ML19340A112
| ML19340A112 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/06/1977 |
| From: | Parker W DUKE POWER CO. |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19340A114 | List: |
| References | |
| NUDOCS 7911250038 | |
| Download: ML19340A112 (3) | |
Text
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DATE CF OCCUMENT Duke Power Company 5/6/77 CharlotP.e,-North Carolina care Receivgo
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William O. Parker,' Jr.
5/13/77
.ggma KNOTORIZE O PROP INPUT FORM NUMBER CF COPIES RECElVED e/
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A NcLAssiriEO b _ 5 l4 M~ L Oco*v DESCRIPTtON ENCLOSU RE I
l Amdt. to CL/ change to tec( specs...no'torized Ltr. trans the following:
5/6/77... consists of revij ian to permit tihe more conservative recalibiation of nuclear ins trume nta tio n....'.
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Oconee Nuclear Station Docket Nos. 50-269, -270, -287
Dear Sir:
The Oconee Nuclear Station Technical Specification 4.1 " Operational Safety Review" specifies the frequency and type of surveillance required for Reactor Protective System and Engineered Safety Features Protective Systems instrumentation.
Item 3 of Table.4.1-1 requires that the nuclear instrumentation pcVer range amplifier be checked daily against a plant heat balance.
Calibration is necessary whenever the neutron power and core thermal power differ by more than 2 percent.
.Recently, a review of nuclear instrumentation calibration procedures at Oconee revealed a situation in which the nuclear instrumentation was not conservatively calibrated (see Reportable Occurrence Report Ro-269/77-14).
In order to provide additional assurance that the power range = nuclear instrumentation channels do not widely move out of calibration, Duke Power Company proposes to increase the fre-quencycof the calibration checks from once per day to once per shif t.
In order to aid in the performance of this surveillance, it is also proposed that the require-
..ments for nuclear instrumentation recalibration be revised to require this only in the event that the calibration checks show steady-state hect balance power to be greater than nuclear instrumentation power by more than 2 percent.
It.is requested pursuant to 10CFR50, 50.90 that the Oconee Nuclear Station Technical Specifications be revised to permit the more. conservative recalibration of nuclear
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instrumentation. The desired changes are shown on the attached technical specifi-cetion replacement pages.-
Very ruly yours, h aN tb. ' cl Wm.
O.' Parker, Jr.
'40P/ rr Attachments 9 71.3 4 C 6 3 3
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- -- - May16~~1977 P:gs 2 WILLIAM O. PARKER, JR., b_eing 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 Facility Operating Licenses DPR-38, DPR-47, and DPR-55; and that all statements and matters set forth therein are-true and correct to the best of his knowledge.
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. William O. Parker, Jr. Gee President Subscribed and sworn to before me this 6th day of May, 1977.
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khd.J Notary.Public'.
My. Commission Expires:
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