ML17286B133

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LER 91-027-00:on 910930,question on Jet Operability & Surveillance Applicability in Operational Conditions 1 & 2 Below 25% Rated Thermal Power Raised.Caused by Inadequate Procedure.Ts Amend Request Will Be submitted.W/911106 Ltr
ML17286B133
Person / Time
Site: Columbia Energy Northwest icon.png
Issue date: 11/06/1991
From: John Baker, Swank D
WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GO2-91-204, LER-91-027, LER-91-27, NUDOCS 9111180031
Download: ML17286B133 (7)
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Text

TION SYSTEM REGULATORY INFORMATION DISTRIBUTXON SYSTEM (RXDS)

ACCESSION NBR:9111180031 DOC.DATE: 91/ll/06 NOTARXZED: NO , DOCKET FACIL:50-397 WPPSS Nuclear Project, Unit 2, Washington Public Powe 05000397 AUTH. NAME AUTHOR AFFILIATION SWANK,D.A. Washington Public Power Supply System BAKER)J.W. Washington Public Power Supply System RECIP.NAME RECIPIENT AFFILXATION

SUBJECT:

LER 91-027-00:on 910930,question on jet operability surveillance applicability in Operational Conditions 1 6 6

2 below 254 rated thermal power raised. Caused by inadequate procedure.TS amend request will be submitted.W/911106 ltr.

DISTRXBUTION CODE: XE22D COPIES RECEIVED:LTR Q ENCL SIZE:

TITLE: 50.73/50.9 Licensee Event. Report (LER), IncidentJ Rpt, etc.

NOTES:

RECIPIENT COPIES RECIPXENT COPXES XD CODE/NAME LTTR ENCL XD CODE/NAME LTTR ENCL PD5 LA 1 1 PD5 PD 1 1 ENG, P. L. 1 1 INTERNAL: ACNW 2 2 ACRS 2 2 AEOD/DOA 1 1 AEOD/DSP/TPAB 1 ~

1 AEOD/ROAB/DSP 2 2 NRR/DET/ECMB 9H 1 1 NRR/DET/EMEB 7E 1 1 NRR/DLPQ/LHFB10 1 1 NRR/DLPQ/LPEB10 1 1 NRR/DOEA/OEAB 1 1 NRR/DREP/PRPBll 2 2 NRR/DST/SELB 8D 1 1 NRR/DST/SICB8H3 1 1 N PLB8D1 1 1 NRR/DST/SRXB 8E 1 1 REG 02 1 1 RES/DSIR/EIB 1 1 RGN5 FILE 01 1 "

1 EXTERNAL: EG&G BRYCE,J.H 3 3 L ST LOBBY WARD 1 1 NRC PDR 1 1 NSIC MURPHY,G.A 1 1 NSIC POORE,W. 1 1 NUDOCS FULL TXT 1 1 NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE AVASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 33 ENCL 33

WASHINGTON PUBLIC POWER SUPPLY SYSTEM P.O. Box 968 ~ 3000 George Washington Way ~ Richland, Washington 99352 November 6, 1991 G02-91-204 Docket No. 50-397 Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

NUCLEAR PLANT NO. 2 LICENSEE EVENT REPORT NO.91-027

Dear Sir:

Transmitted herewith is Licensee Event Report No.91-027 for the WNP-2 Plant. This report is submitted in response to the report requirements of 10CFR50.73 and discusses the items of reportability, corrective action taken, and action taken to preclude recurrence.

Very truly yours,

/ . Baker

'W P-2 Plant Hanager

Enclosure:

Licensee Event Report No.91-027 Hr. John B. Hartin, NRC Region V Hr. C. Sorensen, NRC Resident Inspector (H/D 901A)

INPO Records Center Atlanta, GA Hs. Dottie Sherman, ANI Hr. D. L. Williams, BPA (H/D 399)

NRC Resident Inspector walk over copy or<'c:

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~go re l PLiii8003i Piii06 PDR AGOCK 05000397 S PDR

NRC FORM 366 UA. NVCLEAR REGULATORY COMMISSION APPROVED OMB NO. 31504)104 (64)9)

EXPIRES: 4/30/92 ESTIMATED BURDEN PER RESPONSE TO COMPLY WTH THIS INFORMATION COLL'ECTION REQUESTt 50.0 HRS. FORWARD llcENSEE EVENT REPORT tLER) COMMENTS REGARDING BURDEN ESTIMATE TO THE RECORDS AND REPORTS MANAGEMENT BRANCH (P630), U.S. NUCLEAR REGULATORY COMMISSION, WASHINGTON, DC 20555, AND TO THE PAPERWORK REDUCTION PROJECT (3)500104), OFFICE OF MANAGEMENTAND BUDGET. WASHINGTON, DC 20503.

