ML20117M116
| ML20117M116 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 09/10/1996 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20117M112 | List: |
| References | |
| NUDOCS 9609170304 | |
| Download: ML20117M116 (4) | |
Text
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y UNITED STATES 3
NUCLEAR REGULATORY COMMISSION f
WASHINGTON, D.C. 20666 0001
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT N0.96 TO FACILITY OPERATING LICENSE NO. NPF-57 PUBLIC SERVICE ELECTRIC & GAS COMPANY ATLANTIC CITY ELECTRIC COMPANY HOPE CREEK GENERATING STATION DOCKET N0. 50-354
1.0 INTRODUCTION
i By [[letter::05000354/LER-1995-016, :on 950708-09,SDC Bypass Event Occurred, Rendering SDC Mode of RHR Sys Inoperable Due to Procedural non-compliance & Inadequate Operator Knowledge,Skills & Training.Special Training on Event Conducted|letter dated March 6, 1996]], as supplemented by letter dated May 30, 1996, the Public Service Electric & Gas Company (PSE&G or the licensee) submitted a request for changes to the Hope Creek Generating Station (HCGS), Technical Specification (TSs). This amendment would change TS 3.8.1, "A.C. Sources -
Operating," to decrease the minimum fuel oil storage capacity of the Emergency Diesel Generator Fuel Oil Storage Tanks, from 48,800 to 44,800 gallons.
In addition, footnote ** would be deleted in TS 3.8.1.1.b.2.
The TS change would also add an Action Statement to address remedial action when a fuel oil transfer pump becomes inoperable.
2.0 DISCUSSION The onsite, Class 1E AC power system, is described in Section 8.3.1.1.2 of the HCGS Updated Final Safety Analysis Report.
The Hope Creek on-site, Class 1E AC power system incorporates four emergency diesel generators (EDGs) capable of providing electrical power to safety-related systems upon loss of off-site power.
Each EDG is supplied with diesel fuel oil from two 26,500-gallon capacity storage tanks.
Each of the two storage tanks has a dedicated fuel oil transfer pump for transferring fuel to the Day Tank of each EDG.
Diesel fuel oil from the Day Tank is supplied directly to the EDG. Diesel fuel oil in the storage tanks is sufficient to support the EDGs, for at least 7 days (prior to off-site resupply), while supplying AC power to safety-related loads under loss-of-offsite power conditions. The 7-day fuel oil supply assumes that diesel fuel oil from an inoperable EDG will be transferred to the operating EDGs (see License Amendment No. 59 dated November 22, 1993).
Requirements associated with the minimum diesel fuel oil inventory, and EDG equipment operability is contained in TS 3.8.1, "A.C. Sources - Operating."
The licensee has proposed three changes to TS 3.8.1.
The first change would decrease the minimum required diesel fuel oil storage volume for each EDG from 48,800 to 44,800 gallons in TS 3.8.1.1, "A.C. Sources - Operating," and TS 3.8.1.2, "A.C. Sources - Shutdown." The licensee stated, in the March 6, 1996, application, that "...the small volume available between the high and low [ storage tank) alarms, considering all instrument uncertainties, 9609170304 960910 PDR ADOCK 05000354 p
n L_ requires frequent refilling of the storage tanks.
The need to ensure complete
[ diesel fuel 011] sampling results are obtained before refilling a storage tank in conjunction with the frequent refillings places a burden on plant personnel and unnecessarily diverts, resources."
With regard to the second proposed change, the licensee has proposed deletion of foctnote ** of TS 3.8.1.1.b.2, which requires diesel fuel oil resupply within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> when the stored volume is between 48,800 and 44,709 gallons.
In their March 6,1996, application, the licensee indicated that compliance with the 48-hour resupply TS requires that "...a fuel oil tanker truck is maintained on site at all times. This incurs a significant monthly charge for the tanker as well as requiring the use of several Operations personnel to manually transfer fuel from the tanker to the affected storage tank (s)."
i The third proposed change to the TSs would add an Action Statement to TSs 3.8.1.1 and 3.8.1.2 to specify the remedial action to be taken when a diesel fuel oil transfer pump becomes inoperable.
The proposed Action Statement is as follows:
With one fuel oil transfer pump inoperable, realign the flowpath of the affected tank to the tank with the remaining operable fuel oil transfer pump within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> and restore the inoperable transfer pump to OPERABLE status within 14 days, otherwise declare the affected emergency diesel generator (EDG) inoperable. This variance may be applied to only one EDG at a time.
The current TSs do not address the inoperability of the diesel fuel oil transfer pumps.
