ML11158A269: Difference between revisions
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By letter dated January 25, 2011 (Agencywide Documents Access and Management System Accession No. ML110250738), the U.S. Nuclear Regulatory Commission Region I Office requested assistance from the Office of Nuclear Reactor Regulation (NRR) in evaluating Peach Bottom Atomic Power Station (PBAPS) Operability Determination (OD) 10-007 (Reference 10). | By letter dated January 25, 2011 (Agencywide Documents Access and Management System Accession No. ML110250738), the U.S. Nuclear Regulatory Commission Region I Office requested assistance from the Office of Nuclear Reactor Regulation (NRR) in evaluating Peach Bottom Atomic Power Station (PBAPS) Operability Determination (OD) 10-007 (Reference 10). | ||
PBAPS performed OD 10-007 to address degradation of the spent fuel pool (SFP) neutron absorber Boraflex. Task Interface Agreement (TIA) 2011-004 specifically requested: | PBAPS performed OD 10-007 to address degradation of the spent fuel pool (SFP) neutron absorber Boraflex. Task Interface Agreement (TIA) 2011-004 specifically requested: | ||
: 1. NRR conduct a technical assessment of OD 10-007 that PBAPS is using to support operability of the SFPs through 2014. If NRR determines that OD 10-007 does not provide reasonable assurance of operability through 2014, the Region I Office requests that NRR provide an estimate of when SFP operability will be challenged, including technical bases for any earlier time limitations. | : 1. NRR conduct a technical assessment of OD 10-007 that PBAPS is using to support operability of the SFPs through 2014. If NRR determines that OD 10-007 does not provide reasonable assurance of operability through 2014, the Region I Office requests that NRR provide an estimate of when SFP operability will be challenged, including technical bases for any earlier time limitations. | ||
: 2. NRR review whether the licensee's analyses as documented in OD 10-007 employ appropriate assumptions and calculation methodologies to demonstrate with reasonable assurance that the subcritical margin limit for the SFP as specified by Technical Specification 4.3.1.1.b (K effective 0.95) will continue to be met. | : 2. NRR review whether the licensee's analyses as documented in OD 10-007 employ appropriate assumptions and calculation methodologies to demonstrate with reasonable assurance that the subcritical margin limit for the SFP as specified by Technical Specification 4.3.1.1.b (K effective 0.95) will continue to be met. | ||
The NRR staff's assessment is documented in the enclosed evaluation and is based on all available documents as of April 1, 2011. This date was chosen to allow the staff to review all licensee documents up to a reasonable point that supported the licensee's operability determination in an effective and timely manner. The NRR staff is aware that the licensee has prepared additional documentation that may, after a thorough review, alter the conclusions in this TIA response. In order to support the Region I Office's request for a timely review, the NRR staff chose not to delay issuance of this TIA response so that additional information could be reviewed. | The NRR staff's assessment is documented in the enclosed evaluation and is based on all available documents as of April 1, 2011. This date was chosen to allow the staff to review all licensee documents up to a reasonable point that supported the licensee's operability determination in an effective and timely manner. The NRR staff is aware that the licensee has prepared additional documentation that may, after a thorough review, alter the conclusions in this TIA response. In order to support the Region I Office's request for a timely review, the NRR staff chose not to delay issuance of this TIA response so that additional information could be reviewed. | ||
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By letter dated January 25, 2011 (Agencywide Documents Access and Management System Accession No. ML110250738), the U.S. Nuclear Regulatory Commission Region I Office requested assistance from the Office of Nuclear Reactor Regulation (NRR) in evaluating Peach Bottom Atomic Power Station (PBAPS) Operability Determination (OD) 10-007 (Reference 10). PBAPS performed OD 10-007 to address degradation of the spent fuel pool (SFP) neutron absorber Boraflex. Task Interface Agreement (TIA) 2011-004 specifically requested: | By letter dated January 25, 2011 (Agencywide Documents Access and Management System Accession No. ML110250738), the U.S. Nuclear Regulatory Commission Region I Office requested assistance from the Office of Nuclear Reactor Regulation (NRR) in evaluating Peach Bottom Atomic Power Station (PBAPS) Operability Determination (OD) 10-007 (Reference 10). PBAPS performed OD 10-007 to address degradation of the spent fuel pool (SFP) neutron absorber Boraflex. Task Interface Agreement (TIA) 2011-004 specifically requested: | ||
