ML18043A531

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Forwards Request for Change to Tech Specs to Allow Use of New in-core Detector Sys.Requests Issuance of Change Before 790501.W/check for Class II Change Fee
ML18043A531
Person / Time
Site: Palisades Entergy icon.png
Issue date: 03/06/1979
From: Hoffman D
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To: Ziemann D
Office of Nuclear Reactor Regulation
References
NUDOCS 7903090279
Download: ML18043A531 (3)


Text

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consumers P.ower company General Offices: Z12 West Michigan Avenue, Jackson, Michigan 49201

  • Area Code 517 788-0550 March 6, 1979
  • Director, Nuclear Reactor Regulation Att Mr Dennis 1 Ziemann_, Chief Operating Reactors Branch No 2 US Nuclear Regulatory Commission Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLANT - PROPOSED TECHNICAL SPECIFICATIONS CHANGE REQUEST -

IN-CORE DETECTORS Attached are three (3) original and thirty-seven (37) conformed copies of a request for a change to the Palisades Technical Specifications.

This change is necessary to allow the use of a new in-core detector system.

It is requested that this change be issued prior to May 1, 1979.

A check in the amount of $1,200 is attached pursuant to 10 CFR 170.22, Class II change.

David P Hoffman Assistant Nuclear Licensing Administrator cc JGKeppler, USHRC

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CONSUMERS POWER COMPANY Docket 50-255 Request for Change to the Technical Specifications License DPR-20 For the reasons hereinafter set forth, it is requested that the Technical Specifications contained in Provisional Operating License DPR-20, Docket 50-255, issued to Consumers Power Company on October 16, 1972 for the Palisades Plant be changed as described in Section I below:

I. Change A. Delete the word "four" from the last sentence in Technical Specification 3.11.a.

II. Discussion This change is necessary to allow the use of a new in-core detector system which has five axial levels vice four. This new system will provide a better measurement of core power distribution.

III. Conclusion Based on the foregoing, both the Palisades Plant Review Committee and the Safety*and Audit Review Board have reviewed these changes and find them acceptable.

CONSUMERS POWER COMPANY By C R Bilby, Production & Transmission Sworn and subscribed to before me this 6th day of March 1979.

Thayer, Notary Jackson County, Mich gan My commission expires July 9, 1979.

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3.ll IN-CORE INSTRUMENTATION Applicability Applies to the operability of the in-core instrumentation system.

Objective To specify the functional and operability requirements of the in-core instrumentation system.

Specification

a. Sufficient in-core instrumentation shall be operable whenever the reactor is operating at or above 50% rated power (65% of rated power if no dropped or misaligned rods ;3-re present)** in order to:

(1) Assist in. the calibration of the out-of-core detectors, and (2) Check gross core power distribution. As a minimum, 50% of the in-core detectors and not less than 10 individual detectors per quadrant, which shall include two detectors at each of the axial levels, shall be operable.

b. For power operation above 85% of rated power, in-core detector alarms generated by the data logger shall be set, based on the latest power distribution obtained, such that the peak linear power does not exceed the limit specified in Section 3.10.3.a. If four or more coincident alarms are received, the validity of the alarms shall be immediately determined and, if valid, power shall. be immediately decreased below alarm set point and a power distribution map obtained. If a power distribution is not obtained within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the alarm conditions, power shall be reduced to 85% of rated power. -
c. The in-core detector alarm set points shall be established, based on t!1e latest power distribution maps, normalized to the kW/ft limit defined in Section 3.10~3.a.
d. Power distributions shall be evaluated every week or more often as required by plant operations.
e. The data logger can be inoperable for two hours. If at the end of two hours it is not available, the power level shall not exceed 85% of rated power.
f. If the data logger for the in-cores is not in operation for more than two hours and reactor power is at or above 50% of rated power (65% of rated power if no dropped or misaligned rods are present), readings shall be taken and logged on a minimum of 10 individual detectors per quadrant (to include at least 50% of the total number of detectors in.

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