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| {{#Wiki_filter:TSTF-505TSTF-505Norbert Carte (NRC/NRR)August42015 August 4, 2015 ConcernsConcerns*MethodologytodeterminewhenalossoffunctionMethodology to determine when a loss of function has occurred is not described. | | {{#Wiki_filter:TSTF-505 TSTF-505 Norbert Carte (NRC/NRR)August42015 August 4 , 2015 Concerns Concerns*MethodologytodeterminewhenalossoffunctionMethodology to determine when a loss of function has occurred is not described. |
| *OperatorswillneedtomakethisdeterminationOperators will need to make this determination within one hour after the components are declared inoperable. | | *OperatorswillneedtomakethisdeterminationOperators will need to make this determination within one hour after the components are declared inoperable. |
| *Some regulatory requirements may not be explicitly modeled or addressed in the PRA. | | *Some regulatory requirements may not be explicitly modeled or addressed in the PRA. |
| *Reductions in redundancy and/or coincidence may introduce new events to be protected against. | | *Reductions in redundancy and/or coincidence may introduce new events to be protected against. |
| 2 When can a RICT be used? | | 2 When can a RICT be used? |
| *NEI 06-09 does not allow a RICT for a total loss of function, but does not have detailed guidance on what constitutes a total loss of gfunction*TSTF-505 allows two or more channels to be inoperable | | *NEI 06-09 does not allow a RICT for a total loss of function, but does not have detailed guidance on what constitutes a total loss of g function*TSTF-505 allows two or more channels to be inoperable |
| *When Components are shared between protection and control systems, how many need to be PRA Functional or Operable in order fortherenottobeatotallossoffunction?for there not to be a total loss of function? | | *When Components are shared between protection and control systems, how many need to be PRA Functional or Operable in order fortherenottobeatotallossoffunction?for there not to be a total loss of function?*Two Types of FunctionsIdentifiedinTSTablesforRTS&ESFAS |
| *Two Types of FunctionsIdentifiedinTSTablesforRTS&ESFAS | |
| -Identified in TS Tables for RTS & ESFAS-Specific functions identified in regulatory requirements | | -Identified in TS Tables for RTS & ESFAS-Specific functions identified in regulatory requirements |
| *IEEE 279-1971 3 | | *IEEE 279-1971 3 |
| Functional Requirements (StifPttidCtl)(Separation of Protection and Control)*GDCs 21 & 24 | | Functional Requirements (StifPttidCtl)(Separa tion o f P ro t ec tion an d C on t ro l)*GDCs 21 & 24 |
| *Effectively increases redundancy requirementsIEEE2791971*IEEE 279-1971-Explicit Requirement to protect against | | *Effectively increases redundancy requirementsIEEE279 1971*IEEE 279-1971-Explicit Requirement to protect against |
| *Single Failures of shared equipment (extra redundancy) | | *Single Failures of shared equipment (extra redundancy) |
| *Events (alternate channels) -Not discussed below | | *Events (alternate channels) -Not discussed below |
| *IEEE 603-1991SiiltIEEE279 1971-Similar to IEEE 279-19714 GDC21-Protectionsystemreliability | | *IEEE 603-1991SiiltIEEE279 1971-Si m il ar t o IEEE 279-1971 4 GDC 21-Protectionsystemreliability |
| -GDC 21Protection system reliability | | -GDC 21Protection system reliability |
| -"The protection system shall be designed for high functionalreliabilityRedundancyandindependence functional reliability | | -"The protection system shall be designed for high functionalreliabilityRedundancyandindependence functional reliability |
