ML20057D217
| ML20057D217 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 09/27/1993 |
| From: | Fenech R TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20057D218 | List: |
| References | |
| NUDOCS 9310010276 | |
| Download: ML20057D217 (3) | |
Text
,..
1 i
l
~_
Terv.essee Valey Aatnw,. Post Of$ce Bc3 2 00 Soddy Dasy. Tennessee 373D 2000 1
i l
i Robert A. Fenech Vce Prescent Se@mpah fWear Rant September 27, 1993 i
i i
TVA-SQN-TS-93-13 10 CFR 50.90 l
l U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 l
Gentlemen:
In the Matter of
)
Docket Nos. 50-327 l
Tennessee Valley Authority
)
50-328 l
l SEQUOYAH NUCLEAR PLANT (SQN) - TECHNICAL SPECIFICATION (TS) CRANGE 93-13,
" REVISION OF DIESEL GENERATOR (D/G) LOADING REQUIREMENTS FOR LOAD-RUN AND l
24-HOUR ENDURANCE SURVEILLANCES" l
In accordance with 10 CFR 50.90, we are enclosing a requested amendment to Licenses DPR-77 and DPR-79 to change the TSs of SQN Units 1 and 2.
The proposed change implements new loading requirements for the D/G during the load-run and 24-hour endurance and margin surveillances found in TSs 4.8.1.1.2.a.5 and 4.8.1.1.2.d.7, respectively. The proposed values are based on the latest version of the standard TSs (NUREG 1431) and Revision 3 of. Regulatory Guide (RG) 1.9 that was issued in July 1993. A bases revision is included to document the application of RG 1.9 recommendations for these surveillances.
The proposed TS change is identified in Enclosure 1.
The justification for the proposed TS change is provided in Enclosure 2.
A proposed determination of no significant hazards consideration performed pursuant to 10 CFR 50.92 is provided in Enclosure 3.
The proposed change was initiated after the discovery that SQN D/Gs were being tested above the manufacturer's short-time load rating. The power levels recorded for past D/G testing to satisfy this surveillance were questioned by NRC's Operational Readiness Assessment Team during the August 1993 inspection. This concern led to the discovery that D/G testing had been performed at inappropriate loading levels. D/G testing i
1 010035 n
9310010276 930927 P
ADOCK OtK)DO327 fN!
PINT l
P pg g
i j
I U.S. Nuclear Regulatory Commission Page 2 I
September 27, 1993 is being performed at the new load levels proposed in this request to satisfy the 18-month TS Surveillance Requirement (SR) 4.8.1.1.2.d.7.
l Pending NRC's approval of the proposed TS change, TVA will use these tests to meet SR 4.8.1.1.2.d.7.
The current surveillance interval, including the TS 4.0.2 allowed extension, ends on January 30 and February 2, 1994, for the Unit 2 D/Gs.
Therefore, TVA requests NRC's approval of the proposed change by January 1994 to prevent a shutdown of
)
the SQN units as a result of exceeding the allowable surveillance interval for TS 4.8.1.1.2.d.7.
The present TS 4.8.1.1.2.a.5 load requirements will continue to be used until the approval of this request.
TVA requests a 30-day implementation period for this TS change following issuance.
Please direct questions concerning this issue to K. C. Weller at (615) 843-7527.
t l
Sincerely, Robert A. Fenech Sworn to and subsc ibed bef ore me this 17_.C4 day of.
1993 N
Notary Pub'lic My Commission Expires __ Q //77 Enclosures I
cc:
See page 3 i
I I
U.S. Nuclear Regulatory Commission Page 3 September 27, 1993 cc (Enclosures):
Mr. D. E. LaBarge, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-2739 Mr. Michael H. Mobley, Director (w/o Enclosures)
Division of Radiological Health 3rd Floor L & C Annex 401 Church Street Nashville, Tennessee 37243-1532 NRC Resident inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 Regional Administrater U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323-2711 l
I l
- - _ - _ - - _ _ _ _ - _ _ _ - _