ML20077K364
| ML20077K364 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 12/29/1994 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20077K352 | List: |
| References | |
| NUDOCS 9501100305 | |
| Download: ML20077K364 (3) | |
Text
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'4 UNITED STATES g
g NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 2006th 0001 o
,,.....s SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO. 82 TO FACILITY OPERATING LICENSE NO. NPF-42 WOLF CREEK NUCLEAR OPERATING CORP 0PATION WOLF CREEK GENERATING STATION DOCKET NO. 50-482
1.0 INTRODUCTION
By application dated February 23, 1994, Wolf Creek Nuclear Operating Corporation (the licensee) requested changes to the Technical Specifications (Appendix A to facility Operating License No. NPF-42) for the Wolf Creek Generating Station (WCGS). The proposed changes would revise Technical Specifications (TS) 3.8.1.1, "AC Sources Operating," and 3.8.1.2, "AC Sources Shutdown," to increase the minimum required storage volume of the emergency fuel oil day tanks from 390 gallons to 510 gallons.
Amendment 61 to the WCGS TS deleted TS 3/4.1.1.2, " Shutdown Margin - Mode 5,"
and revised the value for shutdown margin from 1.0% ok/k to 1.3% Ak/k.
However, the change to the shutdown margin in TS 3.1.2.4 (page 3/41-10) and the deletion of the reference to TS 3.1.1.2 from Action 5.b, Table 3.3-1 (page 3/4 3-6), and Bases 3/4.1.1 (page B 3/4 1-1) were inadvertently omitted from the application.
Amendment I to the WCGS TS deleted a figure from Bases Section 3/4.2, but the index was not revised to reflect the change.
2.0 fB2GR0VND During the performance of a self-initiated electrical distribution system functional assessment by Union Electric for the Callaway Plant, inconsistencies were found in the calculations for the emergency fuel oil day tank capacity. The calculation was based on a specific gravity of 28 degrees American Petroleum Institute (API) that resulted in a required capacity of 390 gallons. The amount of fuel in the day tank is required to be sufficient to supply the diesel for one hour with the engine operating at its continuous rating plus 10 percent. However, the technical specifications allow the use o,f fuel with a specific gravity of between 27 degrees API and 39 degrees API.
If feel with a specific gravity of 39 degrees API (lighter weight fuel) is used, 510 gallons are required to operate the engine at the continuous rating plus 10 percent. Because Wolf Creek and Callaway are of the same standard design, it was determined thst the change to the day tank volume was applicable to Wolf Creek.
9501100305 941229 PDR ADOCK 050004B2 P
i I 3.0 EVALUATION The emergency fuel oil day tanks (day tanks) are the suction sources for the engine-driven fuel oil pumps on the emergency diesel generators (EDGs). The day tanks are sized to supply a minimum of I hour's worth of fuel for the EDGs running at their continuous rating, plus a 10 percent margin.
In calculating tLe amount of fuel oil required in the day tanks, a specific gravity of 28 degrees API was assumed. This resulted in a requirement to maintain 390 gallons in the day tanks. However, TS 4.8.1.1.2d.(1)(a) allows fuel oil with a specific gravity of greater than or equal to 27 degrees API but less than or equal to 39 degrees API to be used. With the less dense fuel (39 degrees API), 510 gallons of fuel are required in the day tanks to provide the one hour operation of the EDG at rated load, plus an additional 10 percent.
Therefore, the licensee has proposed to change TS 3.8.1.1, "AC Sources Operating," and TS 3.8.1.2, "AC Sources Shutdown," to increase the minimum amount of fuel oil in the day tanks from 390 gallons to 510 gallons.
This change does not involve any change in the equipment and does not affect the long-term operation of the EDGs. This change assures that sufficient fuel oil is in the day tanks to operate the EDGs for I hour plus 10 percent using the lowest density fuel, as allowed by the TS. The staff finds this change acceptable.
Amendment 61 to the WCGS TS deleted TS 3/4.1.1.2, " Shutdown Margin - Mode 5,"
and revised the value for shutdown margin from 1.0% Ak/k to 1.3% Ak/k.
However, the change to the shutdown margin in TS 3.1.2.4 (page 3/4 1-10) and the deletion of the reference to TS 3.1.1.2 from Action 5.b, Table 3.3-1 (page 3/4 3-6), and Bases 3/4.1.1 (page B 3/4 1-1) were inadvertently omitted from the application.
This change incorporates those revisions that were previously approved into the TS. The staff finds these changes acceptable.
Amendment I to the WCGS TS deleted a figure from Bases Section 3/4.2, but the index was not revised to reflect the change. This change revises the index to reflect a previously approved change. The staff finds this acceptable.
4.0 STATE CONSULTATION
In accordance with the Commission's regulations, the Kansas State Official was notified of the proposed issuance of the amendment. The State official had no comments.
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5.0 ENVIRONMENTAL CONSIDERATION
The amendment changes a requirement with respect to installation or use of a facility component located within the restricted area as defired 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 3
significant increase in individual or cumulative occupational radiation exposure.
The Commission has previously issued a proposed finding that the i
amendment involves no significant hazards consideration, and there has been no i
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f i public comment on such finding (59 FR 17609). 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 issuance of the amendment.
6.0 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 Commission's regulations, and (3) the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor:
J. Stone Date: December 29, 1994.
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