| -Redundancy and independencedesigned into the protection system shall be sufficient to assure that (1) no single failure results in loss of the ()gprotection function -"Typical Configurations: | | -Redundancy and independencedesigned into the protection system shall be sufficient to assure that (1) no sin gle failure results in loss of the ()gprotection function -"Typical Configurations: |
| *1 out of 2 | | *1 out of 2 |
| *2 out of 3 | | *2 out of 3 |
| *2 out of 4 | | *2 out of 4 |
| *1 out of 2 taken twice 5 | | *1 out of 2 taken twice 5 |
| GDC 24 -Se paration of protection and control pp"The protection system shall be separated from control systemstotheextentthatfailureofanysinglecontrolsystemsystems to the extent that failure of any single control system component or channel, or failure or removal from service of any single protection system component or channel which is commontothecontrolandprotectionsystemsleavesintactacommon to the control and protection systems leaves intact a system satisfying all reliability, redundancy, and independence requirements of the protection system | | GDC 24 -Se paration of protection and control p p"The protection system shall be separated from control systemstotheextentthatfailureofanysinglecontrolsystemsystems to the extent that failure of any single control system component or channel, or failure or removal from service of any single protection system component or channel which is commontothecontrolandprotectionsystemsleavesintactacommon to the control and protection systems leaves intact a system satisfying all reliability, redundancy, and independence requirements of the protection system |
| ."Typical Configurations: | | ."Typical Configurations: |
| *1outof21 out of 2*2 out of 3 vs 1 out of 3 | | *1outof2 1 out of 2*2 out of 3 vs 1 out of 3 |
| *2 out of 4 | | *2 out of 4 |
| *1 out of 2 taken twice 6 | | *1 out of 2 taken twice 6 |
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| .Provisions shall be included so that this requirement can still be met ifachannelisbypassedorremovedfromservicefortestor if a channel is bypassed or removed from service for test or maintenance purposes.Acceptable provisions include reducing the required coincidence, defeating the control signals taken from the redundant channels | | .Provisions shall be included so that this requirement can still be met ifachannelisbypassedorremovedfromservicefortestor if a channel is bypassed or removed from service for test or maintenance purposes.Acceptable provisions include reducing the required coincidence, defeating the control signals taken from the redundant channels |
| , or initiatin g a protective action from the ,gpbypassed channel." | | , or initiatin g a protective action from the ,gpbypassed channel." |
| 7 IEEE 279-1971Clause 4.11, "Channel Bypass or Removal from Operation,"states:"The system shall be desi gned to permit any one channel to be ygpymaintained, and when required, tested or calibrated during power operation without initiating a protective action at the systems level. | | 7 IEEE 279-1971Clause 4.11, "Channel Bypass or Removal from Operation,"states:"The s ystem shall be desi gned to p ermit an y one channel to be ygpymaintained, and when required, tested or calibrated during power operation without initiating a protective action at the systems level. |
| During such operation the active parts of the system shall of themselves continue to meet the single failure criterion | | During such operation the active parts of the system shall of themselves continue to meet the single failure criterion |
| .Exception: "One-out-of-two" systems are permitted to violate the single failure criteria during channel bypass provided that acceptable reliability of operation can be otherwise demonstrated. | | .Exception: "One-out-of-two" systems are permitted to violate the single failure criteria during channel bypass provided that acceptable reliability of operation can be otherwise demonstrated. |
