ML20268C252
| ML20268C252 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 09/24/2020 |
| From: | NRC |
| To: | NRC/NRR/DNRL |
| References | |
| Download: ML20268C252 (7) | |
Text
From:
Schiller, Alina Sent:
Thursday, September 24, 2020 3:24 PM To:
Vogtle PEmails
Subject:
Discussion material for Oct 1, 2020 Vogtle Units 3 and 4 public meeting Attachments:
MOV Loss of Power public call Oct 1 2020.pdf Alina Schiller Project Manager Office of Nuclear Reactor Regulation Vogtle Project Office O-13 C10 301-415-8177
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Discussion material for Oct 1, 2020 Vogtle Units 3 and 4 public meeting Sent Date:
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VEGP 3&4
Motor Operated Valve
Loss of Motive Power Verification
September 24, 2020
MOV Loss of Power Verification There are 10 ITAAC that perform a Loss of Power Verification that include MOVs:
47 265 118 301 138 382 206 470 250 700
Example of Loss Power ITAAC ITAAC 118
Current MOV Test Verification
- MOVs are either positioned to the Open or Closed position depending on the valve being tested.
- Power supply to the MOV is opened
- MOV is verified to not change position
Proposed MOV Test Verification
- Setup work order verifies proper operation of the Open and Close contactors.
- Verification that the Open and Close contactors operate properly ensures that upon a loss of power to the MOV, that the MOV will fail As-Is. Power to operate the valve motor come through contacts from the Open and Close contactors.