ML20090D226
| ML20090D226 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 08/11/1975 |
| From: | Carroll J, Denton R JERSEY CENTRAL POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| AO-50-219-75-22, NUDOCS 8302250155 | |
| Download: ML20090D226 (4) | |
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James P. O'Reilly Directorate of Regulatory Operations Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 FROM:
Jersey Central Power 6 Light Co::pany Oyster Creek Nuc1 car Generating Station Docket #50-2:
Forked River, New Jersey 08731 e
SUBJECT:
Abnormal Occurrence Report No. 50-219/75/ 22 We following is a preliminary report being submitted in compliance with the Technical
, Specifications, paragraph 6.6.2.
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.. y Preliminary Approval:
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J. T. Carroll, Jr.
Date CC: Mr. A. Giambusso 8302250155 750811 f,
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Jr.12.ial Telephone Date of Ecport Date:
8/11/75 Occurrence:
8/10/75 Initial Written Time of 1435 Report L' ate:
8/11/75 Occurrence:
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01fSTER CREEK NUCLEAR GE ERATING STATION FORLED RIVER, NEW JERSEY. 08731 Abnorest occurrence R* Port No. 50-219/74/22 JDENTIFICATION Violation of the Technical Specifications, paragraph 3.4. A.J.
0F OCCUR E CE:
f ailure_o f_the_.s t ac_k. gas sample system to costinuiiusly ses'while the reactor was in an unisolated condition.,
monitor stack re 1his event is considered to be'an abnormal occurrence as de-fined in the Technical Specifications, paragraph 1.15B CatDITIO.VS PRIOR TO OCCURRENCE:
X _ Steady State Power Routine Shutdown
!!ot Standby Operation Cold Shutdcwn Load Changes During RefuelinS Shutdown Routine Power Operation Routino Startup Other (Specify)
Operation Yower:
Core, 167S NNt Electric, 550 M'.f o 4
Recirculation,13.5x10 SPm Flow:
Feed, 6.55x100 lb/hr.
' Reactor Firessure :
.1020'psiga 10,200 pci/sec.
' Stack-Cas:
02SCRITTIOV At 1435 on August 10, 1975 a stack gss ss=ple line low flow
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CF CCCIMENCE: alarm was received in the Control Room.
An operator was dis-which time, Stack Gas Sample patched to check the Stack Gas Sa:ple Punp at the.thernal overload Funp A was found not running.
The operator reset which started Stack Gas Sanple Pu=p A at 1437.
The torni a;;ount of time the Stack Gas Sample Pump was out of service was approximately two (2) ninutes.
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norsts1 Ocuarrence Page 2
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- por1L No.5D-219/75/
- PpJtD7T CA:SE Design Procedure
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Manufacture Unusual Service Condition h
Installation /
Inc. Environ =cntal Construction Co ponent Failure g
Operator A ther (Specify)
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Tbc enuse of this occurrence is under investi-a gation.
.ALYSIS OF A review of the stack gas radiation monitor recorder traces showed
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ZURRDich the levels of both monitor channels to be relatively constant U
.t 400cysA) with no spiking before and af ter the pump trip.
In a further L
2Socys B
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- fort ts determine if excessive stack releases might have occurred during the
.proxiute two(2) minute period that the Stack Gas Sample Pump was not
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eeratini, recorder traces of radiation monitoring systens associated with two
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.osous streams released through the stack were reviewed.
Off Cas radiation nitor recorder traces showed that the levels of both nonitor channels were i
latively constant (at approximately 1.2Sx103 mr/hr) with no spiking for a j
riod of approximately 60 minutes prior to th2s event.
Sixty (60) minutes is e Off Gas System holdup time prior to relearing to the stack.
In addition, i
review of the Reactor Building Ventilation !!xhaust radiation monitor j
- corder traces showed that at the tino of this event, the levels of both J.
sitor channels were relatively constant (at approximately 1.5 nr/hr) with cpiking.
Based on these considerations and the very short period of time
.ct the stack gas sample pump was not operating, the safety significance of 13 event is considered to be minimal.
e iRRECTIVE The thornal overkoad protection was reset.
After verifying that
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. Stack Gas Sample Pump A was running with no abnormal conditions esent, Stack Cas Sanple Pump B was put into service and Stack Gas Sanple apA was taken out of service.
".IWRE DATA: Previous abnormal ~o';currences
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involving /53.the Stack Gas S' ample Pumps.aq
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Abnormal Occurrence Report No. 74 2.
74/54 3.
74/57 4.
74/61 5.
75/6 O!/ W
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2-August 11, 1975
.. Mr. Jaacs P. 0'Reilly l
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The load was removed free the plant at 4:15 a.m., on August 11, 1975, and plant cooldovn was co..enced at 11:10 a.u., in preparation for replacer.ent of the faulty scal.
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TAILURE DATA I
M be addressed in the final report.
IRESTICATOR:
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W W E. Denton Director of Office of Nuclear Reactor Regulation ces O.
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