05000311/LER-1981-130, Forwards LER 81-130/03L-0.Detailed Event Analysis Encl

Forwards LER 81-130/03L-0.Detailed Event Analysis Encl

ML20040C945
Person / Time
Site:	Salem
Issue date:	01/15/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20040C946	List: 05000311/LER-1981-130, Forwards LER 81-130/03L-0.Detailed Event Analysis Encl 05000311/LER-1981-130-03, /03L-0:on 811219 & 21,axial Flux Difference Shifted Outside Target Band.Caused by Simultaneous Downward Rod Push & Power Decrease.Flux Stabilized & Action Statement Terminated
References
NUDOCS 8201290398
Download: ML20040C945 (3)

LER-1981-130, Forwards LER 81-130/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111981130R00 - NRC Website

text

O PSEG Put> tic Service Electric and Gas Company P.O. Box 168 Hancocks Bridge, New Jersev 08038 Salem Generating Station January 15, 1982 Mr.

R.

C.

Ilaynes m

~

Director of USNRC T-s Office of Inspection and Enforcement

(

Region 1 631 Park Avenue RECElygo a

6}

Mgg

[

King of Prussia, Pennsylvania 19406

'k fNhf]pgM U

Dear Mr. Ilaynes :

9,\\

ice q

LICENSE NO. DPR-75 DOCKET NO. 50-311 N/

f REPORTABLE OCCURRENCE 81-130/03L Pursuant to the requirements of Salem Generating Station Unit No. 2, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 81-130/03L.

This report is required within thirty (30) days of the occurrence.

Sincerely yours, l

]lffltrw' H.

J.

Midura General Manager -

Salem Operations FD:

al QCC:

Distribution 8201290398 820115 Th e E. e r g'y' P t' hDRADOCK05000

,sm nn,, n y

%b

m e

?eport Number:

81-130/03L Report Date:

01-15-82 Occurrence Date:

12-19-81 and 12-21-81 Facility:

Salem Generating Station, Unit 2 Public Service Electric & Gas Company H acocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Axial Flux Difference - Outside the Target Band.

This report was initiated by Incident Reports81-505, 81-506,81-507, and 81-508.

CONDITIONS PRIOR TO OCCURRENCE:

12-19-81 Mode 1 - Rx Power 50% - Unit Load 580 MWe 12-21-81 Mode 1 - Rx Power 48% - Unit Load 560 MWe DESCRIPTION OF OCCURRENCE:

On four separate occasions, due to Load Rejection Testing, the Axial Flux Difference (AFD) shifted outside the +5% target band.

On December 19, 1981 at 0125, 0623, and 2220 hours0.0257 days <br />0.617 hours <br />0.00367 weeks <br />8.4471e-4 months <br />, during power reductions of 75% to 50%, 75% to 57%, and 85% to 50%, the AFD shifted outside the target band and Action Statement 3.2.1.a.2 d

was entered.

Again, at 2040 hours0.0236 days <br />0.567 hours <br />0.00337 weeks <br />7.7622e-4 months <br />, December 21, 1981, a power-reduction from 85% to 48% shifted the AFD outside the target.

kand and the Action Statement was entered.

This occurrence constituted operation in a degraded mode in accordance with Technical Specification 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

As power decreased, the AFD shifted upward.

At the same time, the rods going in pushed the flux downward, causing the AFD to shift out of the target band.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.2.1.a.2 requires:

Power operation may continue provided the indicated AFD has not been outside of the +5% target band for more than 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> penalty deviation cumulative during the previous 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and the indicated AFD is within the limits shown on Figure 3.2-1.

Otherwise, reduce thermal power within 30 minutes.

LER 130/03L

CORRECTIVE ACTION

After the control rods were in and the flux stabilized, the AFD shifted back into the +5% target band.

At 0148, 0628, and 2248 hours0.026 days <br />0.624 hours <br />0.00372 weeks <br />8.55364e-4 months <br /> December 19, 198T, and 2107 hours0.0244 days <br />0.585 hours <br />0.00348 weeks <br />8.017135e-4 months <br />, December 21, 1981, respectively, Action Statement 3.2.1.a.2 was terminated.

FAILURE DATA:

Not Applicable Prepared By F.

Dickey

//cI h[

GendraY Manager -

Salem Operations SORC Meeting No.

82- 08 v