| For example, the bypass time interval required for a test, calibration, or maintenance operation could be shown to be short thtthbbilitffilfthtihlldb that the probability of failure of the active channel would be commensurate with the probability of failure of the "one-out-of-two" system during its normal interval between tests." | | For example, the bypass time interval required for a test, calibration, or maintenance operation could be shown to be short thtthbbilitffilfthtihlldb th a t the pro b a bilit y o f f a ilure o f th e ac tive c h anne l wou ld b e commensurate with the probability of failure of the "one-out-of-two" system during its normal interval between tests." |
| 8 IEEE279to603Mapping IEEE 279 to 603 MappingIEEE279-1971IEEE603-1991IEEE 2791971IEEE 6031991Clause 3Clause 4 ClCl0Clause 4.1Clause 5.0Clause 4.2Clause 5.1Clause 4.7.1Clause 5.6.3.1(1)Clause472Clause5631(2) | | 8 IEEE279to603Mapping IEEE 279 to 603 MappingIEEE279-1971IEEE603-1991 IEEE 279 1971 IEEE 603 1991Clause 3Clause 4 ClCl0 Clause 4.1 Clause 5.0Clause 4.2Clause 5.1Clause 4.7.1Clause 5.6.3.1(1)Clause472Clause5631(2) |
| Clause 4.7.2Clause 5.6.3.1(2)Clause 4.7.3Clause 5.6.3.3Cl474Cl63Clause 4.7.4Clause 6.39}} | | Clause 4.7.2 Clause 5.6.3.1(2)Clause 4.7.3Clause 5.6.3.3Cl474Cl63 Cl ause 4.7.4 Cl ause 6.3 9}} |
Letter Sequence Meeting |
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TAC:MF3240, Provide RISK-INFORMED Extended Completion Times - RITSTF Initiative 4B (Open) |
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MONTHYEARDCL-13-106, License Amendment Request 13-02 - Revision to Technical Specifications to Adopt Risk Informed Completion Times TSTF-505. Revision 1. Provide Risk-Informed Extended Completion Times-RITSTF Initiative 482013-11-25025 November 2013 License Amendment Request 13-02 - Revision to Technical Specifications to Adopt Risk Informed Completion Times TSTF-505. Revision 1. Provide Risk-Informed Extended Completion Times-RITSTF Initiative 48 Project stage: Request ML14059A1592014-02-28028 February 2014 NRR E-mail Capture - Acceptance Review e-mail for MF3240 and MF3241 - Revision to TS to Adopt Risk Informed Completion Times TSTF-505. Rev. 1 Project stage: Acceptance Review ML14319A0062014-11-13013 November 2014 NRR E-mail Capture - Diablo Canyon Proposed Amendment Using TSTF-505, Rev. 1 Project stage: Other DCL-14-110, One-Hundred-Twenty-Day Response to NRC Request for Additional Information - National Fire Protection Association Standard 805, Part 1 of 22014-11-26026 November 2014 One-Hundred-Twenty-Day Response to NRC Request for Additional Information - National Fire Protection Association Standard 805, Part 1 of 2 Project stage: Response to RAI ML14339A6292014-12-0505 December 2014 NRR E-mail Capture - Target Date for Response to the RAI Re. Proposed Amendment Using TSTF-505, Rev. 1 Project stage: RAI ML15050A1952015-02-18018 February 2015 NRR E-mail Capture - Diablo Canyon - RAI on Instrumentation and Controls for the Proposed TSTF-505 Amendment Project stage: RAI ML15180A3882015-06-29029 June 2015 NRR E-mail Capture - Diablo Canyon 1 and 2 - RAIs for LAR Associated with TSTF-505, Rev. 1 Project stage: RAI ML15232A0102015-08-0404 August 2015 Diablo Canyon Power Plant - Risk-Informed Technical Specification Completion Times (TSTF-505) License Amendment Request: August 4, 2015 Project stage: Request ML15216A4112015-08-0404 August 2015 TSTF-505: August 4, 2015 Public Meeting Project stage: Meeting ML15233A0052015-09-0909 September 2015 Summary of Meeting with Pacific Gas and Electric to Discuss Diablo Canyon, Units 1 & 2 License Amendment Request to Adopt Risk-Informed Completion Times, TSTF-505, Revision 1, Provide Risk-Informed Extended Completion Times-RITSTF. Initiati Project stage: Meeting 2014-02-28
