ML20248A620
| ML20248A620 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 08/03/1989 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20248A625 | List: |
| References | |
| NUDOCS 8908080350 | |
| Download: ML20248A620 (4) | |
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j Dmcn Powna GOMPANY P.O. nox 33180 l
CHARLOTTE, N.C. 28242 HAL II. TUGKER Teternown vroe remnane"T (7o4) 373-4531 poor man ruoniserreon 1
August 3, 1989 1
U. S. Nuclaar Regulatory Commission Washington, D. C.
20555 1
Attention: Document Control Desk l
Subject:
McGuire Nuclear Station i
Docket Nos. 50-369 and 50-370 I
Proposed Technical Specifications Changes Unit 1 Cycle 6 Moveable Incore Detector Thimble Reduction l
(T.S.'s 3/4.2.2, 3/4.2.3, 3/4.2.4, 3/4.3.1, and 3/4.3.3.2) i Gentlemen:
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l Attached (pursuant to 10CFR 50.4 and 50.90) are proposed license amendments to Appendix A, Technical Specifications, of Facility Operating Licenses NPF-9 and j
NPF-17 for McGuire Nuclear Station Units 1 and 2, respectively. The proposed-j amendments are a one-time only change for Unit 1 Cycle 6 to reduce from 75% to j
50% the number of available moveable incore detector thimbles required for the l
Moveable Incore Detection System to be operable. These changes would allow j
l continued operation of Unit 1 should a current problem with sticking detector thimbles become worse.
1 Note that contains the propoaed Technical Specifications Changes.
i although the changes apply only for Unit 1 and there are no technical changes to the Unit 2 specifications, the Unit 2 Technical Specifications are j
administratively affected since they are combined into one specifications i
applying to both McGuire Units 1 and 2. contains the justification i
I and safety analysis for the proposed changes.
Included in Attachment 2 is: A) A figure illustrating the location of recently accessible and inaccessible detector thimbics; and B) An evaluatien of thimble deletion on peaking factors for Unit 1 Cycle 6 performed by Westinghouse in support of the proposed changes. Pursuant l
to 10CFR 50.91, Attachment 3 provides the analysis performed in accordance with l
the standards contained in 10CFR 50.92 which concludes that the proposed i
I amendments do not involve a Significant Hazards Consideration, and Duke is forwarding a copy of this amendment request application and No Significant Hazards Consideration Analysis to the North Carolina Department of Human Resources. The proposed amendments have been reviewed and have been determined to have no adverse safety or environmental impact.
It is requested that review and approval of these proposed amendments be expedited in view of the recent history regarding availability of detector 90l l
8908080350 890803
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4 PDR ADOCK 05000369 8 i P
PDC I
Y Document Control Desk Page 2 August 3, 1989 thimbles during Unit 1 Cycle 6 (See Attachment 2) and the need for the use of the Moveable Incore Detection System for Technical Specification required monitoring / calibration functions in the near future. The inability to use this incore instrumentation system for these functions would result in a forced unit shutdown. The next Technical Specification required use of the' system must be performed by August 19, 1989. Duke Power Company will clean the detector.
thimbles at the next refueling outage, or at the next shutdown of sufficient duration should one occur before the refueling outage (none are currently _
i planned), and/o: take other corrective actions as necessary to relieve the sticking problems.
This matter has previously been discussed with the NRC Resident Inspector and Mr.
D. S. Hood of your staff, and additional information regarding the detector thimble sticking problem and Unit 1 Cycle 6 Core Performance telecopied to Mr.
Hood on July 18, 1989. Should there be any questions concerning these proposed amendments or if additional information is required, please advise.
Very truly yours, Hei S. m
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Hal B. Tucker
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PBN175/lcs Attac1cnents l
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i Document Control Desk j
Page 3 August 3, 1989 I
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(W/ Attachments)
Mr. S. D. Ebneter Regional Administrator i
.U. S. Nuclear Regulatory Commission Region II l
101 Marietta St., NW, Suite 2900 Atlanta, Georgia 30329 i
Mr. Dayr.e Brown, Chief Radiation Protection Branch Division of Facility Services Departtent of Iluman Services
'j 701 Barbour Drive i
Raleigh, N. C.
27603-2008 Mr. Darl S. Hood j
Office of Nuclear Reactor Regulation i
U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. P. K. VanDoorn NRC Resident Inspector McGuire Nuclear Station i
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.o Document Control Desk Page 5' August 3, 1989 Hal B. Tucker, being duly sworn, states that he is Vice President of Duke Power Company; that he is authorized on the part of said Company to sign and file with the Nuclear Regulatory Commission this revision to the McGuire Nuclear Station License Nos. NPF-9 and NPF-17 and that all statements and matters set forth therein are true and correct to the best of his knowledge.
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b-fk Hal B. Tucker, Vice President- /
Subscribed and sworn to before me this 3rd day of August, 1989.
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1A Not'ary Public
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My Commission Expires:
C b. u, h n / n 2 o / 9 6 c
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