ML20140F007
| ML20140F007 | |
| Person / Time | |
|---|---|
| Site: | Mcguire, Catawba, McGuire  |
| Issue date: | 06/10/1997 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20140E977 | List: |
| References | |
| NUDOCS 9706120278 | |
| Download: ML20140F007 (2) | |
Text
-- - - - -.
. - -... - ~ - - -
p uoyg k
UNITED STATES y
l g
j NUCLEAR REGULATORY COMMISSION o
WASHINGTON, D.C. 3066HOO1 s,...../
\\
SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATI.QH EXEMPTION FROM UPDATED FINAL SAFETY ANALYSIS REPORT UPDATE'RE0VIREMENTS OF 10 CFR 50.71(e)(4) l j
DUKE POWER COMPANY l
l CATAWBA NUCLEAR STATION. UNITS 1 AND 2 DQME.T NOS 50-413 AND 50-414 MCGUIRE NUCLEAR STATION DOCKET NOS. 50-369 AND 50-370 l
l.0 INTRODUCTION i
By letter dated February 24, 1997, Duke Power Company (the licensee) submitted a request for an exemption from the requirements of 10 CFR 50.71(e)(4),
" Maintenance of records, making reports." Section 50.71(e)(4) requires, in part, that " Subsequent revisions [to the Updated Final Safety Analysis Report (UFSAR)] must be filed annually or 6 months after each refueling outage provided the interval between successiva updates to the FSAR does not exceed i
24 months." The two Catawba Nuclear Station (CNS) units and the two McGuire Nuclear Station (MNS) units share a common UFSAR; therefore, this rule requires, literally, the licensee to update the station's UFSAR within 6 months after a refueling outage for either unit.
2.0 EVALUATION
-Section 50.71(e)(4) ensures that all licensees update their UFSARs at least every refueling outage and no less frequently than every 2 years. When two units share a common FSAR, the rule has the effect of making the licensee update the FSAR roughly every 12 to 18 months. TI'.e current rule, as revised in August 31, 1992 (57 FR 39358), was intended to provide some reduction in regulatory burden by limiting the frequency of required updates. The burden reduction, however, can only be realized by single-unit facilities or multiple-unit facilities that maintain separate UFSARs for each unit. 'For multiple-unit facilities with a common DFSAR, the "each refueling outage" phrase increases rather than decreases the regulatory burden.
To address this t
concern for multi-unit plants, the authors of the revised rule stated, in response to a comment on the draft revision, that "[w]ith respect to [the]
concern about multiple facilities sharing a common [U]FSAR, licensees will t
(~
have maximum flexibility for scheduling updates on a case-by-case' basis."
i I
l W
[
pD ADO l
P
('
4
) '
The licensee's requested exemption would permit periodic UFSAR updates within 6 months of each station's Unit 2 refueling outage, but not to exceed 24 months from the last revision. Thus the requirement that an update be submitted within 6 months of an outage of each unit is no longer retained.
With the exemption, the CNS and MNS UFSAR will be updated and maintained current within 24 months of the last revision.
3.0 CONCLUSION
The staff finds that the proposed alternative meets the intent of the existing regulations, requiring the UFSAR of each station be revised at least once per 24 months; therefore, the proposed exemption from 10 CFR 50.71(e)(4) for CNS Units 1 and 2, and MNS, Units 1 and 2, is acceptable.
Principal Contributor:
Peter S. Tam Date:
June 10, 1997 4
h