FACII.ITY NAME (Il DOCKET NUMBER (2) PA E 3 Washington Nuclear Plant Unit 2 0 5 0 0 03 7 1 OF TITLE (4)

Jet Pump Operability EVENT DATE (5) LER NUMBER (6) REPORT DATE (7) OTHER FACILITIES INVOLVED (4)

MONTH OAY YEAR YEAR SEQVENTIAL MONTH QAY YFA'R FACILITYNAMES DOCKET NUMBER(SI NVMSEA 0 5 0 0 0 0 9 3 0 91 91 027 00 11 0'691 0 5 0 0 0 OPERATING THIS REPORT IS SUBMITTED PURSUANT T0 THE REQUI AEM ENTB oF 10 cFA (): /cheep one or more ol tne /ollowlnp/ (11 MODE (9) 20.402 Rr) 20AOS(c) 60.73(e) (2) (Ia) 73.71 Qr)

POWER 20AOS( ~ ) (I) (0 50.34( ~ ll'll 50.73(e)(2) (a) 73.71(c)

(10) 0 1 2 20AOS(e) l1) (Sl 50.36(cl(2) 50.73(e) l2) (YB) l2)(a(El(BI OTHER /Specify rn Aor tract trelow end In Text, NIIC Form 20.405(el(1) (SII 50.73(el(2) (Il 60.73(e)(2)(aNI) IA) 3BBA/

20AOS le ) (I) (Ia) 50.73(e l(21(6) 50.73(e) xiK

ÃQk.rj+ 20AOS(e) D)(a) 50.73(e)(2) (ill) 60.73(ell2)(al LICENSEE CONTACT FOR THIS LER l12)

NAME TELFPHONE NUMBER AREA CODE D. A. Swank, Compliance Engineer 50 937 7- 4147 COMPLETE ONE LINE FOR EACH COMPONENT FAILURE OESCAIBEO IN THIS REPORT (13)

AEPORTABLE CAUSE SYSTEM COMPONENT MANUFAC CAUSE SYSTEM COMPONENT MANUFAC. TABLE;+ 'POA TVRER TO NPADS TVAE'A

!@PAYA( TO NPROS m )P.

4!FN~I<k 1%+SYkF VMaVP(9:

SUPPLEMENTAL REPORT EXPECTED llcl MONTH OAY YEAR EXPECTED SUBMISSION DATE (I SI YFS (lf yet, complete EXPECTED SVBMISSION DATE) NO ABSTRACT /Limit to Ie(X) rpecet, l.e., approx/merely li /teen tinpleepece typewr/tran liner/ 114)

On October 15, 1991 it was concluded, based on the results of a Reportability Evaluation, that the previously accepted understanding of Technical Specification requirements for jet pump testing in Mode 2 were not in literal compliance with the Plant Technical Specifications.

On September 26, 1991 at 1636 hours0.0189 days <br />0.454 hours <br />0.00271 weeks <br />6.22498e-4 months <br /> WNP-2 entered Operational Condition 2. At 2338 hours0.0271 days <br />0.649 hours <br />0.00387 weeks <br />8.89609e-4 months <br /> on September 29, 1991 WNP-2 entered Operational Condition l. On September 30, 1991 a question on jet pump operability and surveillance applicability in Operational Conditions 1 and 2 below 25% of rated thermal power was raised. It was concluded after extended evaluation that the Technical Specification requires performance of the testing within 24 hours after entry into Mode 2.

The immediate corrective actions for this event was that plant startup procedures were deviated to require performance of the surveillance procedure within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after entry into Mode 2 but prior to exceeding 255 of rated thermal power.

The root cause for this event was procedures less than adequate/instructions ambiguous. The Technical Specification for jet pumps does not clearly define when operability must be demonstrated. In addition, plant procedures failed to provide sufficient information to clearly define when the Specification is applicable.

This event posed no threat to the health and safety of the public or plant personnel since testing confirmed the operability of the jet pumps.