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Category:Meeting Briefing Package/Handouts
MONTHYEARML24036A3382024-02-0505 February 2024 Environmental Scoping Meeting for the Diablo Canyon License Renewal Application - February 8 Meeting Slides ML24030A4672024-01-30030 January 2024 Environmental Scoping Meeting for the Diablo Canyon License Renewal Application - February 1 Meeting Slides ML23249A1592023-09-13013 September 2023 License Renewal Application Pre-Application Meeting: September 13, 2023 ML23255A0012023-09-13013 September 2023 PG&E Slides for 9/13 Public Meeting Related to Diablo Canyon License Renewal ML23174A0562023-06-26026 June 2023 Slides for TSTF-505 Pre-Submittal Public Teleconference 6-26-2023 ML23143A0882023-05-24024 May 2023 May 24, 2023, Public Meeting Slides Related to Diablo Canyon License Renewal ML23118A0902023-05-0303 May 2023 May 3, 2023, Diablo Public Meeting Slides ML23143A0952023-05-0303 May 2023 May 3, 2023, Diablo Public Meeting Slides for PG&E Presentation ML23079A0452023-03-16016 March 2023 RIC 2023 Slides - Maureen Zawalick TH19 ML22339A1022022-12-0505 December 2022 Pg_E Presentation for NRC Public Meeting ML22200A0712022-07-21021 July 2022 Post-Shutdown Decommissioning Activities Report Public Meeting Slides - July 21, 2022 ML22200A0722022-07-21021 July 2022 PG&E Slides for Post-Shutdown Decommissioning Activities Report Public Meeting, Site-Specific Decommissioning Cost Estimate, and Irradiated Fuel Management Plan - July 21, 2022 ML21223A0842021-08-11011 August 2021 Slides for Post Shutdown EP pre-submittal Public Teleconference 8-30-2021 ML21060B1872020-01-26026 January 2020 Enclosure 3 - 1-26-21 Diablo Canyon Renewal pre-app Meeting Slides ML19165A0092019-06-14014 June 2019 Pre-Submittal Meeting - Presentation Slides ML18333A1092018-11-28028 November 2018 Presentation Slides for Diablo Public Meeting to Discuss Proposed Exemption Request for Decommissioning Funds ML17296A2222017-08-29029 August 2017 Presentation on Reactor Decommissioning for the August 29, 2017 at Congressman Salud Carbajal'S Public Meeting at San Luis Obispo Near Diablo Canyon ML15232A0102015-08-0404 August 2015 Diablo Canyon Power Plant - Risk-Informed Technical Specification Completion Times (TSTF-505) License Amendment Request: August 4, 2015 ML15216A4112015-08-0404 August 2015 TSTF-505: August 4, 2015 Public Meeting ML15216A4082015-08-0404 August 2015 Diablo Canyon Power Plant - Risk-Informed Technical Specification Completion Times (TSTF-505) License Amendment Request: August 4, 2015 ML15209A9442015-07-28028 July 2015 June 24, 2015, Summary of Annual Assessment Meeting with Pacific Gas and Electric and Public Open House Regarding Diablo Canyon Power Plant 2014 Performance ML15202A0982015-07-21021 July 2015 Slides for the August 5, 2015 Diablo Canyon Power Plant License Renewal Application Public Scoping Meeting ML15117A0692015-04-28028 April 2015 Pacific Gas and Electric Co. April 28, 2015, Public Meeting Slides for Diablo Canyon Seismic Hazard Reevaluation ML15117A2262015-04-28028 April 2015 Nuclear Regulatory Commission April 28, 2015, Public Meeting Slides for Diablo Canyon Seismic Hazard Reevaluation ML15035A0062015-02-0404 February 2015 Meeting Presentation, Diablo Canyon Power Plant Process Protection System Replacement Lessons Learned Using ISG 6 NRC Meeting on Digital I&C. ML15029A0942015-02-0303 February 2015 Alternate Source Term Pre- Submittal Meeting on February 3, 2015 (TAC Nos. MF5596 and MF5597). AST LAR NRC Meeting Presentation ML15014A2232015-01-14014 January 2015 Slides Regulatory Conference - January 14, 2015 ML14188A9702014-07-0808 