ML23317A203
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| ML23317A203 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 12/13/2023 |
| From: | Thomas K Nebraska Public Power District (NPPD) |
| To: | Byrd T, Thomas Wengert NRC/NRR/DORL/LPL4 |
| Shared Package | |
| ML23317A200 | List: |
| References | |
| Download: ML23317A203 (1) | |
Text
Pre-Submittal Meeting: Tech Spec Amendment Request for HPCI Flow Switch Setpoint Change December 13, 2023
Agenda
- Introduction
- Description of Proposed Change
- Reason for Proposed Change
- System Description
- Technical Evaluation
- Schedule
- Closing Remarks
Introduction
- The purpose of this meeting is to discuss a proposed license amendment request for the Cooper Nuclear Station (CNS)
- The proposed license amendment would revise the CNS Technical Specifications 3.3.5.1, Emergency Core Cooling System Instrumentation, Table 3.3.5.1-1, Function 3.f, High Pressure Coolant Injection Pump Discharge Flow -
Low (Bypass)
Description of Proposed Change
- The proposed license amendment would revise the Table 3.3.5.1-1, Function 3.f, High Pressure Coolant Injection Pump Discharge Flow - Low (Bypass) allowable value from
> 490 gpm to > 523 gpm
Reason for Proposed Change
- Installed DPIS is a Barton model 289A
- Replacement DPIS is a Barton model 581A
- Installation of the new model causes a change in the allowable value.
=
System Description===
- The High Pressure Coolant Injection (HPCI) provides protection to the core for the case of a small break in the reactor coolant boundary
- The function of the HPCI minimum flow valve is to ensure sufficient water flow through the HPCI pump to prevent pump overheating
- The primary function of the HPCI pump differential pressure indicating switch (dpis) is to open the HPCI minimum flow bypass valve upon sensing low flow
- The dpis contains two contacts; one for the safety function of opening, the other for the non-safety function of closing
Technical Evaluation
- Replacement switch has lower repeatability accuracy impacting the calculations that determine the setpoint and allowable value
- Replacement switch is qualified to the Cameron (Barton) test reports needed to allow full qualification to 10 CFR 50.49
- CNS utilizes General Electric Instrument Setpoint Methodology
Schedule
- Submit to NRC January 2024
- Estimated 1-yr NRC review time
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