ML20204B596
| ML20204B596 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 03/17/1999 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20204B602 | List: |
| References | |
| NUDOCS 9903220178 | |
| Download: ML20204B596 (1) | |
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i At the shutdown Unit 2, SRW heat exchanger work is planned during periods of high decay l
heat and periods of reduced reactor coolant system inventory, which are potentially risk significant plant operational states. To address shutdown risk, the licensee performed a qualitative assessment of the plant operational states impacted by the work. At all times at i
least one of the Unit 2 EDGs will be operable, but with degraded reliability due to the attemate j
cooling configurations for these dieselsf During reduced inventory, both Unit 2 EDGs are i
planned to be available. In addition, the SBO EDG OC will be available, the reliability of which is not impacted by the planned Unit 2 work. Also, as discussed above offsite power will be protected. Furthermore, the licensee evaluates the outage schedule, and any subsequent l
changes, to ensure minimum essential equipment is available per procedure NO l 103, " Conduct of Lower Mode Operations." Thus, while performing this work, the staff notes l
that the licensee will take steps to keep reliable offsite and onsite power available and will l
continuously evaluate shut down risk and take necessary actions to minimize risk.
l The staff finds that the potential benefit of the new SRW heat exchangers, the PSA insights, the messures established to minimize risk, and the licensee's risk evaluation processes support the licensee's one-time TS amendment.
i Based on the above, the staff concludes that apnroval of the licensee's application for amendment, based on the potential benefit of the new SRW heat exchangers coupled with the licensee's risk evaluction and measures established to minimize risk and increase the availability of the EDGs during the replacement of the Unit 2 SRW heat exchanger replacement, is appropriate. Therefore, the licensee's request for a one-time TS change to the Unit 2 Bases for TS 3.3.2 is acceptable.
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3.0 STATE CONSULTATION
in accordance with the Commission's regulations, the Maryland State official was netified of the proposed issuance of the amendment. The State official had no comments.
4.0 ENVIRONMENTAL CONSIDERATION
j The amendment changes a requirement with respect to installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20. The NRC 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 the amendment involves no significant hazards consideration, and there has been no public comment on such finding (63 FR 45523). Accordingly, the amendment meets 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
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issuance of the amendment.
Corrected by letter dated ftrch 17,1999.
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