NRR conduct a technical assessment of OD 10-007 that PBAPS is using to support operability of the SFPs through 2014. If NRR determines that OD 10-007 does not provide reasonable assurance of operability through 2014, the Region I Office requests that NRR provide an estimate of when SFP operability will be challenged, including technical bases for any earlier time limitations. | NRR conduct a technical assessment of OD 10-007 that PBAPS is using to support operability of the SFPs through 2014. If NRR determines that OD 10-007 does not provide reasonable assurance of operability through 2014, the Region I Office requests that NRR provide an estimate of when SFP operability will be challenged, including technical bases for any earlier time limitations. | ||
: 1. NRR conduct a technical assessment of OD 10-007 that PBAPS is using to support operability of the SFPs through 2014. If NRR determines that OD 10-007 does not provide reasonable assurance of operability through 2014, the Region I Office requests that NRR provide an estimate of when SFP operability will be challenged, including technical bases for any earlier time limitations. | : 1. NRR conduct a technical assessment of OD 10-007 that PBAPS is using to support operability of the SFPs through 2014. If NRR determines that OD 10-007 does not provide reasonable assurance of operability through 2014, the Region I Office requests that NRR provide an estimate of when SFP operability will be challenged, including technical bases for any earlier time limitations. | ||
: 2. NRR review whether the licensee's analyses as documented in OD 10-007 employ appropriate assumptions and calculation methodologies to demonstrate with reasonable assurance that the subcritical margin limit for the SFP as specified by Technical Specification 4.3.1.1.b (K effective 0.95) will continue to be met. | : 2. NRR review whether the licensee's analyses as documented in OD 10-007 employ appropriate assumptions and calculation methodologies to demonstrate with reasonable assurance that the subcritical margin limit for the SFP as specified by Technical Specification 4.3.1.1.b (K effective 0.95) will continue to be met. | ||
The NRR staff's assessment is documented in the enclosed evaluation and is based on all available documents as of April 1, 2011. This date was chosen to allow the staff to review all licensee documents up to a reasonable point that supported the licensee's operability determination in an effective and timely manner. The NRR staff is aware that the licensee has prepared additional documentation that may, after a thorough review, alter the conclusions in this TIA response. In order to support the Region I Office's request for a timely review, the NRR staff chose not to delay issuance of this TIA response so that additional information could be reviewed. | The NRR staff's assessment is documented in the enclosed evaluation and is based on all available documents as of April 1, 2011. This date was chosen to allow the staff to review all licensee documents up to a reasonable point that supported the licensee's operability determination in an effective and timely manner. The NRR staff is aware that the licensee has prepared additional documentation that may, after a thorough review, alter the conclusions in this TIA response. In order to support the Region I Office's request for a timely review, the NRR staff chose not to delay issuance of this TIA response so that additional information could be reviewed. | ||
Revision as of 13:28, 30 April 2019
| ML11158A269 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 06/30/2011 |
| From: | Alexis Nelson Division of Policy and Rulemaking |
| To: | Clifford J W Division Reactor Projects I |
| Miller, B W, NRR/DPR, 415-4117 | |
| Shared Package | |
| ML11158A268 | List: |
| References | |
| TIA 11-004 | |
| Download: ML11158A269 (2) | |
Text
OFFICIAL USE ONLY
- PROPRIETARY INFORMATION OFFICIAL USE ONLY
- PROPRIETARY INFORMATION June 30, 2011 MEMORANDUM TO: James W. Clifford, Deputy Director Division of Reactor Projects Region I FROM: Robert A. Nelson, Deputy Director /RA/ by CRegan for Division of Policy and Rulemaking Office of Nuclear Reactor Regulation
SUBJECT:
FINAL RESPONSE TO TASK INTERFACE AGREEMENT 2011-004, PEACH BOTTOM ATOMIC POWER STATION UNITS 2 AND 3 SPENT FUEL POOL NEUTRON ABSORBER DEGRADATION
By letter dated January 25, 2011 (Agencywide Documents Access and Management System Accession No. ML110250738), the U.S. Nuclear Regulatory Commission Region I Office requested assistance from the Office of Nuclear Reactor Regulation (NRR) in evaluating Peach Bottom Atomic Power Station (PBAPS) Operability Determination (OD)10-007 (Reference 10).
PBAPS performed OD 10-007 to address degradation of the spent fuel pool (SFP) neutron absorber Boraflex. Task Interface Agreement (TIA) 2011-004 specifically requested:
- 1. NRR conduct a technical assessment of OD 10-007 that PBAPS is using to support operability of the SFPs through 2014. If NRR determines that OD 10-007 does not provide reasonable assurance of operability through 2014, the Region I Office requests that NRR provide an estimate of when SFP operability will be challenged, including technical bases for any earlier time limitations.
