ML17329A574

Documents Discussions W/Nrc on 920728 Re Mod to TS Change to Allow Interim Plugging Criteria of 1.0 Volt.Understands That NDE Measurement Error & Voltage Growth Data Referenced in Listed Item 2 Are Plant Cumulative Probablistic Values

ML17329A574
Person / Time
Site:	Cook
Issue date:	07/29/1992
From:	Fitzpatrick E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	Murley NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
AEP:NRC:1166D, NUDOCS 9208040019
Download: ML17329A574 (6)

Text

ACCELERATED DISTjUBUTION DEMONST$&TION SYSTEM 4-REGULATE INFORM<ATION DISTRISUTIONSSTEM (RIDE)

ACCESSION NBR:9208040019 DOC.DATE: 92/07/29 NOTARIZED: YES DOCKET FACIL:50-315 Donald C. Cook Nuclear Power Plant, Unit 1, Indiana M 05000315 AUTH.MANE AUTHOR AFFILIATION FIT?f>M'RICK,E. Indiana Michigan Power Co. (formerly Indiana & Michigan Ele RECIP.NAME RECIPIENT AFFILIATION MURLEY Document Control Branch (Document Control Desk)

SUBJECT:

Documents discussions w/NRC on 920728 re mod to TS change to allow interim plugging criteria of 1.0 volt. Understands that NDE measurement error a voltage growth data referenced in listed Item 2 are plant cumulative probablistic values.

DISTRIBUTION CODE: A001D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: OR Submittal: General Distribution NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD3-1 LA 1 1 PD3-1 PD 1 1 STANGFJ 2 2 INTERNAL: NRR/DET/ESGB 1 1 NRR/DOEA/OTSB11 1 1 NRR/DST/SELB 7E 1 1 NRR/DST/SICB8H7 1 1 NRR/DST/SRXB 8E 1 1 NUDOCS-ABSTRACT 1 1 OC L 1 0 OGC/HDS2 1 0 G 01 1 1 RES/DSIR/EIB 1 1 EXTERNAL: NRC PDR NSIC 1 1 NOTE TO ALL "RIDS".RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! 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 16 ENCL 14

Indiana Michigan Power Company P.O. 8ox 16631 Columbus, OH 43216 8

AEP:NRC:1166D Donald C. Cook Nuclear Plant Unit 1 Docket No. 50-315 License No. DPR-58 MODIFICATION TO TECHNICAL SPECIFICATIONS CHANGE TO ALLOW INTERIM PLUGGING CRITERIA OF 1.0 VOLT U. S. Nuclear Regulatory Commission Document Control Desk Washington, D. C. 20555 July 29, 1992

Dear Dr. Murley:

This letter documents discussions held with members of your staff on July 28, 1992. During those discussions, we agreed to accept the following interim plugging criteria conditions that were transmitted to us via telephone. These conditions will be contained in the Technical Specifications amendment safety evaluation report. It is our understanding that the non-destructive examination measurement error and voltage growth data referred to in Item 2 below are Cook Nuclear Plant cumulative probabilistic values.

Interim Plu in Criteria Conditions Determine the end-of-cycle (EOC) voltage distribution in terms of the number of indications falling into each of the following EOC voltage ranges:

< 2.5 volts

> 2.5 to 4 volts

> 4 volts Acceptable methods for determining the EOC voltage distribution include:

1) The methodology described in WCAP-13187. (This involves sampling the cumulative probability distributions of NDE measurement error and of voltage growth during the most recent operating cycle using Monte Carlo techniques and applying the results to the beginning-of-cycle (BOC) voltage distribution.)

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Dr. T. E. Murley AEP:NRC:1166D

2) A simplified approach may be used as an alternative (to the WCAP-13187 approach) provided it provides for a conservative treatment of the tails of the cumulative probability distributions of NDE measurement error and of voltage growth to the lOOX cumulative probability values.

SLB leakage as a function of EOC voltage shall be determined as follows:

EOC Volta e SLB Leaka e

( 2.5 volts 0

> 2.5 volts to 4 volts 1 liter/hour

> 4 volts 10 liters/hour This letter is submitted pursuant to 10 CFR 50.54(f) and, as such, an oath statement is enclosed.

Sincerely, E. E. Fitz atrick Vice President dag CC'. H. Williams, Jr.

A. A. Blind - Bridgman J. R. Padgett G. Charnoff NFEM Section Chief A. B. Davis - Region III NRC Resident Inspector - Bridgman

COUNTY OF FRANKLIN E. E. Fitzpatrick, being duly sworn, deposes and says that he is the Vice President of licensee Indiana Michigan Power Company, that he has read the forgoing Modification to Technical Specifications Change to Allow Interim Plugging Criteria of 1.0 Volt and knows the contents thereof; and that said contents are true to the best of his knowledge and belief.

Subscribed and sworn to before me this day of 1992.

N ARY P BUIC RITA D. HILL NOTARY PUBLIC. STATE OF OHIO

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