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Category:INTERNAL OR EXTERNAL MEMORANDUM
MONTHYEARML20205N9871999-04-14014 April 1999 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered on 990308-11 ML20203G0081999-02-12012 February 1999 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered on 981102-06 ML20211M5671997-10-0303 October 1997 Forwards Regulatory Documents Comprising Regulatory History of Notice of Proposed Rulemaking Entitled Financial Assurance Requirements for Decommissioning Nuclear Power Reactors, Which Amended 10CFR50,published in Fr on 970910 ML20149D7851997-07-14014 July 1997 Notification of Significant Licensee Meeting W/Util on 970731 in Arlington,Tx to Discuss Case Studies (Response Time & Reactor Feedwater Pump Trip Test) & Common Themes ML20137C9201997-03-20020 March 1997 Forwards Documentation of Meeting Conducted in Region 4 Office on 970225 to Discuss NRC Enforcement Policy as Applied to Nonescalated Enforcement ML20134P5931997-02-21021 February 1997 Forwards Order Imposing Civil Monetary Penalty for Transmittal to Ofc of Fr for Publication.W/O Encl ML20132F5421996-12-19019 December 1996 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered on 961007-11 ML20134E9191996-10-29029 October 1996 Forwards Rationale for Inital Plants Selected for Design Insps & for Plants Considered for Second Quarter FY97 Design Insps ML20203B9891995-11-20020 November 1995 Discusses OI Rept 4-95-032 Re Alleged False Statements by Fire Watches to NRC Inspectors.Oe Will Consider Matter Closed from Enforcement Perspective Unless Different View Received within 3 Wks of Date of This Memo ML20211M6231994-11-30030 November 1994 Provides Info to Commission on Status of Rulemaking Activities Re Power Reactor Decommissioning Cost Issues,Per 930714 SRM ML20236L5631994-08-10010 August 1994 Responds to Former Region V 930422 Request for NRR Evaluation of WPPSS Practices Associated W/Testing RHR Sys While Aligned in SPC Mode ML20056E5141993-08-12012 August 1993 Submits SALP Schedule for FY94 Per Mgt Directive 8.6 ML20056E4571993-08-0505 August 1993 Forwards Technical Review Rept Re, Tardy Licensee Actions Initiated Because of Delayed Replacement of Batteries in Uninterruptible Power Supplies at Plant ML20247G1561989-05-15015 May 1989 Forwards Director'S Decision 89-03 in Response to 2.206 Petition Re BWR Stability.Petition Filed by Hiatt on Behalf of Ocre Expressing Concerns Re 890309 Power Oscillattion Event & Requested Action W/Respect to All BWRs ML20245B6421989-04-15015 April 1989 Forwards Engineering Evaluation Rept on BWR Overfill Events Resulting in Steam Line Flooding.Though Little Actual Damage Experienced,Potential for Equipment Damage Believed to Exist & Any Damage Occurring Should Be Fixed Prior to Restart ML20245B6531989-04-15015 April 1989 Forwards Evaluation Rept on BWR Overfill Events Resulting in Flooding of Steam Lines.Events Determined to Involve Deficiencies in Control Sys ML20245B6191989-04-15015 April 1989 Forwards Evaluation Rept Re BWR Overfill Events Resulting in Steam Line Flooding.All Events Included Reactor Depressurization Followed by Uncontrolled Condensate or Condensate Booster Pumps Injection or Both ML20245B7501989-04-15015 April 1989 Forwards Engineering Evaluation Rept on BWR Overfill Events Resulting in Flooding of Steam Lines.Potential for Equipment Damage Believed to Exist & Any Damage Occurring Should Be Fixed Prior to Restart ML20147E3621988-02-28028 February 1988 Summary of 880223 Operating Reactors Events Meeting 88-008. List of Attendees,Tabulation of long-term Followup Assignments to Be Completed & Summary of Reactor Scrams Encl ML20195G7981987-07-31031 July 1987 Partially Deleted Memo Forwarding SALP Rept & Recommendations Re NRC Actions for Plant.W/O Encl IR 05000397/19870061987-07-0101 July 1987 Forwards Draft SALP Rept 50-397/87-06 for Feb-May 1987 for Review.Comments Requested at SALP Board Meeting Schedule for 870707 in Region V.Update of Tables 1-4 Included in Draft. W/O Rept ML20236B1451987-06-18018 June 1987 Forwards Response to DF Kirsch 870507 Memo Requesting Performance Analysis Info for Input to Facility SALP Rept. Review Results Provided in Encl.Encl Withheld