Letter Sequence Request |
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MONTHYEARML20136F1661985-12-31031 December 1985
Application for Amend to License DPR-34,revising Tech Specs to Incorporate Requirements for Steam Line Rupture Detection/Isolation Sys.Summary of Proposed Changes Encl. Fee Paid
Project stage: Request
ML20136F1911985-12-31031 December 1985
Proposed Tech Specs,Incorporating Requirements for Steam Line Rupture Detection/Isolation Sys.Significant Hazards Consideration & Analysis Value Discussion Encl
Project stage: Other
ML20141N7811986-03-14014 March 1986
Forwards Revs to Steam Line Rupture Detection/Isolation Sys (Slrdis) & Temp Profiles for Current Equipment Qualification Program.Slrdis Redesigned to Include Two Independent Detection,Logic & Actuation Sys
Project stage: Other
ML20197F3671986-05-0707 May 1986
Forwards Request for Addl Info on 860314 Submittal Re Steam Line Rupture Detection & Isolation Sys,For Response within 30 Days of Ltr Date
Project stage: RAI
ML20198P0511986-05-27027 May 1986
Sar:Steam Line Rupture Detection/Isolation Sys
Project stage: Other
ML20198P0351986-06-0404 June 1986
Proposed Tech Specs Incorporating Requirements for Steam Line Rupture Detection/Isolation Sys
Project stage: Other
ML20198P0131986-06-0404 June 1986
Application for Amend to License DPR-34,revising Tech Specs to Incorporate Requirements for Steam Line Rupture Detection/Isolation Sys
Project stage: Request
ML20198N9401986-06-0404 June 1986
Forwards Application for Amend to License DPR-34,revising Tech Specs to Incorporate Requirements for Steam Line Rupture Detection/Isolation Sys.Fee Paid
Project stage: Request
ML20205T6991986-06-10010 June 1986
Responds to 860507 Requests for Addl Info Re 860314 Info on New Steam Line Rupture Detection/Isolation Sys & Temp Profiles for Equipment Qualification Program
Project stage: Other
ML20204E5611986-07-25025 July 1986
Forwards Supplemental Response to 860507 Request for Addl Info Re Steam Line Rupture Detection/Isolation Sys.Listed Surveillance & Testing Requirements Will Verify Sys Operability
Project stage: Supplement
ML20215M9431986-10-27027 October 1986
Forwards Addl Info Re Steam Line Rupture Detection/Isolation Sys Supervisory Capabilities in Response to NRC Concern Re Surveillance Frequencies Specified in 860604 Tech Spec Request & Discussed in 861020 Telcon
Project stage: Other
ML20212A0661986-12-19019 December 1986
Proposed Tech Specs Re Steam Line Rupture Detection/ Isolation Sys
Project stage: Other
ML20212A0561986-12-19019 December 1986
Application for Amend to License DPR-34,changing Tech Specs Re Steam Line Rupture Detection/Isolation Sys
Project stage: Request
ML20212A0391986-12-19019 December 1986
Forwards Application to Amend License DPR-34,changing Tech Specs Re Steam Line Rupture Detection/Isolation Sys
Project stage: Request
ML20207F0281986-12-31031 December 1986
Requests Fr Publication of Notice of Consideration of Issuance of Amend to License DPR-34 & Proposed NSHC Determination & Opportunity for Hearing on 861219 Request Re Requirements for Steam Line Rupture Detection Sys
Project stage: Other
ML20212J3831987-02-26026 February 1987
Safety Evaluation Supporting Amend 50 to License DPR-34
Project stage: Approval
ML20212J3171987-02-26026 February 1987
Amend 50 to License DPR-34,changing Tech Specs Re Steam Line Rupture Detection/Isolation Sys
Project stage: Other
ML20212J2931987-02-26026 February 1987
Forwards Amend 50 to License DPR-34 & Safety Evaluation. Amend Changes Tech Specs Re Steam Line Rupture Detection/ Isolation Sys
Project stage: Approval
ML20212G2131987-02-26026 February 1987
Transcript of 870226 Meeting in Washington,Dc.Pp 1-72. Supporting Documentation Encl
Project stage: Request
ML20214Q5191987-04-0303 April 1987
Forwards EGG-NTA-7564, Evaluation of Confinement Environ Temp Following High Energy Line Breaks Proposed for Fort St Vrain Environ Qualification Program, Technical Evaluation Rept
Project stage: Other
ML20216G9911987-06-24024 June 1987
Supplemental Safety Evaluation Supporting Application for Amend to License DPR-34 Re Tech Specs for Steam Line Rupture Detection & Isolation Sys
Project stage: Approval
ML20216G9511987-06-24024 June 1987
