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Category:Request for Additional Information (RAI)
MONTHYEARML23334A1502023-11-30030 November 2023 NRC Request for Additional Information Re. Susquehanna Relief Request RR-02 ML23277A0412023-10-0505 October 2023 Notification of Commercial Grade Dedication Inspection (05000387/2024011 and 05000388/2024011) and Request for Information ML23013A2082023-01-13013 January 2023 Request for Additional Information ML22146A1022022-05-26026 May 2022 Information Request for the Cyber Security Baseline Inspection, Notification to Perform Inspection 05000387/2022404 and 05000388/2022404 ML22146A0742022-05-25025 May 2022 NRR E-mail Capture - NRC Request for Additional Information - Susquehanna License Amendment Request ML22111A3132022-04-21021 April 2022 NRR E-mail Capture - NRC Request for Additional Information - Susquehanna License Amendment Request ML22041A1562022-02-10010 February 2022 Information Request for a Triennial Baseline Design Bases Assurance Inspection (Team); Inspection Report 05000387/2022013 and 05000388/2022013 ML21316A1242021-11-18018 November 2021 Supplemental Information Needed for Acceptance of Requested Licensing Action Regarding Emergency Core Cooling Technical Specifications ML20056E4392020-02-21021 February 2020 Ti 2515/194 Inspection Documentation Request ML20010D2012020-01-0909 January 2020 Request for Additional Information Related to Request to Allow Application of Framatome Analysis Methodologies Necessary to Support a Planned Transition to Atrium 11 Fuel Under Maximum ML19319B1922019-11-14014 November 2019 NRR E-mail Capture - RAI for Susquehanna, 1 and 2 License Amendment Request - Replace the Emergency Service Water System and Residual Heat Removal Service Water System ML19319A0092019-11-14014 November 2019 NRR E-mail Capture - Draft RAI for SSES Units 1 and 2 LAR to Replace ESW Piping ML19128A0232019-05-0707 May 2019 Request for Additional Information: Susquehanna Steam Electric Station, Units 1 and 2 License Amendment Request for ESW Piping Replacement ML18352B1832018-12-13013 December 2018 Enclosurequest for Additional Information (Letter to K. Cimorelli Request for Additional Information Regarding Susquehanna Nuclear, Llc'S Decommissioning Funding Plan Update for Susquehanna Steam Electric Station Independent Spent Fuel Stor ML17180A2002017-07-0707 July 2017 Request for Additional Information Regarding License Amendment Request to Revise Diesel Generator Surveillance Requirements with New Steady State Voltage and Frequency Limits ML17059D2142017-03-0606 March 2017 Susquehanna Steam Electric Station - Supplemental Information Needed for Acceptance of Requested Licensing Action Re: License Amendment Request to Revise Diesel Generator Surveillance Requirements with New Steady State Voltage Frequency Limits ML16251A0652016-09-0909 September 2016 Susquehanna Steam Electric Station, Unit 2 - RAI Regarding Temporary Change of Unit 2, Technical Specifications 3.7.1 & 3.8.7 to Allow Replacement of Unit 1, 480 Volt Engineered Safeguard System Load Center Transformers(CAC No. MF7298) ML16245A2052016-09-0101 September 2016 Draft Request for Additional Information Replacement of Load Center Transformers ML16243A0952016-08-30030 August 2016 Draft Request for Additional Information Application for Approval of Indirect Transfer of Control of Licenses ML16060A2302016-03-24024 March 2016 Acceptance of Requested Licensing Action License Amendment Request for Temporary Change of Unit 2 Technical Specifications 3.71 and 3.87 to Allow Replacement of Unit 1 480V Ess Load Center Transformers ML15316A5632015-11-13013 November 2015 Request for Additional Information Regarding Proposed Relief Requests for the Third 10-Year Inservice Inspection Interval(Cac Nos. MF6302 Through MF6307) ML15292A1782015-10-15015 October 2015 TSTF-425 LAR Draft 3rd RAIs ML15230A0802015-08-26026 August 2015 Request for Additional Information Regarding License Amendment Request to Adopt NEI 99-01, Revision 6, EAL Scheme Change ML15209A9742015-08-24024 August 2015 Request for Additional Information License Amendment Request to Adopt Technical Specifications Task Force Traveler (TSTF)-425 ML15229A2002015-08-17017 August 2015 E-mail from J. Whited to J. Jennings SSES Draft TSTF-425 RAIs ML15229A2092015-08-17017 August 2015 SSES Draft Request for Additional Information Licensee Request to Adopt TSTF-425 ML15230A0462015-08-17017 August 2015 Draft RAIs SSES EAL Scheme Change LAR in Accordance with NEI 99-01 Rev 6 ML15183A3502015-07-0202 July 2015 SSES Relief Requests 3RR-19, 3RR-20, and 3RR-21 Draft Identified Information Insufficiencies (TAC Nos. MF6302 Through MF6307) ML15103A3962015-05-22022 May 2015 Request for Additional Information License Amendment Request to Adopt Technical Specifications Task Force Traveler (TSTF)-425 (TAC Nos. MF5151 and MF5152) ML15128A5162015-05-0808 May 2015 SSES Draft Request for Additional Information LAR for Implementation of TSTF-425 ML15128A5092015-05-0808 May 2015 E-mail from J. Whited to D. Filchner SSES Draft Request for Additional Information LAR for Implementation of TSTF-425 ML15008A4702015-01-30030 January 2015 Request for Additional Information Request to Revise Technical Specification 3.4.10, RCS Pressure and Temperature (P/T) Limits. ML15016A2742015-01-16016 January 2015 Draft RAIs License Amendment Request for Change to TS 3.4.10 P/T Limits (TAC Nos. MF4597 and MF45980) ML15016A2722015-01-16016 January 2015 E-mail from J. Whited to D. Filchner Draft RAIs License Amendment Request for Change to TS 3.4.10 P/T Limits (TAC Nos. MF4597 and MF45980) ML14343A9842015-01-0808 January 2015 Request for Additional Information Relief Request 4RR-01 ML14345A2412014-12-16016 December 2014 Request for Additional Information Request for Order Approving Indirect Transfer of Control and Conforming License Amendments ML14346A1022014-12-12012 December 2014 Draft License Transfer Revised 2nd RAIs ML14346A4022014-12-12012 December 2014 Draft RAIs Relief Request 4RR-01 ML14346A4012014-12-12012 December 2014 E-mail from J. Whited to D. Filchner Susquehanna Steam Electric Station Draft RAIs Relief Request 4RR-01 ML14346A1002014-12-12012 December 2014 E-mail from J. Whited to R. Sgarro Susquehanna Steam Electric Station Draft License Transfer Revised 2nd RAIs ML14342A8082014-12-0808 December 2014 E-mail from J. Whited to R. Sgarro (PPL) SSES Units 1 and 2 Draft RAIs Application for Approval of Indirect Transfer of Control of Licenses ML14342A8132014-12-0808 December 2014 SSES Units 1 and 2 Draft RAIs Application for Approval of Indirect Transfer of Control of Licenses ML14233A2772014-08-27027 August 2014 Request for Additional Information License Amendment Request to Change the Low Pressure Safety Limit ML14233A3392014-08-21021 August 2014 Draft RAIs for Susquehanna Steam Electric Station Units 1 and 2 License Amendment Request for Changes to the Low Pressure Safety Limits ML13298A7582014-03-0707 March 2014 Request for Additional Information Regarding Request for Changes to Technical Specification Surveillance Requirements to Increase Diesel Generator Minimum Steady State Voltage (TAC ME9607 and ME960) ML13298A7812014-03-0707 March 2014 Request for Additional Information Regarding Request for Changes to Technical Specification Surveillance Requirement 3.8.1.19 to Increase Diesel Generator Minimum Steady State Frequency (TACs ME9609. ML14013A1502014-01-31031 January 2014 Request for Additional Information Regarding Relief Requests for the Fourth 10-Year Inservice Testing Interval ML14024A4752014-01-24024 January 2014 Draft 4th IST RRs 1RR05 RAIs ML13338A4422013-12-19019 December 2013 Request for Additional Information Regarding Relief Requests for the Fourth Ten-Year Inservice Inspection Interval ML13312A9142013-12-18018 December 2013 Request for Additional Information Regarding Request for Changes to Technical Specification Surveillance Requirements 3.5.1.12 2023-11-30
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DRAFT REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED LICENSE AMENDMENT REQUEST TO CHANGE SURVEILLANCE REQUIREMENT 3.5.1.12 PPL SUSQUEHANNA, LLC SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 DOCKET NOS. 50-387 AND 50-388 By letter dated June 6, 2013,1 PPL Susquehanna, LLC (PPL) submitted a license amendment request for Susquehanna Steam Electric Station, Units 1 and 2 (SSES). The proposed amendment would change Technical Specification (TS) Surveillance Requirement (SR) 3.5.1.12 in TS 3.5.1 ECCS - Operating. Specifically, the proposed amendments would change the current TS requirement that "each [Automatic Depressurization System] ADS valve opens when manually actuated" to the requirement that "each ADS valve actuator strokes when manually actuated, Additionally, the surveillance frequency would change from "24 months on a STAGGERED TEST BASIS for each valve solenoid" to "24 months". To complete its review, the Nuclear Regulatory Commission (NRC) staff from the Division of Safety Systems, Technical Specifications Branch (STSB), and the Division of Engineering, Instrumentation and Controls Branch (EICB), and Component Performance, None-Destructive Examination (NDE),
and Testing Branch (EPNB) request responses to the below questions.
