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Forwards Insp Rept 50-260/89-31 on 890426-0628.No Violations Noted.Open Issues Re Dynamic Model of Reactor Pressure Vessel,Including Internals & Supports,Which Incorrectly Assumed Existence of Seismic Restraints Noted in Rept
	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: IR 05000260/1989031; ML20247H518;
References
	NUDOCS 8907310048
	Download: ML20247H518 (4)
	v • d • e

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                                                         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,
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             Enclosure:
             Inspection Report 50-260/89-31                                                                                                                     )1
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                                                       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 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,2(g) 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 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
            *SEE PREVIOUS ORC FOR CONCURRENCE                                   r   'N                               ~
   OFC :TVA:EB*             :TVA:EB/BC * :TVA: AD/TP * : TVA: AD/P *    : N RR:g A .D /..: : _ _ _ __ _ _ _ _. :: _ _ _ __....
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                                                                              _
   NAME :TCheng:kj          :DTerao         :RCPierson    :SBlack       :BDLi.at ,     :                :
   _____:___________:......_______:___......___:___________:_____...__:_____..___:.._________
   DATE :7/13/89            :7/13/89        :7/ 13/89     :7/13/89      :7/4/8         :                :
                  0FFICIAL RECORD COPY

                                                                                                   - - _ - - _

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       .
              .
                                                       -2-
                Should you have any questions concerning this inspection, please contact us.
                                                     Sincerely,
                                                     B. D. Liaw, Di rector
                                                     TVA Projects Division
                                                     Office of Nuclear Reactor Regulation
                Enclosure:
                Inspection Report 50-260/88-39
                cc w/ enclosure:
                See next page

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   DATE :7//3/89            :7/[b/89            /
                                          :7/l3'89    :7/fy/89      :7/ /89      :           :
                  OFFICIAL RECORD COPY

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ML20247H518

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