ML21032A238: Difference between revisions
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{{#Wiki_filter:}} | {{#Wiki_filter:2/2017 | ||
* RFO | |||
* ISTC-3700 Test 7/2018 | |||
* 2012 OM Code adoption 2/2019 | |||
*RFO | |||
*ISTC-3700 Test (SPI required) 8/2019 | |||
*End of ISTC-3700 Grace per OMN-20 (if applicable) 2/2021 | |||
*RFO | |||
*ISTC-3700 Test (SPI required) 2 year window for ISTC-3700 Incorrect 2 year window Spring refueling outage (RFO), during which ISTC-3700 testing is performed (2/2017). | |||
IST Program updates to 2012 OM Code after this test (7/2018). | |||
Next ISTC-3700 test is due 2 years after last ISTC-3700 test (2/2019). | |||
10 CFR 50.55a(b)(3)(xi) conditions the existing requirements of ISTC-3700 (states when implementing paragraph ISTC-3700) so the supplemental verification occurs on the same schedule, but may be performed at a different time within the 2 year window for ISTC-3700 testing (i.e. need not be concurrent). | |||
This provides flexibility to conduct local observation and pressure/flow measurement for both the open and close directions. | |||
The wording for supplemental verification has been present as an ASME-recommended practice in the OM Code for years (as far back as OMa-1988). | |||
A plant could conduct supplemental verification earlier than IST Program 2012 update, or submit a proposed alternative if additional time is needed to safely perform supplemental verification.}} | |||
Latest revision as of 11:18, 29 November 2024
| ML21032A238 | |
| Person / Time | |
|---|---|
| Issue date: | 02/01/2021 |
| From: | Douglas Bollock NRC/NRR/DRO/IRIB |
| To: | |
| Douglas Bollock, NRR/DRO/IRIB, 415-6609 | |
| References | |
| Download: ML21032A238 (1) | |
Text
2/2017
- ISTC-3700 Test 7/2018
- 2012 OM Code adoption 2/2019
- RFO
- ISTC-3700 Test (SPI required) 8/2019
- End of ISTC-3700 Grace per OMN-20 (if applicable) 2/2021
- RFO
- ISTC-3700 Test (SPI required) 2 year window for ISTC-3700 Incorrect 2 year window Spring refueling outage (RFO), during which ISTC-3700 testing is performed (2/2017).
IST Program updates to 2012 OM Code after this test (7/2018).
Next ISTC-3700 test is due 2 years after last ISTC-3700 test (2/2019).
10 CFR 50.55a(b)(3)(xi) conditions the existing requirements of ISTC-3700 (states when implementing paragraph ISTC-3700) so the supplemental verification occurs on the same schedule, but may be performed at a different time within the 2 year window for ISTC-3700 testing (i.e. need not be concurrent).
This provides flexibility to conduct local observation and pressure/flow measurement for both the open and close directions.
The wording for supplemental verification has been present as an ASME-recommended practice in the OM Code for years (as far back as OMa-1988).
A plant could conduct supplemental verification earlier than IST Program 2012 update, or submit a proposed alternative if additional time is needed to safely perform supplemental verification.