ML20214M1381987-05-26026 May 1987 Provides Enforcement Guidance to Regions for Issues Re Control Room Habitability/Control Room Emergency Ventilation Sys Deficiencies.Summary of Plants Reviewed & Documents Describing Findings Encl ML20195G7931987-05-12012 May 1987 Forwards Insp & LER Data Tables for Use in Preparing Performance Analyses for Salp,Per DF Kirsch 870507 Memo. Tables Subj to Review & Comment Until SALP Process Complete. W/O Encls ML20214A0311987-05-12012 May 1987 Notifies of 870514 Briefing on Licensing & Operational Status of Plants Assigned to Project Directorate V,Including Diablo Canyon,Palo Verde,Rancho Seco,San Onfore,Trojan & WPPSS 2 ML20212M8601987-03-0909 March 1987 Forwards SER Re Concerns Identified in Plant Fire Protection Program,As Described in FSAR Through Amend 33.Concerns Resolved Except for Listed Items,Including Adequacy of Safe Shutdown Procedures.Review Excluded Amend 37 Items ML20154A2831986-12-13013 December 1986 Forwards Assessments by Enforcement Staff of Regional Performance in Enforcement Area from Jul-Nov 1985 ML20215G1361986-10-14014 October 1986 Summary of 861006 Operating Reactor Events Meeting 86-35 Re Events Since Last Meeting on 860929.Assignees Should Review Identified Responsibilities & Completion Dates & Advise If Dates Cannot Be Met.Attendance List & Viewgraphs Encl ML20215F2751986-10-0606 October 1986 Forwards Action Timetable Re Coordinated Approach to Resolution of Fire Protection Issues at Facility ML20209A8611986-09-0202 September 1986 Forwards Matls Needed to Complete Assignment During Emergency Preparedness Exercise on 860916-19.W/o Encl IR 05000397/19860121986-08-25025 August 1986 Notification of 860828 Meeting W/Util in Walnut Creek,Ca to Discuss Apparent Violations Involving Equipment Qualification (50-397/86-12),Region V Team Insp 50-397/86-11 & Control of Combustible Matls ML20204G4051986-08-0404 August 1986 Notification of 860909 Meeting W/Utils in Bethesda,Md to Discuss Nrc/Util Living Schedules,Util Performance,Legal Considerations,Tech Spec Improvements & Severe Accident Policy/Degraded Core Programs.Proposed Agenda Encl ML20207J2451986-07-16016 July 1986 Forwards Request for Addl Info Re Util Application to Amend Tech Spec 4.6.4.1 Concerning Drywell Vacuum Breakers,For Transmittal to Licensee.Receipt of Info After 860731 Will Require Rev to 860831 Anticipated Review Completion Date ML20058K6041986-07-0303 July 1986 Informs of Telcon on Status of EA-86-110 Re Health Physics/ Emergency Planning & EA-86-070 Re Fire Protection ML20203B0881986-07-0202 July 1986 Forwards SALP Rept for Feb 1985 - Jan 1986,for Review.Salp Board Rated Licensee Performance Category 1 in Area of Outages & Category 2 in All Other Areas Except Fire Protection.W/O Encls ML20236Y1311986-04-25025 April 1986 Forwards List of Primary Containment Isolation Valves & Valve P&ID Locations as Referenced in Util 860117 & 0218 Request for Amend to License NPF-21 ML20198D7151986-04-24024 April 1986 Forwards Insp Rept 50-397/86-05,notice of Violation & Enforcement History,For Consideration & Action.Civil Penalty Unwarranted Since Fire Watches Immediately Posted & Safety Significance of Fire Loadings Limited ML17278A7091986-04-16016 April 1986 Advises That Deletion of Technical Memo 1227 Overlooked During Issuance of Amend 31 to Fsar.Memo Deleted as Result of Incorporation of Scn 83-135 Into Amend ML20195G7731986-03-14014 March 1986 Forwards Draft SALP Rept for Feb 1985 - Jan 1986,for Review & Comment at 860319 Meeting at Region V.Updated Tables 1 & 4 Also Encl.W/O Encl ML20154K1511986-03-0303 March 1986 Notifies That SALP Board 860312 Meeting Rescheduled for 860319 at Region V.Deviation from Instruction 0701 to Permit a Toth Attendance at B&W Training Course on 860303-15 in Best Interest of SALP Process ML20199D1311986-02-19019 February 1986 Informs That Proposed Recirculation Pump Vibration Testing Plan Acceptable,Based on Licensee Testing Procedure & Supporting Stress Analysis ML20203B1101986-02-13013 February 1986 Forwards Assessment of Lers,Including Results for Input Into SALP Rept for Feb 1985 - Jan 1986.LERs of Above Average Quality ML20195G7801986-02-0909 February 1986 Forwards Data Tables for Use in Preparing