July 2014 14-07-08 ISG-06 Experience Presentation July 8 2014 Digital IC Meeting ML14155A3742014-06-0404 June 2014 May 22, 2014, Summary of Annual Assessment Meeting with Pacific Gas and Electric Regarding Diablo Canyon Power Plant 2013 Performance ML14077A2872014-03-18018 March 2014 Transcript of the 612th ACRS Meeting, March 6, 2014 (Open) Pages 1-317 ML13150A1712013-11-19019 November 2013 1978 - Rhrp Cavitation ML13274A5142013-10-0202 October 2013 License Slides, 10/2/13 Pre-Application Meeting with Pacific Gas and Electric Company to Discuss Upcoming Structural Weld Overlay Relief Request to Use an Alternative to Disposition Detected Laminar Indications at Diablo Canyon, Unit 2 (TAC ML13269A0052013-09-26026 September 2013 Licensee Slides for 9/26/13 Meeting to Discuss Amendment Request to Adopt Technical Specifications Task Force TSTF-505, Provide Risk-Informed Extended Completion Times, RITSTF Initiative 4B ML13268A0022013-09-25025 September 2013 Slide Presentation for 9/25/13 Preapplication Meeting - Use of Leak-before-break for Fuel Structural Analyses and Coolable Geometry ML13268A0052013-09-24024 September 2013 Slide Presentation for 9/24/13 Pre-application Meeting, Diesel Generator License Amendment Request ML13159A0092013-06-0404 June 2013 Notable Failures in Nondustructive Testing - June 4, 2013 Public Meeting ML13066A7402013-03-0707 March 2013 Licensee Slides from 3/7/13 Pre-Application Meeting with Pacific Gas and Electric Company(Tac MF0687 & MF0688) ML13044A7352013-02-12012 February 2013 Licensee Slides from 2/12/13 Public Meeting to Discuss License Amendment Requests for Degraded Voltage Protection and Control Room Dose Analysis of Record at Diablo Canyon, Units 1 and 2 ML13024A4052013-01-24024 January 2013 Licensee Slides from 1/24/13 Meeting to Discuss Offsite Power ML13018A1342013-01-15015 January 2013 Pacific Gas and Electric Handouts from January 15, 2013 Meeting Regarding Pending License Amendment Request Related to Diesel Generator Technical Specifications ML12355A1612012-12-18018 December 2012 PG&E Handouts from the December 18, 2012, Meeting with the NRC Related to Emergency Core Cooling System Evaluations (TAC Nos. MF0313 and MF0315) ML12347A3102012-12-12012 December 2012 Summary of Meeting with Public on Diablo Canyon Power Plant ML12311A0492012-09-18018 September 2012 Part 26 Public Meeting NEI Presentation Slides ML12226A2552012-08-0707 August 2012 License Slides from 8/7/12 Meeting with Pacific Gas and Electric Regarding Future License Amendment Associated with Diesel Generator Technical Specifications ML12193A1412012-07-25025 July 2012 6/28/2012 Summary of Meeting with Pacific Gas and Electric to Discuss Digital Replacement of Process Protection System at Diablo Canyon, Units 1 and 2 and Presubmittal of TSTF-493 Option B License Amendment Request (TAC ME7522-ME7523, ME851 ML12157A2722012-06-11011 June 2012 5/31/2012 Summary of Telephone Conference with Licensees Regarding Near Term Task Force Recommendation 2.1 Seismic Reevaluations - Diablo Canyon, 1 and 2, San Onofre, Units 2 and 3, Columbia Generating Station, and Palo Verde, Units 1, 2, a ML1202500572012-01-18018 January 2012 Meeting Slides Process Protection System Replacement LAR Acceptance Review Meeting Presentation ML1202500792012-01-18018 January 2012 Project Plan for Diablo Canyon Digital Upgrade of Process Protection System LAR Review ML1117205702011-06-20020 June 2011 Licensee Slides from 6/20/11 Pre-Licensing Meeting on Seismic License Amendment Request ML1116405342011-06-0707 June 2011 Slides from Meeting with Pacific Gas and Electric Company Regarding Diablo Canyon Process Protection System Replacement 2024-02-05
[Table view] Category:Slides and Viewgraphs
