ML19031A919
| ML19031A919 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 01/04/1977 |
| From: | Schneider F Public Service Electric & Gas Co |
| To: | O'Reilly J NRC/IE, NRC Region 1 |
| References | |
| LER 1976-024-01 | |
| Download: ML19031A919 (4) | |
Text
Frederick W. Schneider Vice President Public Ser-Vice Electric and Gas Company 80 Park Place Newark, N.J:07101 201/622-7000 Production Mr. James P. O'Reilly Director of USNRC January 4, 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 7G-24/3L Pursuant to the requirements of Salem Generating* Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 76-24/3L.
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) yours;
1--
- "'. ~Report Number:
Report Date:
jir24/3L
!IP122/76 12/13/76:
Occurrence Date:
- Facility Salem Generating Station Public Service Electric.& Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:
Failure of Radiation Monitoring System Channel RllA, Containment/Plant Vent Air Particulate Monitor.
CONDITIONS' PRIOR TO OCCURRENCE:
Mode 2 operation, RCS temperature 547°F, RCS pressure 2235 psig, Low Power Physics Testing in progress.
DESCRIPTION OF OCCURRENCE:
During Mode 2 operation, the Containment/Plant Vent Air Particulate Monitoring Channel RllA failed, indicated by an activation of the Filter Failure Alarm.
The Shift Supervisor implemented Tech Spec Action Statement #20 for.Limiting Condition for Operation No. 3.3.3.1, Table
- 3. 3..,.6.
DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:
After removal.of the low speed drive motor inspection revealed metal filings in the a:i;ea of the opposite drive end bell.
The rotor was fro*zen in place.
The apparent cause of the event was bearing failure.
ANALYSIS OF OCCURRENCE:
The RllA channel was inoperable for a period of less than 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
Tech Spec 3.4w6.l, Action Statement allows operation to continue for up to 30 days' provided that grab samples of the containment atmosphere are taken at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Since the inoperable channel was returned to service in less than 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, the grab sample requirement was not required.
At the time of the occurrence; Channel RllA was selected to monitor the containment atmosphere.
During the time the channel was inoperable, no release was made through the plant vent.
At no_time did the event endanger the general public or site personnel.
CORRECTIVE ACTION:
The low speed filter drive motor was replaced with a spare and a functional test was performed to demonstrate operability.
The channel was then returned to service.
FAILURE DATA: ___ _
Manufacturer:
Barber -
Colman <;:ompany, Rockford, Illinois Model: DJl0-525, 115 VAC, 60 cps, 1152 RPM, 100 in. lb. torque Prepared by B. Canfield
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Manager - Sale SORC Meeting No.
122-76
~~~---~~~~
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CONTROL BLOCK LIC1'NS£E
, NAME
- LICENSEE EVENT REPORT,
I 8
t..ICENSE NUM8ER
- 1.JCENSE TYPe:
!EVENT TYf>t!
[![!] !N I J. I S I G I S I ~!, t5o I O I -1 O I O I O I O I 'f!I -1 O I qJ
~ 41 11 11 11 1:1, W-LlJ CATEGORVA'eo..:T ~5~~I OOCKET NUM8EA,:
!!VIENT CATE REPORT CATE
~.ccN'T~j I OJ *. ~ ~ ~p I 51 0 I -I O I 2171 iJ. * ~.I 2 I 11 3 I 7 I ~J
~; I 21 2 I 11 7 I ~
EVENT DESCRIPTION*
. @]!]I During Mode 2 operation, 7
8 9 low power physic~ testing in progress, a filter I
- @:§]I failure alarm was received on th~ RMS Channel RllA 7
89 so (Containment/Plant. Ve~t
@El Air Particulate).
At the time of this occurrence, 7
8 Channel RllA was
@liJ! selected to monitor the containment atmosphere.
No release from the 7
8 9..
I!]!] I vent was in progress.* No redundancy exists for Channel RllA.
- I&C 7
8 9 SVST£M COCE
@:I!] t.filru T
8 9 10 CAUSE COOE Lm 11 CAUSE DESCRIPTION
. COMPONENT COOE IX !XIX !XIX IX I 12 17 PRIME COMPONENT SUPPl..IEA l1!l 43 COMPONENT MANUFACTURER' IX 19 !9 19 I
- 44.
47 VIOLATION lliJ 48 pla9t 80 1*
80
. ~\\After replacement,of' low speed drive motor, an investigation into the J
@::J!f I failed unit revealed metal filings in the area of the opposite drive end I 7
~9 so
[lfil I bell.
The rotor. was frozen in place.
The cause of this event was bearigg 7
89 so FACll..ITV STATUS
[fill Lal.
1
- a.
9 FOAM.OF
lltPOWl!:A
- 10 !O !O !
10 12 ACTIVITY CONTENT METMOOOF OTHER STATUS OISCOVERV OISCOVERV OESCJUPTION
!~..--*~N_/~A.__ ___ -,-!I
~
- 13.
44*
45 46' 80 RliLEASED OF REl..EAS!E AMOUNT OF ACTIVITY GE l..!J l]J I
N/A 7
8 9
10 11 1..DCATION OF Rltl...EASE I
l _____ __,.__,.__,.N~/~A__,.__,,~---~~'
~
~
- ~
PERSONNEL EXPOSURES NUMSl!:A TVPE 0SCAllJTION 1010101 lZJ l~-----~N~/~A~__,.__,.~__,.----......_~__,.---~--~--.-...,.-ftJ 1
9 11 12 13 SS PERSONNEL INJURIES NUMSE:R OSSCRIPTION
[]E]IOIOIOI 1...,._* _________ N~/_A~------~-------------,--------~---~J 1
a.§ u
12 ao OFFSITE CONSEQUENCES
~l!I N/A J
LOSSOA CAMAGE TO FACIL;ITY TYPI!:
DESCRIPTION*
rle!i;.J
~~o---------------*~N~/A~.*----------------~---------------""""-"DJ PV8LIC1TY
'*[0*.,,__ ________..,...... ____..,........,.........._~~..,........,........,......~~~~~~..,........,........,......~..,........,........,........,.........;..;....,........,......~
7 8 9 BO ADDITIONAL FACTORS
!II!]! EVENT DESCRIPTION AND CAUSE DESCRIPTION (Continued on page 2) 7 8 9 I
80 IIJ!J.,,._..,...... ____..,...... __________..,........,...... __..,...... __________..,...... ____..,........,...... ___________..,...... __ ~--~
1 a a so NAME: _____...__B_. -_E_._C_a_n_f_i_* e_.l_.d ___ _
PHONE: (609) 365-7000 Ext.Salem-525
l;;l
-~ v LER 76-24/31
- 12/21/76 EVENT DESCRIPTION (Continued) personnel were notified.
Investigation revealed a failed low speed filter drive motor.
The low speed drive motor was replaced from spares and a functional check was done to verify operability.
The channel was then returned to service.
Channel down time was less than 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
(76-24/3L).
CAUSE DESCRIPTION (Continued) failure.
This failure is believed to be an isolated case and no remedial action is plann.ed.
Manufacturer:
Model No.:
Barber - Colman Company Rockford, Illinois DJl0-525 115 VAC 1152 RPM 60 cpm 100 in. lb. torque