ML20086J126
| ML20086J126 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 12/19/1974 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086J125 | List: |
| References | |
| AO-74-38, NUDOCS 8401230206 | |
| Download: ML20086J126 (2) | |
Text
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i-PIIIL/.DELPr!IA ELECTRIC CDMPMa*
i; Peach Botton Atomic Fover Station 1(
Delta. Pennsylvania L i 17314 Deccabor 19, 1974 f?
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Mr. James P. O'Reilly, Director b
17nited States Atomic Encrgy Cor=ission Directorate of Regulatory Opetations j
631 Park Avenue j
King of Prusela, Pennoylvania 19406 p
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Subject:
Abnormal Occu-rence 24 '{our_ No,t,1,flyjttlan
- y Contirming R. S. Fletschmann's phene convere:ation with Mr. Walt 11aunack, H
A.E.C. Region 1 Regulatory Operationo Office on December 19, 1974.
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Reference:
License Number DPR-36 Technical Specification
Reference:
3.5.C g
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Report No.:
50-270-74-18
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Report Date:
December 19. L974 j
occurrence Date:
December it!,1974 1
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Facility:
Pench Botton Aconic Power Station fd 6-
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R.D. 1 Delta, Pennnylvanin 17314 r\\.^
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A-r identif hat 101 of Occurrence:
0
.Y' Manual isolat ion valve f rem the "B" Core Spray Dischargo !!mtder tic "[ II N the " Stay Full" system accuculator was found cloacd; this valve o
f should be open.
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Condittens Petce to Occurrence:
y Unit 3 at approximately 7L* power.
p Description of Occurrence:
4 lihile conducting ST 1.5, the "B" Core Spray Logie System Funct tenni Surve tLLance Tent,- it was nnt posn tbic to pressur t:c between MOV-3-l'+-110 j
and MOV-3-L4-L2B to s troke the.later valve.
Investigaticu determined
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that the ntay full systen vont solenold, SV-5224, uhteh opens on low g
level, v.as open.
Further investigation found that the "S:ay Full"
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accumulo'.or vau volved out of acrv tec.
The " Core Spray Line Vent
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.Accvaulater Lew Level" alarm was alno found to bn inoperrible.
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V Designatton of Apparent Cnuae of Occurrence:
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Because the last checkoff lint shown that the valve waa open,*4 and becuuno the innt Lab calibration on this ' accumulator van prior to the l
checkof f lies t, the reason for the vntve being closed in unknown and is bein6 investigated.
8401230206 741
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gDRADOCM03000 8
Analysis of Occurrence:
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'The fact that thin valve una cloned - has, very lit t'le safety tmpt tent ton becnune the synten in prenurited continuouniy by the condensate _
l tranefer systen?
'a1 ion the pyntes van returned to service it van judged j
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l that. the pipin:;; system vaa full except for. t he accumulator.
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3 Corrective Action:
The Unit 3 Coro Spray System Volve check-off Lint una redone; no othe.c valvits wer i found to be "off-nortwl".
The " Stay Full" synten valving on both Unit 2 nnd UnLt 3 PJIR and Core Speny syntoms were verified to be aligned properly.
The icvel annunciator ratcranwltch which failud to alam the low icvel vill be repaire d.
Fa11urc Dnta:
None previoun on the " Stay Tull"nyntem.
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Very truly youro,
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W. T. Ullrich, Super totondent Peach 13otton Atomic Power Station i
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