- 2. NRR review whether the licensee's analyses as documented in OD 10-007 employ appropriate assumptions and calculation methodologies to demonstrate with reasonable assurance that the subcritical margin limit for the SFP as specified by Technical Specification 4.3.1.1.b (K effective 0.95) will continue to be met.
The NRR staff's assessment is documented in the enclosed evaluation and is based on all available documents as of April 1, 2011. This date was chosen to allow the staff to review all licensee documents up to a reasonable point that supported the licensee's operability determination in an effective and timely manner. The NRR staff is aware that the licensee has prepared additional documentation that may, after a thorough review, alter the conclusions in this TIA response. In order to support the Region I Office's request for a timely review, the NRR staff chose not to delay issuance of this TIA response so that additional information could be reviewed.
Enclosures:
CONTACT: Barry W. Miller, NRR/DPR (301) 415-4117Notice: The document transmitted herewith contains proprietary information. When separated from the enclosure, this document is decontrolled.
OFFICIAL USE ONLY
- PROPRIETARY INFORMATION OFFICIAL USE ONLY
- PROPRIETARY INFORMATION June 30, 2011 MEMORANDUM TO: James W. Clifford, Deputy Director Division of Reactor Projects Region I
FROM: Robert A. Nelson, Deputy Director /RA/ by CRegan for Division of Policy and Rulemaking Office of Nuclear Reactor Regulation
SUBJECT:
FINAL RESPONSE TO TASK INTERFACE AGREEMENT 2011-004, PEACH BOTTOM ATOMIC POWER STATION UNITS 2 AND 3 SPENT FUEL POOL NEUTRON ABSORBER DEGRADATION
By letter dated January 25, 2011 (Agencywide Documents Access and Management System Accession No. ML110250738), the U.S. Nuclear Regulatory Commission Region I Office requested assistance from the Office of Nuclear Reactor Regulation (NRR) in evaluating Peach Bottom Atomic Power Station (PBAPS) Operability Determination (OD)10-007 (Reference 10). PBAPS performed OD 10-007 to address degradation of the spent fuel pool (SFP) neutron absorber Boraflex. Task Interface Agreement (TIA) 2011-004 specifically requested:
NRR conduct a technical assessment of OD 10-007 that PBAPS is using to support operability of the SFPs through 2014. If NRR determines that OD 10-007 does not provide reasonable assurance of operability through 2014, the Region I Office requests that NRR provide an estimate of when SFP operability will be challenged, including technical bases for any earlier time limitations.
- 1. NRR conduct a technical assessment of OD 10-007 that PBAPS is using to support operability of the SFPs through 2014. If NRR determines that OD 10-007 does not provide reasonable assurance of operability through 2014, the Region I Office requests that NRR provide an estimate of when SFP operability will be challenged, including technical bases for any earlier time limitations.
- 2. NRR review whether the licensee's analyses as documented in OD 10-007 employ appropriate assumptions and calculation methodologies to demonstrate with reasonable assurance that the subcritical margin limit for the SFP as specified by Technical Specification 4.3.1.1.b (K effective 0.95) will continue to be met.
The NRR staff's assessment is documented in the enclosed evaluation and is based on all available documents as of April 1, 2011. This date was chosen to allow the staff to review all licensee documents up to a reasonable point that supported the licensee's operability determination in an effective and timely manner. The NRR staff is aware that the licensee has prepared additional documentation that may, after a thorough review, alter the conclusions in this TIA response. In order to support the Region I Office's request for a timely review, the NRR staff chose not to delay issuance of this TIA response so that additional information could be reviewed.
Enclosures:
CONTACT: Barry W. Miller, NRR/DPR (301) 415-4117 DISTRIBUTION: PLPB Reading File RidsNrrDpr John Jolicoeur PUBLIC Fred Bower RidsRgn1MailCenter Paul Krohn RidsNrrLADBaxley RidsRgn2MailCenter RidsAcrsAcnwMailCtr Barry Miller RidsRgn3MailCenter RidsRgn4MailCenter RidsNrrDprPgcb RidsNrrPMPeachBottom RidsNrrDciCsgb RidsNrrDssSrxb ADAMS ACCESSION NO: ML11158A268 OFFICE NRR/DPR/PLPB NRR/DPR/PLPB NRR/DSS/SRXB NRR/DCI/CSGB NRR/DPR/PLPB NAME BMiller DBaxley AUlses RTaylor (EMurphy for) JJolicoeur DATE 06/15/11 6 /16 /11 06/24/11 06/25/11 06/29 /11 OFFICE NRR/DPR NAME RNelson (CRegan for)
DATE 06/ 30/11 OFFICIAL RECORD COPY Notice: The document transmitted herewith contains proprietary information. When separated from the enclosure, this document is decontrolled.