3.0 EVALUATION In reviewing thi. proposed decrease in the minimum required diesel fuel oil i
storage volume (the primary diesel fuel oil source) for each EDG from 48,800 to 44,800 gallons, the NRC staff requested the licensee to identify, and describe the use, of secondary and tertiary, on-site, diesel fuel oil sources.
The licensee's May 30, 1996, supplement responded to the NRC staff's request for additional information. The licensee's response indicated that the secondary diesel fuel oil supply, obtained by transfer from the fuel oil storage tanks of another EDG, would be undertaken via a "hard pipe" cross-connect or by existing, prestaged equipment in a designated locker. The prestaged equipment is routinely inspected to assure its continued availability.
In the safety evaluation supporting License Amendment No. 59, l
dated November 22, 1993, the NRC staff addressed the practice of transferring fuel oil, among the EDG fuel oil storage tanks. The NRC staff concluded that fuel oil transfer was acceptable to achieve at least 7 days of continuous EDG operation following a loss-of-coolant accident (LOCA).
The licensee's submittal also identified the following tertiary diesel fuel oil sources:
(1) Approximately 400,000 gallons of #2 fuel oil that is qualified as ASTM 20 diesel fuel is located in an 800,000-gallon tank i
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near the Salem facility.
Transfer of this fuel oil could be accomplished via an on-site tank truck.
This tank truck is owned by the licensee and is distinct from the one that is subject to the significant charges noted above.
(2) A volume of 250,000 to 1,000,000 gallons of #2 fuel oil is maintained in a 1,000,000-gallon tank adjacent to Hope Creek. A recent sample of this fuel oil confirmed that key parameters are within the bounds of ASTM 2D fuel oil.
This supply could be transferred by installing fittings and using available hoses.
In addition to the above sources, due to Hope Creek's location near refineries and storage facilities, resupply of diesel fuel oil to Hope Creek can be easily undertaken.by truck or barge.
Based upon the information provided by the licensee, the NRC staff concludes that, the proposed fuel oil levels in the fuel oil storage tanks provide greater than a seven-day supply for continuous EDG operation following a LOCA when crediting fuel oil transfer among the fuel oil storage tanks per License Amendment No. 59. Moreover, the large quantities of additional fuel oil located on the Salem / Hope Creek site, allow for convenient replenishment of the fuel oil storage tanks if needed. Accordingly, the licensee's proposed decrease in the minimum required diesel fuel oil storage volume for each EDG from 48,800 to 44,800 gallons in TS 3.8.1.1 (A.C. Sources - Operating) and TS 3.8.1.2 (A.C. Sources - Shutdown) is acceptable.
In addition, footnote ** of TF 3.8.1.1.b.2, which requires diesel fuel oil resupply (within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />) when the stored volume is between 48,800 and 44,709 gallons, is unnecessary and can be deleted.
Finally, with regard to proposed Action Statement for the diesel fuel oil transfer pumps, the NRC staff notes that the diesel fuel oil storage and transfer system offers substantial redundancy in that each EDG is supplied by two storage tanks, each with its own transfer pump. The proposed Action Statement would allow the licensee 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> to realign the diesel. fuel oil flowpath to compensate for an inoperable transfer pump.
During the subject period, the EDG would still be operable in that diesel fuel oil could still be transferred to the day tank via the remaining, operable transfer pump. The NRC staff concludes that the proposed Action Statement is commensurate with the importance of the fuel oil transfer pumps, recognizes the degree of redundancy that is provided, and is acceptable.
4.0 STATE CONSULTATION
By letter dated July 19, 1996, the State of New Jersey, Department of Environmental Protection, provided comments concerning the March 6, 1996, application for license amendment. The comments state that the licensee has proposed remedial action, in TS 3.8.1.1 and 3.8.1.2, that would require realignment of the EDG fuel oil source, within 7 days, upon determination that an EDG fuel oil transfer pump is inoperable.
Further, since successful valve operation is required for the realignment, there should be assurance that such valve operation can be successfully accomplished (e.g., periodic " cycling" of the subject valves).
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i In response to the comments from the State of New Jersey, the NRC staff notes that the proposed TS changes further require that, should th realignment of the EDG fuel oil source be unsuccessful (e.g., a critical valve will not open or close), within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, the proposed TS requires that the associated EDG be declared inoperable. The NRC staff concludes that the proposed TS implicitly considers the operability of the valves that must be successfully operated to realign the EDG fuel oil sources. Accordingly, no changes in the proposed TS are needed.
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 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 (61 FR 34897).
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:
D. H. Jaffe Date:
September 10, 1996
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