ML20136F623
| ML20136F623 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 08/24/1995 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML20136C539 | List:
|
| References | |
| FOIA-96-485 NUDOCS 9703170015 | |
| Download: ML20136F623 (3) | |
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4 NUCLEAR REGULATORY COMMISSION 3
j W ASHINGTON. D.C. 20006 4 001
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l ATTACit4ENT 1 i
s SAFETY EVALUATION B" THE OFFICE OF NUCLEAR REACTOR REGULATION l
RELATING "O RENDVING THE IC HMGH PRESSURE SAFETY INJECTION PLMP OPTION FOR ST. LUCIE NUCLEAR STATION UNIT NO. 1 DOCKET ND 50-335
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1.0 INTRODUCTION
l By letter dated Hay 23, 1994, Florida Power and Light Company (FPL), the licensee for St. Lucie Unit 1, proposed to change their Technical Specifications (TS). Specifically, the changes are proposed for TS 3.5.2,
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" Emergency Core Cooling Systems (ECCS)", to remove the option that allows High Pressure Safety Injection (HPSI) Pump IC to be used as an alternative to the preferred HPSI pump for subsystem operability.
2.0 EVALUATION The St. Lucie ECCS, is capable of mitigating the consequences of a loss of coolant accident (LOCA) as set forth by the criteria in 10 CFR 50.46. The licensee indicated that the minimum requirement to meet the criteria is one high pressure and one low pressure safety injection pump along with its associated piping and valves.
Currently, the St. Lucie ECCS consists of two independent and redundant trains
- A-train which includes HPSI pump A powered by 4160V emergency bus IA3, B-train which includes HPSI pump B powered by 4160V emergency bus 183. The third pump, HPSI pump IC, is an installed spare and is capable of being aligned to the B HPSI header.
The licensee indicated that the Unit I safety analyses do not take credit for HPSI pump IC.
It is only required to be operable as a spare for B-train pump.
The HPSI pump IC is energized via the IA8 swing-bus, only when it is powered by Emergency Bus 183. This configuration is necessary to maintain t'he redundant but independent requirement of 10 CFR 50.46.
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9703170015 970301 PDR FOIA BINDER 96-485 PDR
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The licensee is proposing to remove the requirement to maintain HPSI pump 10 as an installed spare, based on the ECCS requirements being fulfilled by the A and 8 trains. The licensee indicated in a teleconference on August 23, 1995, that they have no intention of returning the HPSI pump IC to service. The l
pump had been valved-off from the ECCS and the motor has been disconnected.
3.0 CONCLUSIflN i
i The staff has reviewed the licensee's proposal to remove the option to use the IC HPSI in lieu of 18 HPSI. -Based on the licensee's submittal the requirements of 10 CFR 50.46 are met by the two ECCS trains A and B, and the
-HPSI pumps IA and 18 are 100 % capacity pumps. The licensee has also assured the staff that the NPSI pump IC will not be returned to service. Therefore, l
the staff finds the licensee's proposal to delete the pump delineation from TS I
' 5.2.a, acceptable.
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l ATTACMENT 2 SYSTEMATIC ASSESSMENT OF LICENSEE PERFORMANCE FACILITY NAME St. Lucie Nuclear Station, Unit 1
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i SUMARY OF REVIEW By letter dated May 23, 1994, Florida Power and Light Company (FPL), the
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licensee for St. Lucie Unit 1, proposed to change their Technical l
Specifications (TS). Specifically, the changes are proposed for TS 3.5.2, f
" Emergency Core Cooling Systems (ECCS)", to remove the option that allows High Pressure Safety Injection (NPSI) Pump IC to be used as an alternative to the preferred HPSI pump for subsystem operability.
NARRATIVE DISCUSSION OF LICENSEE PERFORMANCE - SAFETY ASSESSMENT /00ALITY VERIFICATION The licensee's submittal was concise and complete. A teleconference was made l
to clarify the licensee's future intent for the HPSI pump IC. The licensee was able to respond immediately. No further follow-up was required.
AUTHOR:
- 3. Brewer j
DATE:
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