ML20203J815

Forwards Request for Addl Info Re Corrosion Due to Chloride Contamination.Response Requested within 45 Days of Ltr Date

ML20203J815
Person / Time
Site:	Fort Saint Vrain
Issue date:	07/31/1986
From:	Heitner K Office of Nuclear Reactor Regulation
To:	Robert Williams PUBLIC SERVICE CO. OF COLORADO
References
TAC-57248, NUDOCS 8608050434
Download: ML20203J815 (4)

Text

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July 31, 1986 l

Docket No. 50-267 Mr. R. O. Williams, Jr.

Vice President, Nuclear Operations Public Service Company of Colorado Post Office Box 840 Denver, Colorado- 80201-0840

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - FORT ST. VRAIN - CORROSION dud TO CHLORIDE CONTAMINATION The staff has reviewed Public Service Company of Colorado's submittals concerning corrosion due to chloride contamination at Fort St. Vrain, and has determined that additional information is needed to complete this review. The information requested is to supplement your letter dated June 20, 1986 (P-86419) concerning this topic.

Enclosed are three questions that define the additional information needed for this review. We request that you respond to these questions within 45 days of the date of this letter. If you have any questions, please contact Charles Hinson at (301) 492-7930.

The informaticn requested in this letter affects fewer than 10 respondents; therefore, OMB clearance is not required under P. L.96-511.

Sincerely, original signed by Kenneth L. Heitner, Project Manager Standardization and Special Projects Directorate Division of PWR Licensing-B Office of Nuclear Reactor Regulation l

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Enclosure:

As stated

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% ,/ July 31, 1986 Docket No. 50-267 Mr. R. O. Williams, Jr.

Vice President, Nuclear Operations Public Service Company of Colorado Post Office Box 840 Denver, Colorado 80201-0840

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - FORT ST. VRAIN - CORR 0SION DUE TO CHLORIDE CONTAMINATION The staff has reviewed Put'lic Service Company of Colorado's submittals concerning corrosion due co chloride contamination at Fort St. Vrain, and has determined that additional information is needed to complete this review. The .

information requested is to supplement your letter dated June 20, 1986 (P-86419) concerning this topic.

Enclosed are three questions that define the additional information needed for this review. We request that you respond to these questions within 45 days of the date of this letter. If you have any questions, please contact Charles Hinson at (301) 492-7]30.

The information requested in this letter affects fewer than 10 respondents; therefore, OMB clearance is not required under P. L.96-511.

Sincerely, 1

P J t.%1-Kenneth L. Heitner, Project Manager Standardization and Special Projects Directorate Division of PWR Licensing-B Office of Nuclear Reactor Regulation

Enclosure:

As stated l

l cc w/ enclosure:

l See next page i

. Mr. R. O. Williams Public Service Company of Colorado Fort St. Vrain cc:

Mr. D. W. Warembourg, Manager Albert J. Hazle, Director Nuclear Engineering Division Radiation Control Division Public Service Company Department of Health of Colorado 4210 East lith Avenue P. O. Box 840 Denver, Colorado 80220 Denver, Colorado 80201 .

Mr. David Alberstein, 14/159A Mr. J. W. Gahm, Manager GA Technologies, Inc. Nuclear Production Division Post Office Box 85608 Public Service Company of Colorado San Diego, California 92138 16805 Weld County Road 19-1/2 Platteville, Colorado 80651 Mr. H. L. Bray, Manager Nuclear Licensing and Fuel Division Mr. L. W. Singleton, Manager Public Service Company of Colorado , Quality Assurance Division P. O. Box 840 Fort St. Vrain Nuclear Station i Denver, Colorado 80201 16805 Weld County Road 19-1/2 1 Platteville, Colorado 80651 Senior Resident Inspactor U.S. Nuclear Regulatory Commission P. 0. Box 640 . .

Platteville, Colorado 80651 Kelley, Stansfield & 0'Donnell Public Service Company Building Room 900 550 15th Street Denver, Colorado 80202 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Chairman, Board of County Commissioners of Weld County, Colorado Greeley, Colorado 80631 Regional Representative Radiation Programs Environmental Protection Agency 1800 Lincoln Street Denver, Colorado 80203

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Enclosure REQUEST FOR ADDITIONAL INFORMATION - CHLORIDE CORROSION FORT ST. VRAIN (TAC 57248) l In order to complete our evaluation of the documents concerning the chloride corrosion evaluation, the following information is needed:

1. Identify the "certain other elements of the cable assembly that may be susceptible to stress corrosion cracking," mentioned in the GA Technologies Inc. Report 907875, para. 4.6.2.1. Indicate the materials that these "certain other elements" were originally fabricated from,and if the materials were changed, identify the new materials.

2. Was a failure analysis

• and metallographic examination conducted on the H-11 (AMS 6487) primary closure bolts and the A-286 stator hold down bolts? Is so, please provide a copy of the failure analysis.

3. Identify the suppliers of the H-11, A-286 and Inconel 718 bolts, and the methods used to form the threads on these bolts.

• The Failure Analysis should include the following documents:

a. Certificates of Compliance for Materials

b. Inspection Records

c. Procurement Documents

d. Design Requirements and Specifications

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