ML19268B895
| ML19268B895 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/24/1979 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NUDOCS 7907190003 | |
| Download: ML19268B895 (2) | |
Text
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- O!'LADELPHI A 'E1ECTHIC COMPANY fesch Bottom Atomic Power Station.
. Delta.. Pennsylvania q'
17314
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., 'T May 24, 1979
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$b Mr. Royce H. Grier h.:
i Office of.1napection and Enforc.ement y
Region 1 5
United States Nuclear Regulatory Cn-mission M.h 631 Park Avenue
- p K.ing of Prussia, PA 19406
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SUIL1ECT:
REPORTASLE OCQJP3ENCE - PROWT WOTIFICATION u
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<l Confirming C. E. Andersen's 4onversation with Mr. Baunack, Region 1, j
United States Nuclear Regulatory Commission on 5/24/79.
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Reference:
' Docket No. 050-277/76 f!S Peach.Bottosa Units 2.and 3 h.?.
3'achn&cm3 Specit'ication
Reference:
3.6.C.6 y
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R,eport No. 2-79-26/1P
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' Occurrence Date:
5/24/79 A
3
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Identification of,0ccurrenco:
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.du?n Off-gas stack radiation monitor sample system inoperable for about 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br />, and plant shutdown not iniciaced.
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Conditions Prior to Occurrence:
, s.p 1[Q Unit 2 in startup mode at S-7% power.' Unit 3 operating at 90% power.
~o Mi bS Apparent Cause of Occurrence:
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under investAgation.
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. Analysis of Occurrence:
i0n S/24/79, the. operating stack gas sample pump
_. failed due to a broken. belt.
The alternate scap was not set up in the autossatic. mode due to operational problems.
The low stack sample flow
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. annunciator alarm in the control rooes annunciated but na lamediate corrective 9
. action was taken.
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other radiation monitors on.both units 6ere in service at t he time and none ot'
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.them exhibited any off normal conditions.
The.t eck.xadiation recorder becarw
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insensitive and printed a : straight line at the saae icvels of activity 43 den the saepin ::.ystem had ibeen > operating properly.
Due to the f ac t.t h a t other p] ant
.radiatico monitors were all in service and none of thcu showed any abnorm.41
'.9 tconditions, it it deprobable that any significant < change in reio.3e rate-I
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0 occurred-during this-period.- For these reasons, the: safety significance of this occurrence is minimal'.
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Corrective Actioni
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tW discovery of' the.*ource of this probles the other skapte pump was annus11y.
placed in service and the system responded. normally.
An investigatiert into the delay in respeding' to the annunciater and. the reason for the alternate pump not. beina in' the standby. condLthn: is, in progress.
Very truly yours, g
--- p ",7 &.g & J W. 7. tlkirich
. Statierre Superintendent-M U).11er
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