ML17278A446

Application for Amend to License NPF-21,changing Limiting Condition for Operation 3.3.7.7 to Allow LPRM Calibr Using Four Detectors in Traversing in-core Probe Sys.Fee Paid

ML17278A446
Person / Time
Site:	Columbia
Issue date:	10/17/1985
From:	Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Butler W Office of Nuclear Reactor Regulation
Shared Package
ML17278A447	List: ML17278A446 ML17278A448
References
GO2-85-729, TAC-59904, NUDOCS 8510220318
Download: ML17278A446 (9)

Text

REGULATO, NFORMATION DISTRIBUTION EM (BIDS)

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AOCESSION NBR:8510220318 DOC.DATE: 85/10/17 NOTARIZED:: YES DOCKET FACIL!50-397 NPPSS Nuclear Projects Unf t 2i Nashington Public Powe 05000397 AUTH, NAME AUTHOR AFFILIATION SORENSENrG.C, Washfngton- Public Power Supply System RECIP, NAMEi RECIPIENT. AFF IL'IATION BUTLERrN,RI Licensing Branch 2 SUBJECTS Appl icatfo for amend to License NPF-21rchan'ging Limiting n

Condition for Operatfon 3,3;7,7 to allow LPRM,calibr using four detec tor s in traversing in core. probe sys,Fee paid, DISTRIBUTION CODE: A001D COPIES RECEIVED:LTR NOTES' TITLE; OR Submittal Gener al Distribution g ENCL'IZEr ~3 05000397

'L! 12'/20/83 REC IP IENT COPIES RECIPIENT- COPIES ID'ODE/NAMEi LTTR ENCL ID CODE/NAME LTTR ENCL' NRR LB2 BC 01 7 ACRS 09 'NTERNALS b 6 ADM/LFMB 0 ELD/HDS2" 1 0 NRR/DE/MTEB'RR/DL/ORAB 1

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TOTAL NUMBER OF COPIES REQUIRED: LTTR 28 ENCL ?5

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Washington Public Power Supply System P.Q. Box 968 3000 George Washington Way Richland, Washington 99352 (509) 372-5000 Docket No. 50-397 October 17, 1985 G02-85-729 Director of Nuclear Reactor Regulation Attention: Mr. W. R. Butler, Chief Licensing Branch No. 2 U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

NUCLEAR PLANT NO. 2 OPERATING LICENSE NPF-21, REQUEST FOR TECHNICAL SPECIFICATION AMENDMEMENT UNDER EMERGENCY CIRCUMSTANCES In accordance with the Code of Federal Regulations, Title 10, Parts 50.90,

2. 101, and 50.91 (a) (5), the Supply System hereby submits an amendment to the WNP-2 Technical Specifications on an emergency basis, as provided for in the regulations. Specifically the Supply System is requesting that the Limiting Condition for Operation 3.3.7.7 be changed (as attached) to allow LPRN calibration under certain conditions using four detectors in the Traversing In-Core Probe (TIP) system versus the five presently required.

The Technical Specification states that the TIP system shall be operable wi th five detectors when calibrating the LPRN detectors. One of the TIP machines is inoperable and Supply System personnel approached the NRC staff (Region V and NRR offices on September 4, and September 5, 1985) with a proposal to allow calibration of LPRNs in the inaccessible strings by the use of base distributions in symmetric strings which are accessible by one of'he remaining 4 operable TIP machines. (With the reactor core operating in an 'A'ype control rod pattern, symmetry exists between strings which are inaccessible and those which are accessible by an operable TIP machine.) Ad Hoc approval was provided by both NRR and Region V.

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MZ. W. R. Butler Page Two October 17, 1985 The administrative process in obtaining this approval has drawn questions and has resulted in the need to change the subject technical specification to re-flect the ability to calibrate using the above methodology. Absent approval of this change on an emergency basis, WNP-2 will be required to remain below 254 power until the inoperable probe is returned to service. Below 25Ã power, reliance on the LPRM calibration is not required.

The Supply System did not foresee the informal approval of the calibration methodology being questioned and was proceeding to process a technical speci-fication amendment change under the normal process. It was not until questions arose on the informal approvals that it became evident that an emergency tech-nical specification change was necessary. We therefore could not reasonably have, infact, submitted our request in a timely manner.

The Supply System has evaluated this request per 10CFR50.92 and determined that it does not involve a significant hazards consideration because it does not:

I) Involve a significant increase in the probability or consequences of an accident previously evaluated because the calibration of LPRMs using symmetri string base distribution provides LPRM data within the normal uncertainty expected for calibrations with all five machines operable. Consequently, this condition will not adversely affect core thermal limit calculations and thus the probability or consequences of an accident, as previously evaluated, are not changed.

2} Create the possibility of a new or different kind of accident than previously evaluated because margins to safety limits, for the core, are not affected.

3} Involve a significant reduction in a margin of safety because calibration of inaccessible LPRM strings using symmetric string base flux distribution data from symmetric strings which are accessible by an operable TIP machine is within the normal uncertainty limits obtained with five TIP machines operable.

It is the Supply Systems intention to return the inoperable TIP to service at the most opportune time. Present conditions in the Pacific Northwest require WNP-2 to remain at power. The inoperable probe will be repaired at the next planned or forced outage or prior to changing to an asymmetric control rod pattern.

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... Yn.. H. R. Butler Page Three October 17, 1985 The Supply System has reviewed this change per 10CFR50.59, and determined that no unreviewed safety questions will result from this amendment. This technical specification change has been reviewed and approved by the WNP-2 Plant Operation Committee (POC) and the Supply System Corporate Nuclear Safety Review Board (CNSRB).

In accordance with 10CFR170.21, an application fee of One hundred fifty dollars (150.00) accompanies this request. In accordance with 10CFR50.91, the State of Washington has been provided a copy of this letter.

Should you have any questions, please contact Mr. P. L. Powell, Manager, WNP-2 Licensing.

Very truly yours, F,', pcs G. C. Sorensen, Manager Regulatory Programs PLP/sis cc: JO Bradfute - NRC WS Chin - BPA C Eschels - EFSEC JB Martin - NRC RV E Revell - BPA NS Reynolds - BLCP8R AD Toth - NRC Site

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STATE OF WASHINGTON ) SubJect. G02-85-729

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COUNTY OF BENTON I, P. L. Powell, being duly sworn, subscribe to and say that I am the WNP-2 Licensing Manager, for the WASHINGTON PUBLIC POWER SUPPLY SYSTEM, the applicant herein; that I have full authority to execute this oath; that I have reviewed the foregoing; and that to the best of my knowledge, information and belief the statements made in it are true.

DATE October 17 , 1985 P. L. Powell, Mana er WNP-2 Licensing On this day personally appeared before me P. L. Powell to me known to be the individual who executed the foregoing instrument and acknowledged that he signed the same as his free act and deed for the uses and purposes therein mentioned.

GIVEN under my hand and seal this day of October , 1985.

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[otary this day, personally appeared WNP-2 Licensing P. L. Powe , nager WNP-2 Lic

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