ML20151M148
| ML20151M148 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 07/21/1988 |
| From: | Heitner K Office of Nuclear Reactor Regulation |
| To: | Robert Williams PUBLIC SERVICE CO. OF COLORADO |
| Shared Package | |
| ML20151M154 | List: |
| References | |
| TAC-56565, NUDOCS 8808040353 | |
| Download: ML20151M148 (4) | |
Text
,-
July 21,1988 g
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-Olc0
Dear Mr. Williams:
SUBJECT:
TECHNICAL SPECIFICATION UPCRADE PROGRAM (TAC NO. 55565)
We have reviewed certain items of your letter dated February 28,1986(P-80169) concerning the Fort St. Vrain (FSV) Technical Specification Upgrade Program (TSUP). This review focused on the need for redundant equipment to mitigate the rapid de::ressurization accident. The rapid depressurization accident is also k10wn as Design Basis Accident No. 2 (DBA-2).
The staff was assisted in this review by its contractor, Oak Ridge National Laboratory (ORNL). ORNL was assisted by a subcontractor, Science Applications International Corporation (SAIC). The Technical Evaluation Reports (TER's) produced by ORNL and SAIC are enclosed.
The key conclusions from the ORNL and SAIC TER's are as follows:
The probability of DBA-2 followed by core damage is low compared to other reactor accident sequences, and With the current reactor power level limits, the fully redundant class 1E system can respond to the DBA-2 with a small amount of fuel damage (less than one percent).
Based on these findings, the staff concludes there is no need to increase the redundancy requirements of FSY's Technical Specifications. Therefore, the staff concludes that your proposals for redundancy requirements to respond to e
DBA-2 are acceptable.
Our Safety Evalu6 tion is enclosed.
Sinc rely, SS Kenneth L. Heitner, Project Manager Project Directorate - IV Division of Reactor Projects - III, m
to o IV, V and Special Projects 88
Enclosure:
i gc As stated 1(0\\
o cc w/ enclosure:
51 88 See next page
'(t
- 11 DISTRIBUTION eDocket F.11e. i NRC PDR & Local PDR PD4 R/F LRubenstein JCalvo PNoonan KHeitner 0GC-Rockville EJordan B.~ Grimes ACRS(10)
PD4 Plant File EButcher RBarnett S. Diab J. Miller PD4/LANN PD4/PM PD4/D p
PNoonan b
KHeitner:sr JCalvoN l
07/L)/88 07/D /88 07/f(/88 i
9
- 1 y July 21,1988 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
Dear Mr. Williams:
SUBJECT:
TECHNICAL SPECIFICATION UPGRADE PROGRAM (TAC NO. 56565)
We have reviewed certain items of your letter dated February 28,1986(P-80169) concerning the Fort St. Vrain (FSV) Technical Specification Upgrade Program (TSUP). This review focused on the need for redundant equipment to mitigate the rapid depressurization accident. The rapid depressurization accident is also known as Design Basis Accident No. 2 (DBA-2).
The staff was assisted in this review by its contractor, Oak Ridge National Laboratory (ORNL). ORNL was assisted by a subcontractor, Sciu1ce Applications International' Corporation (SAIC). The Technical Evaluation Reports (TER's) produced by ORNL and SAIC are enclosed.
The key conc.lusions from the ORNL and SAIC TER's are as follows:
The probability of DBA-2 followed by core damage is low compared to other reactor accident sequences, and With the current reactor power level limits, the fully redundant class 1E system can respond to the DBA-2 with a small amount of fuel damage (less than one percent).
Based on these findings, the staff concludes there is no need to increan the redundancy requirements of FSV's Technical Specifications. Therefore, tne staff concludes that your proposals for redundancy requirements to respond to DBA-2 are acceptable.
Our Safety Evaluation is enclosed.
Sinegrely, l
IS Kenneth L. Heitner, Project Manager Project Directorate - IV Division of Reactor Projects - III.
IV, Y and Special Projects
Enclosure:
As stated cc w/ enclosure:
See next page DISTRIBUTION Docket File NRC PDR & Local PDR PD4 R/F LRubenstein JCalvo PNoonan KHeitner OGC-Rockville EJordan B.13 rimes ACRS(10)
PD4 Plant File EButcher RBarnett S. Diab J. Miller PD4/LA M PD4/PM JCalvoNp PD4/D PNoonan KHeitner:sr 07/u/88 07/2; /88 07/(/88
[#
e UNITED STATES NUCLEAR REGULATORY COMMISSION g
., j WASHING TON, D. C. 20655
,/
July 21,1988 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
Dear Mr. Williams:
SUBJECT:
TECHNICALSPECIFICATIONUPGRADEPROGRAM(TACNO.56565)
We have reviewed certain items of your letter dated February 28,1986(P-80169) concerning the Fort St. Vrain (FSV) Technical Specification Upgrade Program (TSUP). This review focused on the need for redundant equipment to mitigate the rapid depressurization accident. The rapid depressurization accident is also knownasDesignBasisAccidentNo.2(DBA-2).
The staff was assisted in this review by its contractor, Oak Ridge National Laboratory (ORNL). ORNL was assisted by e subcontractor, Science Applications International Corporation (SAIC). The Technical Evaluation Reports (TER's) produced by ORNL and EAIC are enclosed.
The key conclusions from the ORNL and SAIC TER's are as follows:
The probability of DBA-2 followed by core damage is low compared to other reactor accident sequences, and With the current reactor power level limits, the fully redundant class IE system can respond to the DBA-2 with a small amount of fuel damage (less than one percent).
Based on these findings, the staff concludes there is no need to increase the redundancy requirements of FSV's Technical Specifications. Therefore, the staff concludes that your proposals for redundancy requirements to respond to DBA-2 are acceptable.
Our Safety Evaluation is enclosed.
Sincerely, Kenneth L. Heitner, Project Manager Project Directorate - IV Division of Reactor Projects - III, IV, V and Special Projects
Enclosure:
As stated cc w/ enclosure:
See next page
a
'O a
Mr. R. O. Williams, Jr.
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 Averue P. O. Box 840 Denver, Colorado 80220 Denver, Colorado 80201-0840 Mr. David Alberstein, 14/159A Mr. R. O. Williams, Jr., Ai: ting Manager GA Technologies, Inc.
Nuclear Production Division' Post Office Box 85608 Public Service Company of Colorado San Diego, Califorria 92138 16805 Weld County Road 19-1/2 Platteville, Colorado 80651 Mr. H. L. Brey, Manager Nuclear Licensing ard Fuel Division Mr. P. F. Tomlinson, Manager Public Service Company of Colorado Ouality Assurance Division P. O. Box 840 Public Service Company of Colorado Denver, Colorado 80201-0840 16805 Weld County Road 19-1/2 Platteville, Colorado 80651 Senior Resident Inspector U.S. Nuclear Pegulatory Comissier Mr. R. F. Walker P. O. Box 640 Public Service Company of Colorado Platteville, Colorado 80651 l'est Office Box 840 Denver, Colorado 80201-0840 Kelley, Stansfield & 0'Donnell Public Service Company Building Comitme'1t Control Progran Room 900 Coordinator 550 15th Street Public Service Company of Colorado Denver, Colorado 80202 24?O W. 26th Ave. Suite 100-0 Denver, Colorado 80211 Regional Administrator, Region IV U.S. Nuclear Regulatory Comission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Chairman, Board of County Comissioners of Weld County, Colorado Greelay, Colorado 80631 Regional Representative Padiation Programs Environmental Protection Agency 1 Denver Place 999 18th Street, Suite 1300 Denver, Colorado 80202-2413