ML20082C317
| ML20082C317 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 04/03/1995 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20082C308 | List: |
| References | |
| NUDOCS 9504060289 | |
| Download: ML20082C317 (2) | |
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NUCLEAR REGULATORY COMMISSION i
j WASHINGTON, D.C. 2006H001
'\\ **...l SAFETY EVALUATION BY THE OFFICE RELATED TO AMENDMENT NO. 1u TO FACILITY OPERATING LICENSE NPF-9 AND AMENDMENT NO. in TO FACILITY OPERATING LICENSE NPF-17 DUKE POWER COMPANY MCGUIRE NUCLEAR STATION. UNITS 1'AND 2 4
DOCKET NOS. 50-369 AND 50-370 l.0. INTRODUCTION By letter dated January 18, 1995, Duke Power Company (the licensee), submitted a request for changes to the McGuire Nuclear Station, Units I and 2, Technical Specifications (TS). The requested changes would revise TS Table 4.3-3 to allow the analog channel operational test interval for radiation monitoring instrumentation to be increased from_ monthly to quarterly.
The amendments are-consistent with the guidance in Generic Letter 93-05, "Line-Item Technical-Specifications Improvements to Reduce Surveillance Requirements for Testing During Power Operation."
2 2.0 EVALUATION The licensee has proposed to change.the analog channel operational test interval for the radiation monitoring instrumentation in TS Table 4.3-3 from monthly (M) to quarterly (Q). The NRC staff evaluated this issue as discussed in Section 5.14 of NUREG-1366, " Improvements to Technical Specification Surveillance Requirements," dated December 1992. The following discussion is based on the NUREG report and on the Generic Letter 93-05 that identified i
potential changes that licensees could propose to facility TS.
As with other instrumentation, radiation monitors are required to undergo three types of surveillances: a channel check, a channel functional test, and a calibration.
In addition, a source check, which provides an integral verification of the response of the detector, is performed.
The NRC staff found that radiation monitor testing appears to require a large amount of j
resources and that most failures of radiation monitors can be found from channel checks, source checks, or alarms.
The channel functional tests do not involve the sensor (radiation monitor) itself. The revised testing frequency would decrease the licensee burden and increase the availability of the radiation monitoring systems. Accordingly, the staff concluded that the frequency of the channel functional test could be changed to quarterly, subject to licensee verification that the change would be compatible with plant operating experience.
The licensee has performed a review of a sample of completed analog channel operational test procedures for the radiation monitors listed in McGuire's TS.
Approximately 12 consecutive monthly tests were analyzed from several i
9504060289 950403 DR ADOCK 0500 9
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- completed procedures per channel. These procedures had been completed in calendar years 1993 and 1994.
This emphasized the most recent test history of the radiation monitors. The licensee stated no problems were found that would preclude lengthing the surveillance interval for Analog Channel Operational
. Tests from monthly to quarterly. The licensee also stated that the radiation monitor performance history as observed over the review period is typical of performance history over the plant life.
The NRC staff finds that the i
licensee has established that the proposed change is consistent with McGuire operating experiehce and is, therefore, acceptable.
3.0 STATE CONSULTATION
In accordance with the Comission's regulations, the North Carolina State i
official was notified of the proposed issuance of the amendments. The State official had no coments.
4.0 ENVIRONMENTAL CONSIDERATION
The amendments change requirements with respect to installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and change surveillance requirements. The NRC staff has determined that the amendments involve 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 Comission has previously issued a proposed finding that the amendments involve no significant hazards consideration, and there has been no public coment on such finding (64'FR 11132 dated March 1, 1995). Accordingly, the amendments meet the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR 51.22(b), no environmental impact statement or environmental assessment need be prepared in connection with the issuance of the amendments.
5.0 CONCLUSION
The Commission 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, (2) such activities will be conducted in compliance with the Comission's regulations, and (3) the issuance of the amendments will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor:
V. Nerses
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Date:
April 3, 1995
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