MONTHYEARML24036A3382024-02-0505 February 2024 Environmental Scoping Meeting for the Diablo Canyon License Renewal Application - February 8 Meeting Slides ML24030A4672024-01-30030 January 2024 Environmental Scoping Meeting for the Diablo Canyon License Renewal Application - February 1 Meeting Slides ML23255A0012023-09-13013 September 2023 PG&E Slides for 9/13 Public Meeting Related to Diablo Canyon License Renewal ML23249A1592023-09-13013 September 2023 License Renewal Application Pre-Application Meeting: September 13, 2023 ML23174A0562023-06-26026 June 2023 Slides for TSTF-505 Pre-Submittal Public Teleconference 6-26-2023 ML23143A0882023-05-24024 May 2023 May 24, 2023, Public Meeting Slides Related to Diablo Canyon License Renewal ML23118A0902023-05-0303 May 2023 May 3, 2023, Diablo Public Meeting Slides ML23143A0952023-05-0303 May 2023 May 3, 2023, Diablo Public Meeting Slides for PG&E Presentation ML23079A0452023-03-16016 March 2023 RIC 2023 Slides - Maureen Zawalick TH19 ML22339A1022022-12-0505 December 2022 Pg_E Presentation for NRC Public Meeting ML22236A5472022-08-24024 August 2022 NRC Slides for Decommissioning Engagement Panel 8-24-2022 Meeting ML22200A0712022-07-21021 July 2022 Post-Shutdown Decommissioning Activities Report Public Meeting Slides - July 21, 2022 ML22200A0722022-07-21021 July 2022 PG&E Slides for Post-Shutdown Decommissioning Activities Report Public Meeting, Site-Specific Decommissioning Cost Estimate, and Irradiated Fuel Management Plan - July 21, 2022 ML21223A0842021-08-11011 August 2021 Slides for Post Shutdown EP pre-submittal Public Teleconference 8-30-2021 ML20310A2792020-11-0505 November 2020 Slides for Defueled TS Pre-Submittal Public Teleconference November 24, 2020 (L-2020-LRM-0101) ML21060B1872020-01-26026 January 2020 Enclosure 3 - 1-26-21 Diablo Canyon Renewal pre-app Meeting Slides ML19233A0722019-08-27027 August 2019 NEIMA Meeting Slides Public ML18295A0732018-10-24024 October 2018 Final Diablo Canyon Decommissioning Engagement Panel Meeting Oct 24 2018 ML17296A2222017-08-29029 August 2017 Presentation on Reactor Decommissioning for the August 29, 2017 at Congressman Salud Carbajal'S Public Meeting at San Luis Obispo Near Diablo Canyon ML16335A4392016-11-30030 November 2016 PG&E Reg Conference Presentation - NRC-11152016 ML15232A0102015-08-0404 August 2015 Diablo Canyon Power Plant - Risk-Informed Technical Specification Completion Times (TSTF-505) License Amendment Request: August 4, 2015 ML15216A4112015-08-0404 August 2015 TSTF-505: August 4, 2015 Public Meeting ML15216A4082015-08-0404 August 2015 Diablo Canyon Power Plant - Risk-Informed Technical Specification Completion Times (TSTF-505) License Amendment Request: August 4, 2015 ML15209A9442015-07-28028 July 2015 June 24, 2015, Summary of Annual Assessment Meeting with Pacific Gas and Electric and Public Open House Regarding Diablo Canyon Power Plant 2014 Performance ML15202A0982015-07-21021 July 2015 Slides for the August 5, 2015 Diablo Canyon Power Plant License Renewal Application Public Scoping Meeting ML15117A2262015-04-28028 April 2015 Nuclear Regulatory Commission April 28, 2015, Public Meeting Slides for Diablo Canyon Seismic Hazard Reevaluation ML15117A0692015-04-28028 April 2015 Pacific Gas and Electric Co. April 28, 2015, Public Meeting Slides for Diablo Canyon Seismic Hazard Reevaluation ML15035A0062015-02-0404 February 2015 Meeting Presentation, Diablo Canyon Power Plant Process Protection System Replacement Lessons Learned Using ISG 6 NRC Meeting on Digital I&C. ML15029A0942015-02-0303 February 2015 Alternate Source Term Pre- Submittal Meeting on February 3, 2015 (TAC Nos. MF5596 and MF5597). AST LAR NRC Meeting Presentation ML15014A2232015-01-14014 January 2015 Slides Regulatory Conference - January 14, 2015 