ML20132G450

Forwards Safety Evaluation Re Pcrv Prestressing Tendon Wire Corrosion Problems.Submittals & 0614 Acceptably Resolve Concerns.Lasl Evaluation Rept Encl

ML20132G450
Person / Time
Site:	Fort Saint Vrain
Issue date:	07/08/1985
From:	Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
To:	Lee O PUBLIC SERVICE CO. OF COLORADO
Shared Package
ML20132G456	List: ML20132G450 ML20132G476 ML20132G502
References
TAC-54639, NUDOCS 8507190333
Download: ML20132G450 (3)

Text

,

JUL 0 31985 In Reply Refer To:

Docket 50-267 Public. Service Company of Colorado ATTN: 0. R. Lee, Vice President Electric Production P. 0. Box 840 Denver, Colorado 80201

Dear Mr. Lee:

We have completed our review of the various submittals related to the Fort St.

Vrain Prestressed Concrete Reactor Vessel (PCRV) prestressing tendon wire corrosion problems. The results of our review are contained in the attached Safety Evaluation (SE). We have concluded that sufficient' assurance of Safe operation of the PCRV exists to allow the resumption of plant operations, provided the following additional items are implemented:

. 1. Incorporate the modified tendon surveillance program into the Technical Specifications.

2. Provide the NRC with the results of the tendon surveillance program every 6 months, including the results of inspections related to determining whether there is any evidence of anchorage stress washer failure.

We have reviewed your May 20, 1985 (P-85176), and June 14,1985(P-85199) letters and find that your commitments acceptably resolve the above concerns.

We will include the above in the listing of the various PSC commitments which will be confirmed in connection with authorization of plant restart.

We have also enclosed a copy of the evaluation report, prepared by our consultants at the Los Alamos National Laboratory, for your information and comment.

RIV-SPES SPES RPB1 PCWanger/lk REIreTand EHJohnson 7/5/85 1/$/85 g/f/85 0b w rDOCK,,,. , qo S 05000267 PDR )(

L

l l

Public Service Company of Colorado l

-If you have any questions on this subject, please contact the NRC Project

-Manager - P. Wagner - at (817) 860-8127.

Sincerely, e g.-,: r---a cy E, *- . 7." 00 E. H. Johnson, Chief Reactor Project Branch 1

Enclosures:

1. Safety Evaluation

2. LANL Evaluation cc:

Mr. D. W. Warembourg, Manager Nuclear Engineering Division Public Service Company of Colorado P. O. Box 840 Denver, Colorado 80201 Mr.' David Alberstein, 14/159A GA Technologies, Inc.

P. O. Box'85608 San Diego, California 92138 Kelley, Stansfield & 0'Donnell Public Service Company Building 550 15th Street, Room 900 Denver, Colorado 80202 Chairman, Board of County.Com.

of Weld County, Colorado

-Greeley, Colorado' 80631 -

Regional Representative Radiation Programs Environmental Protection Agency 1860 Lincoln Street x Denver, Colorado 80203 Mr. H. L. Brey, Manager '

Nuclear Licensing / Fuels Div.

Public Service Company of Colorado P. O. Box 840 Denver, Colorado 80201 (cont. on next page)

L

l J. W. Gahm, Manager, Nuclear Production Division Fort St. Vrain Nuclear Station 16805.WCR 191 Platteville, Colorado 80651 L. Singleton, Manager, Quality Assurance Division (sameaddress)

Colorado Radiation Control Program Director bec distrib. by RIV:

RPB1- Resident Inspector R. D. Martin, RA SectionChief(SP&ES)

EP&RPB P. Wagner, RPB1 R. Denise, DRS&P RIV File E. Haycraft, DRSP/LA E. Butcher, ORB 3 CPB/NRR H. Thompson, D/DL G. Lainas, DL K. Heitner, ORB 3 J. Taylor, IE E. Jordan, IE G. Lear, SGEB/NRR H. Polk, SGEB/NRR t.