ML20114A071
| ML20114A071 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 07/31/1992 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20114A070 | List: |
| References | |
| NUDOCS 9208100113 | |
| Download: ML20114A071 (3) | |
Text
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i UNITED STATES 3
i NUCLEAR REGULATORY COMMISSION
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WASHINoTON. D C 20666
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DOCKET NOS. 50-266 AND 50-301 1.0 JNT RODUCT ION Ey letter dated Parch
. 1991, the Wisconsin Electric Power Cocpany (the licensee) requested chbnges to Technical Specification (15) lb.4.8, Auxiliary I
Feedrater System, and associated Bases, for the Point Beach Nuclear Plant, Units } and 2.
The proposed thanges to sections 15.4.8.1.a and 15.4.8,1.b would reau1re each auxiliary feedwater ( AFW) purrp to be started quarterly instead of renthly.
The proposed change to the Bases establishes the quarterly start of each steam turbine-driven AfW pump as a fast start without prior warm-up.
By letter dated Dece-ber 6,1991, the licensee requested a change to TS 15.3.4, Stes and Power Con ersion System, to clarify section 15.3.4.c.2, l
AFW pu p out-of-ser,1ce limit ations.
l 2.0 EV AL V ATR) 15 15.4.S.I a now requires that each motor-driven AfW pump be started monthly.
The licensee has been perforH ng these monthly tests since the units began operation in 1970 and 1972 for Point Beach Units 1 and 2, respectively.
In all of these tests, as well as starts resulting from automatic system actuations, they have not experienced any failures of the pumps to start on dem nd, thus demonstrating a high degree of reliability.
TS 15.4.8.1.b now requires that each steam turbine-driven AfW pump be started ronthly, provided steam is available.
This monthly test is conducted by first blowing duwn the steam supply lines to remove accumulated water and then slowly bringing the pump to full speed over a 2-minute period.
While the test demonstrates that the purrp is operable, it does not test the pump under the conditions and configurations expected during an actual demand, i.e., it does not demonstrate cold, fast start capability.
The licensee has evaluated the issue of performing a cold, fast start of the turbine-driven AFW pump as part of its review of INPO Significant Operating Event Report (50ER) 86-01, " Reliability of Auxiliary feedwater Systems,"
Reco~rendation 3 of that 50ER suggests Terry turbine sy<tems, such as are installed in the steam turbine-driven AFW pump at Point Beach Nuclear Plant, be subjected to periodic cold, fast start tests.
Commencing in early 1990, the monthly test required by 15 15.4.8.1.b was conducted once each quarter as 9200100113 920731 PDR ADOCK 05000266 P
1 a fast start test without prior warm-up of the steam supply piping and the pump.
To date, four cold, fast starts on each of the steam turbine-driven AFW pumps for each unit have been conducted successfully.
Prior to 1990 and twice each quarter in 1990, normal monthly tests have been performed. Throughout all those tests, as well as automatic starts resulting from actual system demands, no failures of the pumps to start have been experienced.
This change modifies the frequency of required starting of the AfW pumps and, in the case of the steam turbine-driven pump, requires this start at conditions more representative of those expected during an actual demand to start.
Since only the testing frequency and conditions will be changed, there will be no physical change to the facility, its systems, or its operating procedures.
Based on pump testing history, the present monthly testing has never indicated a pump failure, and the pumps have never failed to start in response to an actual demand, indicating a high degree of reliability.
In addition, the quarterly interval is based on ASME Section XI requirements which provide adequate assurance of pump operability.
The staff has reviewed the proposed changes to TS IS.4.8.1.a and 15.4.8,1.b and Bases, and finds them to be acceptable.
The intent of TS 15.3.4.C.?, Single Unit Operation, is to permit, as discussed in TS 15.3.0, " General Considerations," a temporary relaxation of the single f ailure criteria, consistent with overall reliability considerations, to allow limited time periods durinc which corrective actions may be taken to restore the AFW pumps to full operability.
The scoposed amendment to 15.3.4.C.2 serves to clarify that only one of the t1ree operable AFW pumps associated with a single unit may be taken out of service at one time.
This is consistent with the Bases and with TS 15.3.4.C.1 for two-unit operation.
The proposed change requires no hardware or procedural change and can be characterized as administrative in nature.
The staff finds this change to TS 15.3.4.C.2 to be acceptable.
3.0 STATE CONSULTATION
In accordance with the Commission's regulations, the Wisconsin State official was notified of the proposed issuance of the amendment. The State official had no comments.
4.0 IELR_QNMENTAL CONSIDERATION This amendment involves a change to a requirement with respect to the instal-lation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 or a change to a surveillance requirement. Ihc staff has determined that the amendment involves no significant increase ir 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 Conunission has previously-issued a proposed finding that this amendment involves no significant hazards
e I, consideration and there has been no public coment on such finding (57 FR 30264). Accordingly, this amendment meets the eligibility criteria for categorical exclusion set fort's in 10 CFR 51.22(c)(9).
This arendmsnt also involves changes in recordkeeping. reporting or administrative procedures or requirements. Accordingly, with rer.pect to these items, the amendments meet the eligibility criteria for categorical evclusion set forth in 10 CFR 651.22(c)(10).
Pursuant to 10 CFR SI.22(b). no environmental impact statement or environmental assessment need be prepared in connection with the issuance of this amendment.
5.0 CONCLUSION
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 )roposed manner, (2) such activities will be conducted in compliance with tie Commission'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:
J. Lombardo Date:
July 31.1992
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