ML14195A3742014-07-10010 July 2014 Update of Industry Actions Related to Diablo Canyon OE ML14188A9702014-07-0808 July 2014 14-07-08 ISG-06 Experience Presentation July 8 2014 Digital IC Meeting ML14155A3742014-06-0404 June 2014 May 22, 2014, Summary of Annual Assessment Meeting with Pacific Gas and Electric Regarding Diablo Canyon Power Plant 2013 Performance ML14077A2872014-03-18018 March 2014 Transcript of the 612th ACRS Meeting, March 6, 2014 (Open) Pages 1-317 ML13150A1712013-11-19019 November 2013 1978 - Rhrp Cavitation ML13150A1812013-11-19019 November 2013 Trade-Off Between Tank Vortexing Margin and ECCS Function ML13274A5142013-10-0202 October 2013 License Slides, 10/2/13 Pre-Application Meeting with Pacific Gas and Electric Company to Discuss Upcoming Structural Weld Overlay Relief Request to Use an Alternative to Disposition Detected Laminar Indications at Diablo Canyon, Unit 2 (TAC ML13269A0052013-09-26026 September 2013 Licensee Slides for 9/26/13 Meeting to Discuss Amendment Request to Adopt Technical Specifications Task Force TSTF-505, Provide Risk-Informed Extended Completion Times, RITSTF Initiative 4B ML13268A0022013-09-25025 September 2013 Slide Presentation for 9/25/13 Preapplication Meeting - Use of Leak-before-break for Fuel Structural Analyses and Coolable Geometry ML13268A0052013-09-24024 September 2013 Slide Presentation for 9/24/13 Pre-application Meeting, Diesel Generator License Amendment Request ML13159A0092013-06-0404 June 2013 Notable Failures in Nondustructive Testing - June 4, 2013 Public Meeting ML13066A7402013-03-0707 March 2013 Licensee Slides from 3/7/13 Pre-Application Meeting with Pacific Gas and Electric Company(Tac MF0687 & MF0688) ML13044A7352013-02-12012 February 2013 Licensee Slides from 2/12/13 Public Meeting to Discuss License Amendment Requests for Degraded Voltage Protection and Control Room Dose Analysis of Record at Diablo Canyon, Units 1 and 2 ML13024A4052013-01-24024 January 2013 Licensee Slides from 1/24/13 Meeting to Discuss Offsite Power ML13018A1342013-01-15015 January 2013 Pacific Gas and Electric Handouts from January 15, 2013 Meeting Regarding Pending License Amendment Request Related to Diesel Generator Technical Specifications ML12355A1612012-12-18018 December 2012 PG&E Handouts from the December 18, 2012, Meeting with the NRC Related to Emergency Core Cooling System Evaluations (TAC Nos. MF0313 and MF0315) ML12311A0492012-09-18018 September 2012 Part 26 Public Meeting NEI Presentation Slides ML12226A2552012-08-0707 August 2012 License Slides from 8/7/12 Meeting with Pacific Gas and Electric Regarding Future License Amendment Associated with Diesel Generator Technical Specifications ML12193A1412012-07-25025 July 2012 6/28/2012 Summary of Meeting with Pacific Gas and Electric to Discuss Digital Replacement of Process Protection System at Diablo Canyon, Units 1 and 2 and Presubmittal of TSTF-493 Option B License Amendment Request (TAC ME7522-ME7523, ME851 ML12157A2722012-06-11011 June 2012 5/31/2012 Summary of Telephone Conference with Licensees Regarding Near Term Task Force Recommendation 2.1 Seismic Reevaluations - Diablo Canyon, 1 and 2, San Onofre, Units 2 and 3, Columbia Generating Station, and Palo Verde, Units 1, 2, a 2024-02-05
[Table view] |
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TSTF-505 TSTF-505 Norbert Carte (NRC/NRR)August42015 August 4 , 2015 Concerns Concerns*MethodologytodeterminewhenalossoffunctionMethodology to determine when a loss of function has occurred is not described.
- OperatorswillneedtomakethisdeterminationOperators will need to make this determination within one hour after the components are declared inoperable.
- Some regulatory requirements may not be explicitly modeled or addressed in the PRA.
