ML19322B604
| ML19322B604 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 02/05/1976 |
| From: | Parker W DUKE POWER CO. |
| To: | Rusche B Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19322B605 | List: |
| References | |
| NUDOCS 7912040632 | |
| Download: ML19322B604 (3) | |
Text
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DifEE POWER COMPMY Powen Dunmswo 422 Sourn Cuuacu Srazzi, CHANWTTz, N. C. asa42 w s LLI And O. PAMPER,JR.
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Mr. Benard C. Rusche
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Director of Nuclear Reactor Rc atp@ l2197B P C 6
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$M Re: Oconee Nuclear Station
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Dear Mr. Rusche:
Pursuant to 10 CFR 50 5 50.90, changes to Sections 3.6 and 3.3 of the Oconee Nuclear Station Technical Specifications, Appendix A to Facility Operating Licenses DPR-38, -47 and -55 are requested.
The proposed changes are indicated on the attached Technical Specification replacement page. The justification for these changes are provided below:
The applicability and objective statements of Specification 3.6 have been revised such that this specification will apply in all modes of system operation, i.e., shutdown, startup and operation, except refueling shutdown. This will eliminate the present anbiguity which exists in determining the applicability of this specification.
Specifications 3.8.4 and 1.2.6 address the reactor conditions, in lieu of containment integrity conditions, which must be maintained during a refuelic.3 shutdown.
The current Specification 3.6.2, which requires containment integrity when the Reactor Coolant System is open to the containment atmosphere and the requirements for a refueling shutdown are not met, has been deleted.
Specification 3.8.4 requires that the conditions for a refueling shutdown be maintained during reactor vessel head removal.
Routine maintenance which requires opening of the Reactor Coolant System to the containment atmosphere, such as instrument replacements, reactor coolant pump maintenance, etc., do not involve the possibility of reactivity insertion accidents; therefore, containment integrity is not necessary at all times when the Reactor Coolant System is open.
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Mr. Benard C. Ruechs February 5, 1976 Page 2 A new Specification 3.6.2 is proposed which will require containment integrity when the reactor is suberitical by less than 1% Ak/k or when reactivity insertions are being made which would result in the reactor's being subcritical by less than 1% Ak/k.
The deletion of Technical Specification 3.3.7 eliminates the requirement to test redundcnt components prior to removal from service of one train of low pressure injection, high pressure injection, reactor building spray, low pressure service water, reactor building cooling, or penetration room ventilation. Periodic surveillance is conducted on these systems and the surveillance interval provides assurance of operability.
Testing of the redundant component of a system prior to initiating maintenance on a train can consume a considerable portion of the allowed maintenance period and in some cases could be deleterious to the system operability.
The allowed maintenance periods in conjunction with periodic surveillance provide an acceptably low probability of failure of the redundant component.
Ver truly yours, a o.
U. tu William O. Parker, Jr.
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Hr. Bensrd C. Rurche Februmry 5, 1976 Page 3 W. O. PARKER, JR., 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 request for amendment of the Oconee Nuclear Station Technical Specifications, Appendix A to Facility Operating Licenses DPR-38, DPR-47 and DPR-55; and that all state ts and matters set forth therein are true and correct to the best of a knowledge.
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W. O. Parker, Jr., Vice'Piesident ATTEST-6 y
John C. Goodman M r.
Assistant Secretary Subscribed and sworn to before me this 5th day of February 1976.
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