ML20209B929
| ML20209B929 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 09/02/1986 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20209B907 | List: |
| References | |
| NUDOCS 8609080342 | |
| Download: ML20209B929 (2) | |
Text
/
UNITED STATES 8
NUCLEAR REGULATORY COMMISSION g
r, er WASHINGTON, D. C. 20555
%.....)
SAFETY F_ VALUATION RY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 89 TO FACILITY OPERATING LICENSE NO. DPR-25 COMMONWEALTH EDISON COMPANY DPESDEN NUCLEAR POWER STATION, UNIT NO. 3 DOCKET NO. 50-749
1.0 INTRODUCTION
Py a letter dated June 18, 1986, Comonwealth Edison Company (CECO) (the licensee) proposed to amend Appendix A of Facility Operating License No.
DPR-75. The letter provided information to support new surveillance requirements for a newly modified reactor scram system having improved reliability.
It also provided changes in the calibration and functional test frequencies for certain specific instruments that are being modified into analog trip systems.
2.0 EVAltfATION l
Certain equipment is being replaced to satisfy the requirement of 10 CFR 4
50.49 regarding environmental qualification of electrical equipment i
important to safety.
In association with these changes, several existino l
instruments will be converted to analog trip systems; these are:
1 i
Reactor low Water level Instrument, 3-263-57A and B and 3-263-58A and B Reactor Water High level Instrument, 3-263-73A and B HPCI High Steam Flow Instrument, 3-2352 and 3-2353 HPCI Steam Line Low Pressure Instrument, 3-2389A through D Each analog trip system consists of an analog sensor and transmitter and a trip unit arrangement which ultimately actuates a trip relay. The frequency of calibration and functional testing for instrument loops of the analog trip system has been established in General Electric (GE)
Topical Report, NED0-21617-A, " Analog Transmitter / Trip Unit Systems for Engineered Safeguard Sensor Trip Inputs," December, 1978. This is an NRC-approved reference document. With the currently installed one-out-of-two, taken twice, logic, NEDO-21617-A states that each trip unit be subject to a calibration / functional test each month (staggered one channel out of four every week) and that an adequate calibration /
surveillance test interval for the transmitter is once per operating cycle. The Technical Specifications proposed by the licensee would require the above calibrations and tests to conform to the NEDO-21617-A frequencies. The staff finds this acceptable.
8609090342 860902 PDR ADOCK 05000249 P
., i 3.0 ENVIR0!! MENTAL CONSIDERATION i
This amendment involves a change to a requirement with respect to the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and changes to the surveillance requirements. The staff has determined that the amendment involves no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite and that there is no significant increase in individual or cumulative occupational radiation exposure. The Commission has previously issued a proposed finding that this amendment involves no significant hazards consideration and there has been no public connent on such finding. Accordinaly, this amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(91 Pursuant to 10 CFR 51.22(b) no environmental impact statement or environmental assessment need be prepared in connection with 1
the issuance of this amendment.
4.0 CONCLtlSION 3
The staff has concluded, based on the considerations discussed above, that:
(1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (2) such activities will be conducted in compliance with the Commission's regulations and the issuance of this amendment will not be inimical to the common defense and security nor to the health and safety of the public.
Principal Contributor:
R. Gilbert Dated: September 2, 1986 l
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