- Reductions in redundancy and/or coincidence may introduce new events to be protected against.
2 When can a RICT be used?
- NEI 06-09 does not allow a RICT for a total loss of function, but does not have detailed guidance on what constitutes a total loss of g function*TSTF-505 allows two or more channels to be inoperable
- When Components are shared between protection and control systems, how many need to be PRA Functional or Operable in order fortherenottobeatotallossoffunction?for there not to be a total loss of function?*Two Types of FunctionsIdentifiedinTSTablesforRTS&ESFAS
-Identified in TS Tables for RTS & ESFAS-Specific functions identified in regulatory requirements
Functional Requirements (StifPttidCtl)(Separa tion o f P ro t ec tion an d C on t ro l)*GDCs 21 & 24
- Effectively increases redundancy requirementsIEEE279 1971*IEEE 279-1971-Explicit Requirement to protect against
- Single Failures of shared equipment (extra redundancy)
- Events (alternate channels) -Not discussed below
- IEEE 603-1991SiiltIEEE279 1971-Si m il ar t o IEEE 279-1971 4 GDC 21-Protectionsystemreliability
-GDC 21Protection system reliability
-"The protection system shall be designed for high functionalreliabilityRedundancyandindependence functional reliability
-Redundancy and independencedesigned into the protection system shall be sufficient to assure that (1) no sin gle failure results in loss of the ()gprotection function -"Typical Configurations:
GDC 24 -Se paration of protection and control p p"The protection system shall be separated from control systemstotheextentthatfailureofanysinglecontrolsystemsystems to the extent that failure of any single control system component or channel, or failure or removal from service of any single protection system component or channel which is commontothecontrolandprotectionsystemsleavesintactacommon to the control and protection systems leaves intact a system satisfying all reliability, redundancy, and independence requirements of the protection system
."Typical Configurations:
- 1outof2 1 out of 2*2 out of 3 vs 1 out of 3
IEEE 279-19714.7, "Control and Protection System Interaction "Clause 4.7.3, "Single Random Failure," states:"Where a single random failure can cause a control system action thatresultsinageneratingstationconditionrequiringprotectivethat results in a generating station condition requiring protective action and can also prevent proper action of a protection system channel designed to protect against the condition, the remaining redundantprotectionchannelsshallbecapableofprovidingtheredundant protection channels shall be capable of providing the protective action even when degraded by a second random failure
.Provisions shall be included so that this requirement can still be met ifachannelisbypassedorremovedfromservicefortestor if a channel is bypassed or removed from service for test or maintenance purposes.Acceptable provisions include reducing the required coincidence, defeating the control signals taken from the redundant channels
, or initiatin g a protective action from the ,gpbypassed channel."
7 IEEE 279-1971Clause 4.11, "Channel Bypass or Removal from Operation,"states:"The s ystem shall be desi gned to p ermit an y one channel to be ygpymaintained, and when required, tested or calibrated during power operation without initiating a protective action at the systems level.
During such operation the active parts of the system shall of themselves continue to meet the single failure criterion
.Exception: "One-out-of-two" systems are permitted to violate the single failure criteria during channel bypass provided that acceptable reliability of operation can be otherwise demonstrated.
For example, the bypass time interval required for a test, calibration, or maintenance operation could be shown to be short thtthbbilitffilfthtihlldb th a t the pro b a bilit y o f f a ilure o f th e ac tive c h anne l wou ld b e commensurate with the probability of failure of the "one-out-of-two" system during its normal interval between tests."
8 IEEE279to603Mapping IEEE 279 to 603 MappingIEEE279-1971IEEE603-1991 IEEE 279 1971 IEEE 603 1991Clause 3Clause 4 ClCl0 Clause 4.1 Clause 5.0Clause 4.2Clause 5.1Clause 4.7.1Clause 5.6.3.1(1)Clause472Clause5631(2)
Clause 4.7.2 Clause 5.6.3.1(2)Clause 4.7.3Clause 5.6.3.3Cl474Cl63 Cl ause 4.7.4 Cl ause 6.3 9