ML20247H518
| ML20247H518 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 07/17/1989 |
| From: | Liaw B Office of Nuclear Reactor Regulation |
| To: | Kingsley O TENNESSEE VALLEY AUTHORITY |
| Shared Package | |
| ML20247H523 | List: |
| References | |
| NUDOCS 8907310048 | |
| Download: ML20247H518 (4) | |
See also: IR 05000260/1989031
Text
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l 7,i !j WASHING TON, D. C. 20555 , l ..... . July 17- 1989 Docket No.'50-260 Mr. Oliver D. Kingsley, Jr. Senior.Vice President, Nuclear Power . Tennessee Valley Authority 6N 38A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801 Dear Mr. Kingsley: SUBJECT: NRC INSPECTION REPORT NO. 50-260/89-31 This letter forwards a report on the results of a special inspection of the Browns Ferry Nuclear Plant Unit 2 (BFN-2) Seismic Design Program conducted by the NRC staff'at Bechtel Power Corporation's (BPC) office in San Francisco, California, at General Electric Company's (GE) office in San Jose, California, dnd at NRC's office in. Rockville, Maryland, from April 26 through June 28, 1989. The three design areas reviewed during this inspection period involved: (1) the seismic analysis of tY reactor building including the reactor pressure vessel (RPV), RPV support, and RPV internals, (2) the procedures for transfer- ring the seismic loads from BPC to GE, and (3) the evaluation of the primary components of the nuclear steam supply system. During this inspection, three open issues as documented in the conclusion of the enclosed Inspection Report were identified. Among these three open issues, .the concern of the dynamic model of the RPV including internals and supports which incorrectly assumed the existence of seismic restraints at the lower end of the control rod drive housings was classified as an Unresolved Item (URI 89-31-01). The staff recognizes that corrective action for resolving this URI is being taken by TVA. However, due to the significance of this finding, it is being reviewed for potential enforcement action. You will be notified by separate correspondence'of our decision regarding this matter. In accordance with Section 2.790 of the NRC's " Rules of Practice," Part 2 Title 10, Code of Federal Regulations, a copy of this letter and its enclosure will be placed in the NRC Public Dacument Room.
Should you have any questions concerning this inspection, please contact us. Sincerejy, < ,p;.- . %q g m., - , . _ _ 8907310040 BNk260 . D. Cta ~~ Director ~ PDR ADDCK o PNV TVA Projects Division J G Office of Nuclear Reactor Regulation ) Enclosure: Inspection Report 50-260/89-31 1 cc w/ enclosure: OFOI ] See next page 'j ) t
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- . , ' Docket No. 50-260 , July 17, 1989 . ' Mr. Oliver D. Kingsley, Jr. . Senior Vice President _ Nuclear Power . Tennessee Valley Authority 6N 38A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801 . Dear Mr. Kingsley: SUBJECT: NRC INSPECTION REPORT N0. 50-260/89-31 This letter forwards a report on the results of a special inspection of the Browns Ferry Nuclear Plant Unit 2 (BFN-2) Seismic Design Program conducted by the NRC staff at Bechtel Power Corporation's (BPC) office in San Francisco, California, at General Electric Company's (GE) office in San Jose, California, and at NRC's office in Rockville, Maryland, fror %pril 26 through June 28, 1989. The three design areas reviewed during his inspection period involved: (1) the seismic analysis of the reactor buildin including the reactor pressure vessel (RPV), RPV support, and RPV internals, (g) the procedures for transfer- 2 ring the seismic loads from BPC to GE, and (3) the evaluation of the primary components of the nuclear steam supply system. During this inspection, three open issues as documented in the conclusion of the enclosed Inspection Report were identified. Among these three open issues, the concern of the dynamic model of the RPV including internals and supports which incorrectly assumed the existence of seismic restraints at the lower end of the control rod drive housings was classified as an Unresolved Item (URI 89-31-01). The staff recognizes that corrective action for resolving this URI is being taken by TVA. However, due to the significance of this finding, it is being reviewed for potential enforcement action. You will be notified by separate correspondence of our decision regarding this matter. In accordance with Section 2.790 of the NRC's " Rules of Practice," Part 2, Title 10, Code of Federal Regulations, a copy of this letter and its enclosure will be placed in the NRC Public Document Room. A Should you have any questions concerning this inspection, please contact us. Sincerely, original signed by B. D. Liaw, Director TVA Projects Division Office of Nuclear Reactor Regulation Enclosure: Inspection Report 50-260/89-31 cc w/ enclosure: See next page
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0FFICIAL RECORD COPY
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