ML20236D215
| ML20236D215 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 10/13/1987 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20236D209 | List: |
| References | |
| NUDOCS 8710280073 | |
| Download: ML20236D215 (2) | |
Text
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UNITED ST ATEs v.
NUCLE AR REGULATORY COMMISSION
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i usm Ncio N. O. C, 20555 Q' h 0&f/l SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATI SUPPORTING AMEN 0 MENT NO.10 TO FACILITY OPERATING LICENSE N KANSAS GAS & ELECTRIC COMPANY KANSAS CITY POWER AND LIGHT COMPANY KANSAS ELECTRIC POWER COOPERATIVE, INC.
WOLF CREEK GENERATING STATION DOCKET NO. 50-482 IllTRODUCTION 19, 1987 the Wolf Creek Nuclear Operating Corporation By letter dated June Those changes would:
proposed changes to the Technical Specifications.
(1) reduce the number containment atmosphere gaseous radioactivity moni-tors required to be operable from two to one, and (2) increase from 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> the permitted period of inoperability for one channel of both the control room air intake monitors and the fuel handling building atmosphere monitors.
EVALUATION lhe two containment atmosphere gaseous radioactivity monitors serve two They isolate containment and the control room if i
principal purposes. radioactivity levels are too high and, at lower levels, they aid in the The Standard Technical Specifications detection of RCS leakage.
(NUREG-0452) requirement is that one of these monitors be operable or that the containment purge valves be closed.
One operable monitor is adequate The present requirement of because other instruments provide redundance.
the Wolf Creek Technical Specifications is that both channels be operable The staff concludes that other for the purga valves to remain open.
monitors provide the necessary redundancy at Wolf Creek and that safety It was requirements can be met by requiring a single channel be operable.
also noted that the present requirement (that the purge valves be closed unless bots. monitors are operable) has an adverse effect on radiation That is, during cold shutdown when work is being performed control.
inside containnant, closing the purge valves causes releases to be unmonitored and unfiltered and it causes occupational exposure to be Therefore the change in number of channels operable #;
increased.
acceptable.
The purpose of the control room air intake gaseous radioactivity monitors is to automatically place the control room ventilation system in the The Stan-emergency mode of operation if radiation levels are too high.dard 8710200073 871013 PDR ADOCK 05000482 PDR p
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. The Wolf Creek Technical Specifica-the normal mode with one perable monitor.
tions permit only cre hour of normal operation when only 1 monitor it operable.
o The staff finds that the monitors are redundant so a single monitor meets the Furthermore, the present requirement tends to cause safety requirements. excessive use of the emergency system and thereby to reduce th Therefore it is acceptable it serving its intended purpose in an emergency.
to change the time period for operatirg in the normal mode with one operable 1
monitor from I to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
The main purpose of the fuel handling building exhaust gaseous radioactiv-ity monitors is to initiate isolation of the fuel handling building and to initiate operation of the emergency exhaust system in the event of nandling accident.
the emergency exhaust system if fuel movement is to continue with the monitor The present Wolf Creek Technical Specifications require both monitors to be operable and provide only I hour in which to actuate the inoperable.
The staff emergency exhaust system if either monitor becomes inoperable.
finds that the safety requirements are met by a single operable monitor because during fuel movement the requisite redundancy is provided by portable Therefore it is acceptable to change the time period for instruments.
operating in the nonnal exhaust mode from one hour to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
ENVIRONMENTAL CONSIDERATION The amendment involves a change in the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and The staff has determined that the amendment in a surveillance requirement. involves no significant increase in the amounts, an the types, of any effluents that may be released offsite, and that there is no significant increase in individual or cumulative occupational r amendment involves no significant hazards consideration and there ha exposures.
public comment on such finding.
criteria for categorical exclusion set forth in 10 CFR Sect assessment need be prepared in connection with the issuance of the amendment.
CONCLUSION The staff has concluded, based on the considerations discussed above, that:
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.(1) there is reasonable assurance that the health and safety activities will be conducted in compliance with the Commission's regulations, and the issuance of the amendment will not be inimical to the common and security or to the health and safety of the public.
Date: October 13, 1987 Principal Contributors:
Charles Willis Paul O'Connor
,