ML21083A285

Ultimate Heat Sink (UHS) - NRC Pre-submittal Meeting, March 30, 2021 (EPID L-2021-LRM-0036) (Slides)

ML21083A285
Person / Time
Site:	Hope Creek
Issue date:	03/24/2021
From:	Public Service Enterprise Group
To:	James Kim Plant Licensing Branch 1
Kim J
References
EPID L-2021-LRM-0036
Download: ML21083A285 (8)

Text

Hope Creek Ultimate Heat Sink (UHS)

NRC Pre-submittal Meeting March 30, 2021

Agenda

• Purpose of Meeting

• Background of UHS TS 3.7.1.3

• Proposed Scope of Changes to TS 3.7.1.3

• Technical Bases

• Schedule

• Questions 2

Purpose of Meeting

• Proposing changes to UHS TS 3.7.1.3 to avoid future NOED requests

• Current TS require unnecessary shutdown for single equipment failure scenarios that are currently analyzed

• Sufficient margins are present in existing calculations to raise limits 3

Background of TS 3.7.1.3

• TS 3.7.1.3 based on TS Amendments 106, 120 and 168

• Amendment 106

• LCO temperature of 85°F

• Added TS Action for Emergency Discharge Valves

• Added TS Action for all EDGs, SACS pumps and SSWS pumps to be operable above 85°F

• Maximum temperature limit of 87°F 4

Background of TS 3.7.1.3

• Amendment 120

• Increased TS action temperature of all EDGs, SACS pumps and SSWS pumps to be operable to 88°F

• Increased maximum temperature from 87°F to 89°F

• Amendment 168

• Incorporated TSTF-330 temperature average

• Average of 89°F with peak not to exceed 91.4°F 5

Proposed Scope of Changes to TS 3.7.1.3

• Revise the temperature in UHS LCO 3.7.1.3b and in TS Action for Emergency Discharge Valves from 85°F to 88°F

• Replace TS action to have all EDGs, SACS pumps and SSWS pumps operable above 88°F with new 72-hour AOT for one EDG, SACS pump or SSW pump inoperable

• Revise TS average temperature to 91°F with a peak of 93°F

• Revise Surveillance Requirement (SR) 4.7.1.3.b temperature from 82°F to 85°F for implementing increased monitoring frequency

• No changes are made to the EDG, SACS or SSWS TS 6

Technical Bases

• Increase in temperatures for LCO and Actions are supported by margin in the existing calculation

• Proposed average and peak UHS temperature are consistent with TSTF-330

• Allowance of 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> action for an EDG, SACS pump or SSWS pump is consistent with single failure assumption 7

Schedule

• Current target for submission is April 2021

• Requesting a normal review period Any Questions?

8