NOC-AE-02001435, Additional Information Regarding Proposed Changes to Containment Ventilation Isolation TS

Additional Information Regarding Proposed Changes to Containment Ventilation Isolation TS

ML030230445
Person / Time
Site:	South Texas
Issue date:	01/07/2003
From:	Jordan T South Texas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NOC-AE-02001435, STI:31530335
Download: ML030230445 (3)

Text

Nuclear Operating Company South To.s Pro/cctEklcric Gencrabn Stabton P. Box 289 WadsMwrth, TcAs 77483 January 7, 2003 NOC-AE-02001435 10CFR50.90 STI: 31530335 U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852 South Texas Project Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 Additional Information Regarding Proposed Changes to Containment Ventilation Isolation Technical Specifications

Reference:

Letter from J. J. Sheppard to Document Control Desk dated February 14, 2002, "Proposed Change to Containment Purge Radiation Monitoring and Reactor Coolant System Leakage Detection Technical Specifications" (NOC-AE-01001247)

STP Nuclear Operating Company (STPNOC) submitted the referenced proposed amendment, which includes proposed changes to Technical Specification 3.3.2 requirements for Containment Ventilation Isolation Instrumentation (Functional Unit 3.b.4). The proposed changes include a provision for administrative controls to permit containment purge while the required instrumentation is inoperable. In the review of the STPNOC application, the NRC staff requested additional detail with regard to the administrative controls.

The NRC questions and the STP clarifications are provided below.

1. For Action Statement 18.b, administrative controls are proposed for purge valves with one less than the Minimum Channels OPERABLE requirement. Please provide information about these administrative controls.

With one channel out, STP would purge only if necessary, and would limit purge duration. In addition, an operator would monitor radiation levels, with at least one operable channel to provide indication. The operator would be able to manually actuate isolation, in the event that the operable channel failed to actuate on high radiation.

4o1]r-

NOC-AE-02001435 Page 2

2. For Action Statement 18.c, administrative controls with an alternate monitoring capability is proposed for purge valves with two less than the Minimum Channels OPERABLE requirement. Please provide information about the proposed alternate monitoring capability and administrative controls (if different from Action 18-b).

With both channels out, STP would restrict purge as discussed above, and have an alternate method by which to monitor radiation levels. STP is currently considering the possibility of using other installed radiation monitors (such as the unit vent monitor),

however the final determination of the method(s) to be used to provide alternate monitoring has not been made. An action item in the STP Corrective Action Program has been created to track the resolution of this item, which currently has a due date of January 31, 2003. Additionally, STP would maintain the purge valves closed until the alternate monitoring capability was confirmed to be available.

STPNOC requests approval of the proposed amendment by January 31, 2003, to support implementation prior to the Unit 1 spring 2003 outage. STPNOC requests 60 days for implementation of the amendment after it is approved.

If there are any questions regarding the proposed amendment, please contact Mr. A. W. Harrison (361) 972-7298 or me at (361) 972-7902.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on Ja,, 7, 2.oo 3.

"Date 9T'ýJordan Vice President Engineering & Technical Services awh/jrm

NOC-AE-02001435 Page 3 cc:

(paper copy) (electronic copy)

Ellis W. Merschoff A. H. Gutterman, Esquire Regional Administrator, Region IV Morgan, Lewis & Bockius LLP U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 L. D. Blaylock/W. C. Gunst Arlington, Texas 76011-8064 City Public Service U. S. Nuclear Regulatory Commission Mohan C. Thadani Attention: Document Control Desk U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike R. L. Balcom Rockville, MD 20852 Texas Genco, LP Richard A. Ratliff A. Ramirez Bureau of Radiation Control City of Austin Texas Department of Health 1100 West 49th Street C. A. Johnson Austin, TX 78756-3189 AEP Texas Central Company Cornelius F. O'Keefe Jon C. Wood U. S. Nuclear Regulatory Commission Matthews & Branscomb P. O. Box 289, Mail Code: MN16 Wadsworth, TX 77483 C. M. Canady City of Austin Electric Utility Department 721 Barton Springs Road Austin, TX 78704