ML19031A912
| ML19031A912 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 02/25/1997 |
| From: | Schneider F Public Service Electric & Gas Co |
| To: | O'Reilly J NRC/IE, NRC Region 1 |
| References | |
| LER 1977-009-01 | |
| Download: ML19031A912 (4) | |
Text
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Frederick W. Schneider President Public Service Electric and Gas Company 80 Park P!ace Newark. N.J. 07101 201 /622-7000 Production Mr. James P. O'Reilly Director of USNRC Office of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia; Pennsylvania 19406
Dear Mr. O'Reilly:
LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 77-09/3L February 25, 1977 i:iursuant to the requirements of Salem Genera t'ing Station Unit No. 1 Technical Specifications, Section ~.9.1, we are submitting Licensee Ev~nt Report for Reportable Occurrence 77-09/3L.
This report is required within thirty (30) days of the occurrence.
CC:
Director, Office of Inspection and Enforcement (30 copies)
Director, Office of Management Information and Program Control (3 copies)
Sincerely yours, 2453
. I I
Report Number:-
Report Date:
Occurrence Date:
Facility" 77'-09/3L 2/3/77 1/28/77 Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey.08038 IDENTIFICATION OF OCCURRENCE:
No. 12 Containment Fan Coil Unit Inoperable CONDITIONS PRIOR TO OCCURRENCE:
Operational Mode 1, Reactor Power 29.5%, Generator Output: 275 MWe DESCRIPTION OF OCCURRENCE:
At 1400 on 1/28/77,.No. 12 Containment Fan Coil Unit was declared in-operable due to an_ erroneous High Radiation Alarm on No. 12 Containment F.C.U. service water outlet.
Technical Specification Action Statement for L.C.O. 3.6.2.3 was initiated and No. 12 C.F.C.U. was taken out of service.
DESIGNATION:op AP~ARENT CAUSE OF OCCURRENCE:
The High Radiation Alarm on the service water outlet was caused by a high humidity condition in the area of the radiation monitors.
Noisture collected in the monitor housing resulting in high voltage spikes to ground which tripped the alarm.
Upon actuation of the alarm, the service water was automatically isolated.
ANALYSIS OF OCCURRENCE:
Technical Specification Action Statement for L.C.O. 3.6.2.3 states that with one group of containment cooling fans inoperable, restore the inoperable fan group to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in Hot Shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
No. 12 Containment F.C.U. was declared operable within two hours, therefore, the Technical Specifica-tions were not violated.
At no time was there any danger to the health and safety of the general public or site personnel.
CORRECTIVE ACTION:
The radiation monitor was disassembled sufficiently to completely dry out the internal components.
It was reassembled and the case resealed.
The ventilation system for the 78' elevation north penetration was checked and a damper ~as found stuck in the shut position.
The damper was freed and properly positioned, which returned the 78' elevation envir0nmcnt to normal.
Report No. 77-09/3L.
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FAILURE DATA:
This is the first occurxt,;nce of this type.
Detector ~8Sel MD-50
- Trepelo,
'~:J.:>..l tham, Mass.
Prepared by~~~A_.~K_a_p~p_l~e~~~
Manager -
SORC Meeting No. ~~~~~~~~
14-77 2/3/77*
Generating Station
LICENSEE EVENT REPORT CONTROL BLOCK I
6
. LICENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE REPORT REPORT CATEGORY TVFE SOURCE DOCKET NUMBER EVENT CATE REPORT OATE IOl'11 cowqp Io I L1J.LIJ I 0 I 51 O I -I 0 I 21 71 2J
~ :u. 5a 59 60 61 1011121817171 101210131711J 69 74 75 EVENT DESCRIPTION
@:ill I During Mode 1 7
8 9 operation, an erroneous high radiation alarm initiated autq-oo
- 12 Containment Fan Coil Unit.
@]!! matic isolation of the service water for
- 1. 89
@El No. 11,13,14 & 15.Containment F.C. Units were operable during this occuri 7
8
~I rence.
7 B 9 The radiation monitor was cleaned and resealed.
This is the
~I first occurrence of this type. (77-09/JL).
7 8 9 PRIME SVSTE~..! CAUSS:
COMPONENT coce:
cooi::
COMPONENT CODE SUPPLIER
@TIJ!SIBI ~ IIINISITIIS..lJLJ llJ 7
8 9 10 11 12 17 43 CAUSE DESCRIPTION COMPCNENT MANUFACTURER IT 13 I 0 10 I 44
<47 VIOLATION lNJ 48 I
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eo
~I High humidity in monitor area caused high *voltage arcing and erroneous.
~i9readings. A stuck damuer in so ventilation system restricted air flow in th4
. 1 8 9 ITifil I monitor area. The detectors are not hermetrically_sealed to operate so unde4 00 1
8 9 FACll.. 1TV STATUS
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(El.
1 a
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FORl1d-OF
'foPOWER 10 1219 I 10 12 METHOOOF OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION
- 1..... _
__.N__./-=A~ _ __,I Lill lJ 44 45 N/A 80 ACTIVllV CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY liliJ
~ lE.j I
N/A LOCATION OF RELEASE I
l.,.,,_ _______. __
......_:.N~/~A.__ ________ ~,
7 8
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10 11
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00 PERSONNEL EXPOSURES Nt;!o:BER TYPE OESCRIPTION
~I 0 10 IO I 1..ZJ I
. N/A j
7 8 9.
11 12
~13;-----...=..;;~"'--------------------------,60~
PERSONNEL INJURIES NU?.t<SER OESCRIPTION
1 a 9
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':".12,.--------~---------------------------.Jao OFFSITC CONSEQUENCES
~19 N/A LOSSOA OAMAGE TO FACILITY
~TYPE OESCRIPTION 1 st;-! *.\\~o,------------~N~/~A"'------------~-------------------.-.-.J PUBLICITY
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1 8~9-------------.J.lY-'~-------~-~------~---------~--ao~
AOOITt<ONAL FACTORS EID fC.AUSE DESCRIPT. (Continued) thc>se conditions.* Detector Model ~ID-50 I
1 e9 ao Effi !Trepelo, Waltham, Hnss.
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NAME=-~~~-A~*~K_a~p~p-l~c~~~~~~~---
PHONE: ( 6 09) 3 6 5-7 000 Ext. Salem-5 2 B