L-88-020, GL-88-020, Supplement 4, Individual Plant Examinations of External Events for Severe Accident Vulnerabilities - 10 CFR 50.54(f)
| ML080020323 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 06/29/1995 |
| From: | Shell R Tennessee Valley Authority |
| To: | Document Control Desk, Office of Nuclear Regulatory Research |
| RES-Library | |
| References | |
| GL-88-020, Suppl 4 NUDOCS 9507060191 | |
| Download: ML080020323 (3) | |
Text
Tennessee Valley Authority. Post Office Box 2000. Soddy-Daisy, Tennessee 37379 June 29, 1995 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:
In the Matter of
)
Docket Nos. 50-327 Tennessee Valley Authority
)
50-328 SEQUOYAH NUCLEAR PLANT (SQN) - GENERIC LETTER (GL) 88-20, SUPPLEMENT NO. 4, "INDIVIDUAL PLANT EXAMINATIONS OF EXTERNAL EVENTS (IPEEE) FOR SEVERE ACCIDENT VULNERABILITIES -
10 CFR 50.54(f)"
Reference:
TVA letter to NRC dated September 18, 1992 The purpose of this letter is to transmit SQN's final report to the subject GL request. The referenced letter committed to provide the report for Unit 1 by June 30, 1995, and Unit 2 by November 1, 1995. However, the attached report is for both units; therefore, it completes both commitments.
It should be noted that the report indicates that TVA is presently modifying the residual heat removal system heat exchanger support legs on both units. This modification was a result of the IPEEE review and the physical work is now complete on both units. In addition, during the final review.of the IPEEE walkdowns, it was determined that an additional modification was required. It was discovered that the clearance between a reactor coolant pump seal return valve and the crane wall was not sufficient to prevent contact after system heatup. Since the results of the report had been finalized at the time of the discovery, this modification requirement is not contained in the subject report.
9507060191 950629 PDR ADOCK 05000327 P
U.S. Nuclear Regulatory Commission Page 2 June 29, 1995 This deficiency is documented in Problem Evaluation Report (PER)
SQ950462PER, R1. The operability of the system was not impaired and any corrective actions will be tracked and documented in the PER.
There are no commitments contained in this submittal. Please direct questions concerning this issue to W. C. Ludwig at (615) 843-7460.
Sincerely, R. H. Shell Manager SON Site Licensing Sworn to and subscir d before me NotalryV Public
- ,,/
My Commission Expiresz
.l Enclosure cc (Enclosure):
Mr. D. E. LaBarge, Project Manager Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-2739 NRC Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 Regional Administrator U.S. Nuclear Regulatory Commission Region I1 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323-2711
ENCLOSURE SEQUOYAH NUCLEAR PLANT (SQNP)
INDIVIDUAL PLANT EVALUATION OF EXTERNAL EVENTS (IPEEE)
JUNE 1995