ML20199J026

Requests Addl Info Re Structural Evaluation of Bldg 10 & Walkover Structure,Discussed at 860423 & 24 Meetings.Ltr Inadequately Addressed NRC Concerns

ML20199J026
Person / Time
Site:	Fort Saint Vrain
Issue date:	06/25/1986
From:	Heitner K Office of Nuclear Reactor Regulation
To:	Walker R PUBLIC SERVICE CO. OF COLORADO
References
TAC-55287, NUDOCS 8607080082
Download: ML20199J026 (4)

Text

. .

je = coq)g e UNITED STATES 7, NUCLEAR REGULATORY COMMISSION

[ WASHINGTON, D. C. 20555

$ :j

%,,,,,# June 25, 1986 Docket No. 50-267 Mr. R. F. Walker, President Public Service Company of Colorado Post Office Box 840 Denver, Colorado 80201-0840

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - STRUCTURAL EVALUATION OF FORT ST. VRAIN (FSV) BUILDING 10 AND WALK 0VER STRUCTURE

Reference:

Public Service Company of Colorado (PSC) Letter, Warembourg to Berkow, dated 5/12/86 (P-86240)

In the Safety Evaluation (SE) for the FSV Building 10 structural evaluation, transmitted to PSC on February 19, 1986, the staff identified

. two concerns regarding the potential for impact between the Walkover Structure and Building 10.

I At a meeting held at FSV on April 23 and 24, 1986, PSC made presentations on the Building 10-Walkover Structure impact issue. The subjects discussed were:

Seismic modeL used for Building 10; Soil structure interaction at Building 10; q Structure-soil-structure interaction between Building 10-Walkover y Structure and Turbine Building; 1

I Differential displacement calculations between adjacent buildings; Evaluation of checker plate gaps and Building 10 step structure.

At this meeting, PSC agreed to provide a formal submission of the analyses performed on these topics for NRC staff review. In the reference letter, PSC responded to the two concerns raised in the February 1986 SE.

Unfortunately, it is the staff's position that this response does not I adequately address our concerns. Within 45 days of the date of this letter, please provide the detailed analyses as agreed upon at the FSV meeting so that the staff may complete its review of this issue. Should there be any questions regarding the above, please contact Charles S. Hinson, on (301) 492-7930.

l l

l 8607090082 360625

PDR ADOCK 05000267 p PDR

• ' June 25, 1986 Mr. R. F. Walker The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten 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 cc: See next page DISTRIBUTION:

'. Docket File: J NRC PDR~~

Local PDR SSPD Reading PNoonan CHinson KHeitner Olynch HBerkow ,/

RRothman

SSPD DP & B:SSPD DPWRL-B:SSPD DP'4 L-B:SSPD DPWRL-B:SSPD CH4KMn XHeitner 0 HBerkow y

/86 06/23/86 06/%/86 06 /86 06/1 5/86

. ,s .

O s Mr. R. F. Walker The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely, Kenneth L. Heitner, Project Manager Standardization and Special Projects Directorate Division of PWR Licensing-B cc: See next page t

l l

j Mr. R. F. Walker 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. Brey, 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 Denver, Colorado 80201 16805 Weld County Road 19-1/2 Platteville, Colorado 80651 Senior Resident Inspector 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 l

,. ,. - -- --,n - -,--,.,n,,,- . ., - -- ,_. -.c.,..nc.---,,,-,,-,. --- ,.--