ML14310A344: Difference between revisions
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| number = ML14310A344 | | number = ML14310A344 | ||
| issue date = 11/06/2014 | | issue date = 11/06/2014 | ||
| title = Draft RAI from Srxb TSTF-547, Clarification of Rod Position Requirements | | title = Draft RAI from Srxb TSTF-547, Clarification of Rod Position Requirements | ||
| author name = | | author name = | ||
| author affiliation = NRC/NRR/DSS/SRXB | | author affiliation = NRC/NRR/DSS/SRXB | ||
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=Text= | =Text= | ||
{{#Wiki_filter:REQUEST FOR ADDITIONAL INFORMATION TRAVELER TSTF-547, REVISION 0, CLARIFICATION OF ROD POSITION REQUIREMENTS TAC NO. MF3570 By letter dated March 6, 2014, Technical Specification Task Force (TSTF), submitted Traveler, TSTF-547, Revision 0, Clarification of Rod Position Requirements, related to rod cluster control assemblies. | {{#Wiki_filter:REQUEST FOR ADDITIONAL INFORMATION TRAVELER TSTF-547, REVISION 0, CLARIFICATION OF ROD POSITION REQUIREMENTS TAC NO. MF3570 By {{letter dated|date=March 6, 2014|text=letter dated March 6, 2014}}, Technical Specification Task Force (TSTF), submitted Traveler, TSTF-547, Revision 0, Clarification of Rod Position Requirements, related to rod cluster control assemblies. | ||
The Reactor Systems Branch (SRXB) has determined that additional information is required. | The Reactor Systems Branch (SRXB) has determined that additional information is required. | ||
SRXB - RAI 1 In TSTF-547, Clarification of Rod Position Requirements, Revision 0, Technical Specifications (TS) 3.1.5, Shutdown Bank Insertion Limits, and 3.1.6, Control Bank Insertion Limits, amend the required actions and completion time for Condition A as follows: | SRXB - RAI 1 In TSTF-547, Clarification of Rod Position Requirements, Revision 0, Technical Specifications (TS) 3.1.5, Shutdown Bank Insertion Limits, and 3.1.6, Control Bank Insertion Limits, amend the required actions and completion time for Condition A as follows: | ||
Latest revision as of 16:16, 10 January 2025
| ML14310A344 | |
| Person / Time | |
|---|---|
| Site: | Technical Specifications Task Force |
| Issue date: | 11/06/2014 |
| From: | NRC/NRR/DSS/SRXB |
| To: | |
| honcharik, michelle 415-1774 | |
| References | |
| TAC MF3570, TSTF-547, Rev 0 | |
| Download: ML14310A344 (1) | |
Text
REQUEST FOR ADDITIONAL INFORMATION TRAVELER TSTF-547, REVISION 0, CLARIFICATION OF ROD POSITION REQUIREMENTS TAC NO. MF3570 By letter dated March 6, 2014, Technical Specification Task Force (TSTF), submitted Traveler, TSTF-547, Revision 0, Clarification of Rod Position Requirements, related to rod cluster control assemblies.
The Reactor Systems Branch (SRXB) has determined that additional information is required.
SRXB - RAI 1 In TSTF-547, Clarification of Rod Position Requirements, Revision 0, Technical Specifications (TS) 3.1.5, Shutdown Bank Insertion Limits, and 3.1.6, Control Bank Insertion Limits, amend the required actions and completion time for Condition A as follows:
3.1.5 A.3: Restore the shutdown bank to within the insertion limits specified in the COLR with a completion time of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 3.1.6 A.3: Restore the control bank to within the insertion, sequence, and limits specified in the COLR with a completion time of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
As stated in the traveler, individual licensees have requested license amendments to address some of the issues provided in TSTF-547 for Westinghouse Pressurized Water Reactor (PWRs) plants in respect to Westinghouse plant Standard Technical Specifications (STS). Looking at current TS for Westinghouse plants, North Anna Power Station Units 1 and 2 TS for 3.1.5, Shutdown Bank Insertion Limits, and 3.1.6, Control Bank Insertion Limits, contain the following actions and completion times for restoring the respective banks within insertion limits, 3.1.5 B.2 Restore the shutdown bank to within insertion limit with a completion time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
3.1.6 C.2 Restore the control bank to within insertion limit with a completion time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
Based on this precedent set by North Anna Power Station Units 1 and 2, please provide justification for the shorter completion time, 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> as opposed to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, for restoring shutdown or control banks within insertion limits.