Revised Safety Evaluation Re Steam Line Rupture Detection & Isolation Sys (Slrdis).Slrdis Meets Requirements of 10CFR50, App A,Gdc 20 & GDC 4
Project stage: Approval
ML20216B3191987-06-24024 June 1987
Forwards Revised Safety Evaluation & Supplemental Safety Evaluation Re Steam Line Rupture Detection Isolation Sys & Amend 50 to License DPR-34
Project stage: Approval
1986-05-07
[Table View] |
Text
Public Service ~
_Jia_
c P.o. Box 840 Denver, Co 80201@40 R. F. WALKER PRESIDENT June 4, 1986 Fort St. Vrain Unit No. 1 P-86227 Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555 ATTN: Mr. H. N. Berkow, Director Standardization and Special Projects Directorate Docket No. 50-267
SUBJECT:
Proposed Technical Specification Change - Steam Line Rupture Detection / Isolation System
REFERENCE:
- 1) PSC Letter, Walker to Berkow dated March 14, 1986 (P-86208)
- 2) PSC Letter, Walker to Berkow l
dated December 31, 1985 (P-86456)
Dear Mr. Berkow.
This letter is a submittal of proposed changes to the Fort St. Vrain l
Technical Specifications to incorporate the requirements for the Steam Line Rupture Detection / Isolation System (SLRDIS).
This submittal supercedes the earlier submittal provided in Reference 2.
A SLRDIS System Description and its relationship to equipment qualification efforts at Fort St. Vrain (FSV) is provided in Reference 1.
Public Service Company of Colorado (PSC) requests NRC approval to implement the proposed changes in conjunction with the return to full power operations, after the FSV equipment qualification program has been accepted. Until an SER is issued to release FSV to full power operations, the existing Steam Pipe Rupture Detection System instrumentation remains the approved method for identifying and g
mitigating high energy line breaks.
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8606060206 860404 ADOCKObOOg7 PDR gst 4.uc. vso-@
L
E P-86227 June 4, 1986 is a Summary of Proposed Changes to the existing license. Attachment 2 is the Proposed Changes to the existing license.
The format for additions to the existing license reflect the format being incorporated into the Technical Specification Upgrade Program. contains the Significant Hazards Consideration for the proposed change.
This change does involve an Unreviewed Safety Question in that the probability of an interruption of forced circulation accident (10FC) with fire water cooldown is increased, and the margin of safety in the Technical Specifications relating to prevention of a simultaneous two-loop shutdown has been reduced.
- However, it is deemed to not constitute a significant hazard because a temporary interruption of forced circulation is a recoverable event that is preferable to failure of equipment caused by a harsh environment as a result of a steam leak.
That is, the high heat capacity of the High Temperature Gas Cooled reactor and slow response of fuel temperatures during an 10FC provide ample time to recover from such events. contains the SLRDIS Analysis Value Discussion. Attachment 5 contains the Safety Analysis Report for installation and operation of SLRDIS.
In addition to the instrumentation that is addressed in Attachment 2, SLRDIS actuates various steam and feedwater valves to isolate high energy line breaks.
Existing Technical Specification SR 5.3.4, Safe Shutdown Cooling Valves, presently confirms the operability of all of the valves required for Safe Shutdown Cooling. The surveillance procedures implementing that surveillance requirement will be expanded to include t; sting of those six auxiliary steam valves whose operability is required to preserve or maintain an environment in which the Safe Shutdown Cooling equipment is qualified.
Thus, the existing Technical Specification SR 5.3.4, will not be modified as it is deemed to incorporate the requirements for maintaining Safe Shutdown Cooling capability in the event o' a harsh environment.
In accordance with the provisions of 10CFR170, an application fee of
$150.00 is enclosed.
If you have any questions or comments concerning the enclosed information, please call Mr. M. H. Holmes at (303) 480-6960.
Very truly yours, k3 W ador R. F. Walker President RFW/ REC / paw Attachments cc: Albert J. Hazie Colorado Department of Health
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