ML20197G505
| ML20197G505 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 12/18/1997 |
| From: | Graham P NEBRASKA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-84-09, GL-84-9, NLS970220, NUDOCS 9712310039 | |
| Download: ML20197G505 (3) | |
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- NLS970220 December 18,1997-U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001 Gentlemen:
Subject:
Clarification ofInformation Standby Nitrogen Injection System Cooper Nuclear Station, NRC Docket 50-298, DPR-46
Reference:
- 1. Letter to Document Control Desk (USNRC) from G. A. Treavors (NPPD) dated September 28,1989," Post Accident Combustible Gas Control"
Reference:
- 2. Letter to Document Control Desk (USNRC) from G. A. Treavors (NPPD) dated July 13,1990," Standby Nitrogen Injection Systerr."
Reference:
- 3. Letter to G. R. Horn (NPPD) from H. Rood (USNRC) dated November 19, fj 1992," Cooper Nuclear Station - Generic Letter 84-09, Recombiner Capability Requir ments of10 CFR 50.44" gjf)/
By letter dated September 28,1989 (Reference 1), Nebraska Public Power District (Disdct) provided conceptual system design information to supply nake-up nitrogen to the primary containment for post-accident combustible gas contro!. By letter dated July 13,1990 (Reference 2), the D: strict provided confirmation that this system, designated as Standby Nitrogen Injection (SBN1), installation was complete. Detai!cd informatioa in this correspondence stated that the control stations for the SBNI system were located outside the Reactor Building. This information was utilized in the preparation of the Safety Evaluation for the District's Response to Generic Letter 84-09, enclosure to letter dated November 19,1992 (Reference 3).
The information supplied in Reference 1 and 2 should have stated that the control stations for the SBNI system are located outside of Secondary Containment. The control station for SBNI Train A is located inside the. Reactor Bui ding in the vestibule of the former Reactor Building south airlocka The vestibule exterior walls and the interior door to the airlock are maintained and tested as Secondary Containment 'ooundaries. During abro.nal conditions, the Secondary Cont.inment boundary will be maintained at the int,erior door of the airlock. Therefore, the
. tissumptions used in generating the Safety Evaluation for the District's Reply to Generic Letter 9712310039 971218 "
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Page 2 of 2 84-09 are not impacted as all identified operator actions associated with initiation of the SBNI system can be accomp.ished without breaching the Secondary Containment Boundary.
Should you have any questions concerning th!' matter, please contact me.
Sincerely, Pb TJ~9-P. D. Graham Vice President of Nuclear Energy
/rar cc: Regional Administrator USNRC - Region IV Senior Project Manager
- USNRC - NRR Project Directorate IV-1 Senior Resident inspector USNRC NPG Distribution
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' ATTACHMENT 3 LIST OF NRC COMMITMINTS l
2 Correspondence Not NLS970220 The following table identifies those actions committed to by the District in this document. Any other actions discussed in the submittal represent intended or planned actions by the District.
They are described to the NRC for the NRC's information and are not regulatory commitments.
Please notify the Licer. sing Manager at Cooper Nuclear Station of any questions regarding this document or any associated regulatory commitments.
COMMITTED DATE COMMITMENT Oh OUTAGE None gfg l
PROCEDURE NUMBER 0.42 l
REVISION NUMBER S l
PAGE 9 OF 13 l