tochoica.1 Specificaticus.The following re The Rcac'nr Enolant Pu:ra ecnitor Ctr:sst ;:rc.rittes a safety Mated functicn in tirat -it allows certoin allswchle Acxer levels de;;cr.rlent on the combitraticn of Reactor Ecolant Pumps that are oper 9

delay for the coactor Ccebnt Pama Panitor.N. rcui ccrating yump ccmbination is is M ;rscc.

<24G msec. yet the existing.ti:e ricL2y 4M:

Tite aff.m'ed analysis is FSAR Secthn IC.1 ~d.5

_ loss of Ccolent flew. The trip delay time.duen cn Tables 4-11 (fS -25) incitdes 'Pur p Pswer N.wi*o -

Ucicy Time end llcactor Protection Sys'em reicy Tit.e.

i 7910240 f/

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ffr. J. P. O'Reilly

. 54 May 1976

.As correcttee. action our USSS Vendor, S 1 #A, has already re-run tte affected safety analysis with an assumed time zielcy of 550 msec acd r.o accicent analysis limits were esoceded.

Therefore. no.pbysical changes to the p.lant will te.nntessery_

further tnformation will fonow in the. required fearteen (34) day report.

very tr.u13 ycurs,

.&f yJ./J.folit[

iftrit I Superintendent Three Mile 1s3and MucTear Station J2C/ pes 9%

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