05000272/LER-2077-032-01, Inadequate Air Flow Through No. 11 HEPA Train
| ML19031B564 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 05/13/1977 |
| From: | Schneider F Public Service Electric & Gas Co |
| To: | O'Reilly J NRC/IE, NRC Region 1 |
| References | |
| LER 1977-032-01 | |
| Download: ML19031B564 (4) | |
| Event date: | |
|---|---|
| Report date: | |
| 2722077032R01 - NRC Website | |
text
Frederick W. Schneider Vice President Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 201/622-7000 Production Mr. James P. O'Reilly Director of USNRC Off ice 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 77-32/03L May 13, 1977
- \\
Pursuant to the requirements of Salem Generating Station un*i t No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 77-32/03L.
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, l
Report Number:
.I
~epor-t Date:
Occurrence Date:
Facility:
e-32/03L 5/4/77 4/25/77 Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:
No. 11. HEPA Exhaust Filter Air Flow less than allowed by Technical Specification.
CONDITIONS PRIOR TO OCCURRENCE:
Unit in Mode 1 DESCRIPTION OF OCCURRENCE:
At 1230 hours0.0142 days <br />0.342 hours <br />0.00203 weeks <br />4.68015e-4 months <br />, during testing on the Auxiliary Building Exhaust system, it was found that the air flow through NG. 11 HEPA filter was 14,877 cfm.
Technical Specifications require 21,400 cfm + 10%.
Action Statement (a) for LCO 3.7.7.1 was implemented.
DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:
Low air flow was caused by hi differential pressure across the 11 filter train roughing filters.
No. 13 damper was also slightly out of adjustment.
ANALYSIS OF OCCURRENCE:
Technical Specification 3.7.7.1 allows 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to restore an inoperable HEPA filter train.
No. 11 HEPA train was returned to service within the allowed time.
At no time was there any danger to the general public or site personnel.
CORRECTIVE ACTION
All roughing filters damper was adjusted.
the Tech Spec value.
on.4/26/77.
FAILURE DATA:
Not Applicable in the No. 11 filter train were replaced.
No. 13 Air flow was then measured and found to be within The.Action Statement was* terminated at 0030 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> Prepared by T. Spencer Manager -
Sale'IIlGeilerating Station SORC Meeting No. ~~~~~~~~-
48-77
LER 77~32/03L 5/4/77 LICENSEE EVENT REPORT CONTROL BLOCK LICENSEE NAME REPORT REPORT CATEGORY Tvn SOURCE 6
LICENSE NUMBER COCKET NUMBER LICENSE TVP£ EVENT CATE EVENT TVPE REPORT CATE
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~p I 51 0 I -I 0 I 2 I 71 2J 1014121517171 69 74 I 0 15 I 0 14 17 !7J 75 EVENT OESCAIPTlON
@:§]I During Mode 1 operation, it was discovered that air flow through No. 11 7
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@:I!l HEPA train was less than required by Tech Specs.
No. 12 HEPA train was 7
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@El operable but air flow does not meet minimum requirements.
Rd.ughing 7
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[fil!JI were replaced and damper adjusted.
This is the first occurrence of 7
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(77-32/03L) 7 8 9 SYSTEM COCE
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CAUSE
COCE L£J 11 CAUSC CESCAIPTION COMPONENT COCE I F I I I L I T I EJ_ RI 1'2 17 PRIME COMPONENT SUP9UER l1!..I 43 COMPONENT MANUFACTURER IZ 19 19 I 91 4"
47 VIOLATION lNJ 48 this I eo r eo
~I Dirt on roughing filter caused hi differential pressure-and low air flow. I
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No. 13 damper also required slight adjustment.
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