ML23317A203

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Pre-Submittal Meeting: Tech Spec Amendment Request for HPCI Flow Switch Setpoint Change
ML23317A203
Person / Time
Site: Cooper Entergy icon.png
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)

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 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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