NRC Form 366 (64)9)

)) ~

NRC FORM 366A (6B9)

LICENSEE EV TEXT CONTINUATION US. NUCLEAR AEGULATOAYCOMMISSION T REPORT (LER) t APPROVEO OMB NO. 31500104 EXPIRES: 4/30/92 ESTIMATED BURDEN PER RESPONSE TO COMPLY WTH THIS INFORMATION COLLECTION REOUESTt 50A) HAS, FORWARD COMMENTS REGARDING BURDEN ESTIMATE TO THE RECORDS ANO REPORTS MANAGEMENT BRANCH IP.530), U.S. NUCLEAR REGULATORY COMMISSION, WASHINGTON, OC 20555. ANO TO 1)IE PAPERWORK REDUCTION PROJECT )31504)04). OFFICE OF MANAGEMENTANO BUDGET,WASHINGTON. OC 20503.

FACILITY NAME 11) DOCKET NUMBER 12) LEA NUMBER )6) PAGE 13) 461~< SEOVCNTIAL Sw5 REVISION t)UMBER ~~+ NVMSBR Washington Nuclear Plant - Unit 2 o s o o'o3 97 1 027 0 00 2 OF TEXT ///moto tptcoit ttOV/)td. Vto tddldoot/N/IC Fomt AC4'4/) IT)

Plant Conditions Plant Node 1 (RUN)

Power Level - 12$

Event Descri tion On October 15, 1991, based on a Reportability Evaluation, it was concluded that failure to perform jet pump operability testing within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of entry into Node 2 constituted a deviation from Technical SpeciFication 3/4,4.1.2. This deviation is reportable pursuant to the requirements of 10 CFR 50.73(a)(i)(b).

On September 26, 1991 at 1636 hours0.0189 days <br />0.454 hours <br />0.00271 weeks <br />6.22498e-4 months <br /> WNP-2 entered Node 2 as part oF a startup following an outage. On September 29, 1991 at 2338 hours0.0271 days <br />0.649 hours <br />0.00387 weeks <br />8.89609e-4 months <br /> the plant entered Node l.

On September 30, 1991 a question on jet pump operability in Nodes 1 and 2 at less than 25K power was raised. Operations personnel stated that the Technical Specifications required the test be performed before the plant exceeded 25K of rated thermal power and every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter. This understanding was based on a careful reading of both the Specification and the technical basis For the test. On October 1, 1991 the jet pump operability test was completed in preparation for raising reactor power above 255.

Upon further evaluation it was concluded in a Reportabi lity Evaluation that a conservative reading of the Specification requires performance of jet pump surveillance testing within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after entry into Node 2. WNP-2 did not perform jet pump testing within the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period allowed following entry into Node 2.

This constituted a deviation from the Technical Specifications and is reportable pursuant to the requirements of 10 CFR 50.73(a)(2)(i)(B).

Immediate Corrective Action Plant startup procedures were deviated to require performance of jet pump operability testing within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after plant entry into Node 2 but prior to exceeding 255 of'rated thermal power.

Further Evaluation and Corrective Action A. Further Evaluation Technical Specification 4.4.1.2.1 states:

Each of the above required jet pumps shall be demonstrated'PERABLE prior to THERMAL POWER exceeding 25'f RATEO THERNAL POWER and at least once per 24 recirculation flow, total core flow and difFuser-to-lower by determining 'ours plenum differential pressure 'for each jet pump ...

N AC Form 366A IBB9)

NRC, FORM 366A U.S. NUCLEAR REGULATORY COMMISSION (689) APPROVEO OMS NO. 31504)104 EXPIRES; 4/30/92 LICENSEE EV IMATEO SURDEN PER RESPONSE TO COMPLY WTH THIS T REPORT (LER) INFORMATION COLLECTION REOUESTI 50.0 HRS. FORWARD COMMENTS REGARDING SUROEN ESTIMATE TO THE RECORDS TEXT CONTINUATION AND REPORTS MANAGEMENTSRANCH IP.530I. U.S. NUCLEAR REGULATORY COMMISSION. WASHINGTON, OC 20555. AND TO 1HE PAPERWORK REDUCTION PROJECT (31504)104I. OFFICE OF MANAGEMENTANO SUDGET,WASHINGTON, DC 20503.