EICB RAI 1: Provide a description of Susquehannas operating experience with single and repeated open cycling action with the Automatic Depressurization System (ADS) valves that develop the leakage. The discussion would assist the staff in understanding and considering the problem being experienced.
EICB RAI 2: Justify the technical analysis as to why the valves appear to operate within their normal design per this statement: design appears to be adequate and is not considered to be a cause for ADS valve seat leakage as a result of manual operation of the ADS valves, and according to the reference citation 7.3, under the discussion, please explain the apparent contradiction to this statement: The licensee believes that the failure of the S/RV is related to the manufacturing tolerances of the valve stem and piston assembly and to the lengthy service time without adequate inspection and maintenance. It appears that ADS valves with mechanical issues per design and wear require higher inspection surveillance.
EICB RAI 3: The cited material states that the design for a Target Rock valve does degrade and requires periodic inspection, which could mean an increased validation of valve operation is best done with the ADS valve connected to the relief positioner, yet the valves cited in the LAR are identified as Crosby valves.
1 Agencywide Documents Access and Management System Accession No. ML13158A096 DRAFT
EICB RAI 4: Provide drawings/sketches/P&IDs depicting detailed design of the physical installation of the ADS valve the licensee wants to disconnect from the positioner, so the staff can verify the ADS actuator is disconnected from the valve to ensure no damage is done to the valve seat or to the valve internals EICB RAI 5: Discuss the ADS valve position indication feedback validation testing, when following the proposed change to SR 3.5.1.12.
EICB RAI 6: Provide further discussion on the S/RVs replaced under current practices for a 24 month cycle and how a main disk exercise test (referred to on page 3 of 7) performed on all S/RVs at least once every 6 years schedule and would ensure the main disks can freely open. This discussion would aid the staff in understanding the operating history of the S/RVs.
EICB RAI 7: Provide the cited document in reference 7.2 INPO Event Report, Level 3, 11-24, "Maintenance Error results in Uncontrolled Reactor Vessel Depressurization,"
dated July 26, 2011. The cited material is not available to the NRC in its entirety. Furthermore, the redacted INPO version states the valve failed open.
The staff would like to know the relevance to this proposed licensing amendment.
EPNB RAI 1 Provide a description and drawing of the Automatic Depressurization System (ADS) valve assembly including information on the actuator such as number and arrangement of solenoids and air system arrangement.
EPNB RAI 2 Are the actual installed actuators and solenoids shipped and tested with a given ADS valve during off-site bench testing?
EPNB RAI 3 Do the set point testing program and the valve control program referred to in Sections 1 and 3 of the referenced letter implement the requirements of American Society of Mechanical Engineers (ASME) operational manager(OM)
Code for the testing of the ADS valves? Describe the specific tests performed for these valves to comply with ASME OM Code, Mandatory Appendix I, paragraph I-3310.
EPNB RAI 4 Does the Susquehanna test program for the subject ADS valves fully implement the requirements of ASME OM Code Case OMN-17? In particular, are the valves disassembled and inspected after as-found set-pressure testing?
EPNB RAI 5 Do the tests performed to satisfy TS SR 3.5.1.11 and SR 3.5.1.12 actuate each solenoid independently for a given actuator?
EPNB RAI 6 Under the proposed new wording of SR 3.5.1.12, is the existing note still necessary that allows for a twelve hour delay in testing?
EPNB RAI 7 Does deletion of on a staggered test basis for each valve solenoid from the SR 3.5.1.12 Frequency requirement mean that each solenoid on each actuator will be individually tested every 24 months?
STSB RAI 1 10 CFR 50.36(c)(3), "Surveillance requirements," requires, in part, that SRs be established to ensure that the necessary quality of components is maintained, and that facility operation will be within safety limits.
DRAFT
The proposed SR changes would eliminate the TS requirement to verify that for the ADS valves to open during manual actuation of the ADS circuitry. When performing the testing in-situ as required by the current TSs, the testing verifies that the ADS valve components actuate as designed and discharge lines are not blocked. This test provides assurance that the necessary quality of components is maintained, and that facility operation will be within safety limits.
Please provide a description of the Quality Assurance and Foreign Material Exclusion methods that will be used to provide assurance that the ADS valves that have been bench-tested will actuate as designed and that discharge lines are not blocked once the valves are installed.
DRAFT