FACILITY NAME (II DOCKET NUMBER (2) LER NUMSER (6) PAGE (3)

~rg SEOVENTIAL:

NVMSER m'EVISION

'C NVMSER Washington Nuclear Plant Unit 2 o s o o o 3 7 9 1 2 7 0 0 0 3oF 0 4 TEXT /I/ mao spsss /4 IPEIRRR/. I/so tR//ioIM//YRCFomI 3SSA'4/ (17)

The Specification is applicable in OPERATIONAL CONDITIONS 1 and 2.

I Plant personnel previously interpreted this Specification as requiring performance of jet pump testing prior to exceeding 255 of rated thermal power and once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter. It is now understood that a literal interp'retation of this Specification requires jet pump testing to be performed within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of entry into Node 2 and every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter, but always prior to exceeding 25K of rated thermal power. The technical value of this test when performed at low power and recirculation flow is minimal due to the low signal-to-noise ratio of the jet pump flow readings. Review of other BWR plant Technical Specifications revealed that the NRC has recently issued amendments to clarify this confusion and to require testing after exceeding 255 power. In addition, the draft NUREG-1434 on improved Standard Technical Specifications also requi res testing after exceeding 25K power.

The plant procedures at the time of discovery did not provide sufFicient guidance for the Operators to conclude that jet pump testing was required within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of entry into Node 2. The procedures and plant practices, however, were adequate to satisfy the previous understanding that testing only need be performed prior to 25M power and every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter.

B. Further Corrective Action

1. In order to ensure that the Technical Specification requirements are met, several procedures will be deviated to provide additional clarification regarding Technical Specification applicability.
2. A Technical Specification Amendment Request wi 11 be submitted to change the SpeciFication to require testing of the jet pumps within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> after exceeding 255 of rated thermal power and every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter.
3. As documented in WNP-2 LER 91-013-02, a guality Action Team has been authorized to address potential improvements in Technical Specification compliance at WNP-2.

Safet Si nificance This event was not saFety signiFicant since the jet pumps were determined, through testing, to be operable. In addition, recent license amendments issued by the NRC support the technical basis for, and require, performance oF jet pump operability testing after exceeding 25K power. The draft NUREG-1434 on improved Standard Technical Specifications also requires jet pump testing after exceeding 255 power.

4 R C FoIRI 366A (6 69l

J'0 t

b

NRCFORM 388A (64)9)

LICENSEE EVENT REPORT (LER)

U.S. NUCLEAR 4EQULATORY COMMISSION 1 APPROVEO OMS NO. 31504)04 EXPIRES: 4/30/92 ESTIMATED BURDEN PER 4ESPONSE TO COMPLY WTH THIS INFORMATION COLLECTION REQUEST: 50.0 H45. FO4WARD COMMENTS REGARDING BURDEN KSTIMATE TO THE RECORDS TEXT CONTINUATION AND REPORTS MANAGEMENTBRANCH IP.530), U.S. NUCLEAA REGULATORY COMMISSION, WASHINGTON, OC 20555, ANO TO 1HE PAPERWORK ABDUCTION PROJECT (31504)104), OFFICE OF MANAGEMENTANO BUDGET.WASHINGTON, DC 20503.

FACILITY NAME Ill DOCKET HUMSEA (2) LER NUMBER (8) PAGE (3)

VKAR SEQUENTIAL REVISION NIJMSBR NUMB~ R I/Iashington Nuclear Plant Unit 2 o s o)o o 027 0 0 0 4 OF 0 4 TEXT /// moie specs/s sod uiisd, p>> sddlo'oval rVRC Fdmr 366A'4/ (17)

Similar Events There have been previous instances nf reportable events resulting From changes in the way a Technical Specification is interpreted. LER 91-002 documented a case where jet pump testing did not meet the requirements imposed by a literal reading of the Techni'cal Specification in that SpeciFication 3.4.1.2 requires jet pump operability testing be performed "when both recirculation loops are operating at the same flow control valve position." The testing had been performed with matching reactor recirculation loop flows instead of matching flow control valve positions.

The procedure was changed to achieve compliance, and a Technical Specification Amendment Request was submitted to allow testing with matching flows. LER 91-013 documented a situation where the Specifications required testing of RTDs and thermocouples. This testing is not physically possible. In response to the Technical Specification deviations identified in 91-013 and other recent LERs, a Quality Action Team will address Technical SpeciFication compliance and methods to ensure compliance.

EIIS Information Text Reference EIIS Reference

~Sstem ~tom onent Jet Pump AD P NAC FOnis 388A (889)

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