Performance Analysis for Salp.Insp Results & LERs Occurring During Last Month of SALP May Not Be Included in Tables.Tables Subject to Review & Comment Until SALP Process Completed.W/O Encl ML20215N3041986-01-30030 January 1986 Provides Summary of Review of Past Experience as Related to Handling of Nonradiological Issues.State of Wa Notified by NRC of Industrial Safety Concerns at Facility.Dm Kunihiro 851213 Memo to State of Wa Encl ML20151Q9751986-01-29029 January 1986 Requests Identification of Div Contact for Regional Insp Team Leaders to Arrange NRR Alternative Shutdown & Fire Protection Reviewer Technical Assistance on region-based post-fire Safe Shutdown Insps.Schedule of Insps Submitted ML20149M8611986-01-24024 January 1986 Discusses 851202-06 Observation of Seven INPO Members & Two Industry Peer Evaluators During Conduct of Site Visit to Evaluate Three Training Programs at Plant.Significant Milestones Toward Accreditation of Training Programs Listed ML20198H2291986-01-22022 January 1986 Requests Date & Subj of Application for OL Issued on 840413.Info Needed to Complete Review of 850318 Transmittal of License Fee Data & Assessment of Fees & Contractual Costs Through 841222 ML20198G8771986-01-16016 January 1986 Forwards Brief Description & Evaluation of Util 850911 Proposed Tech Spec Change to Revise Composition of Corporate Nuclear Safety Review Board.Proposed Change Acceptable ML20198G8291986-01-0606 January 1986 Forwards Draft Response to 850718 Memo Re Inspector Feedback /Request for Technical Assistance on NUREG-0737,Item II.F.1.Response Based on Review of Util Position on Iodine plate-out ML20141E9281985-12-26026 December 1985 Recommends Survey of Plants Re Licensee Review of Preservice Insp Rept & Submittal of Relief Requests.Relief Requests from Preservice Insp Should Be Submitted Before Issuance of OL & Plant Startup to Permit NRC Review 1999-04-14
[Table view] Category:MEMORANDUMS-CORRESPONDENCE
MONTHYEARML20205N9871999-04-14014 April 1999 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered on 990308-11 ML20203G0081999-02-12012 February 1999 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered on 981102-06 ML20211M5671997-10-0303 October 1997 Forwards Regulatory Documents Comprising Regulatory History of Notice of Proposed Rulemaking Entitled Financial Assurance Requirements for Decommissioning Nuclear Power Reactors, Which Amended 10CFR50,published in Fr on 970910 ML20149D7851997-07-14014 July 1997 Notification of Significant Licensee Meeting W/Util on 970731 in Arlington,Tx to Discuss Case Studies (Response Time & Reactor Feedwater Pump Trip Test) & Common Themes ML20137C9201997-03-20020 March 1997 Forwards Documentation of Meeting Conducted in Region 4 Office on 970225 to Discuss NRC Enforcement Policy as Applied to Nonescalated Enforcement ML20134P5931997-02-21021 February 1997 Forwards Order Imposing Civil Monetary Penalty for Transmittal to Ofc of Fr for Publication.W/O Encl ML20132F5421996-12-19019 December 1996 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered on 961007-11 ML20134E9191996-10-29029 October 1996 Forwards Rationale for Inital Plants Selected for Design Insps & for Plants Considered for Second Quarter FY97 Design Insps ML20203B9891995-11-20020 November 1995 Discusses OI Rept 4-95-032 Re Alleged False Statements by Fire Watches to NRC Inspectors.Oe Will Consider Matter Closed from Enforcement Perspective Unless Different View Received within 3 Wks of Date of This Memo ML20211M6231994-11-30030 November 1994 Provides Info to Commission on Status of Rulemaking Activities Re Power Reactor Decommissioning Cost Issues,Per 930714 SRM ML20236L5631994-08-10010 August 1994 Responds to Former Region V 930422 Request for NRR Evaluation of WPPSS Practices Associated W/Testing RHR Sys While Aligned in SPC Mode ML20056E5141993-08-12012 August 1993 Submits SALP Schedule for FY94 Per Mgt Directive 8.6 ML20056E4571993-08-0505 August 1993 Forwards Technical Review Rept Re, Tardy Licensee Actions Initiated Because of Delayed Replacement of Batteries in Uninterruptible Power Supplies at Plant ML20247G1561989-05-15015 May 1989 Forwards Director'S Decision 89-03 in Response to 2.206 Petition Re BWR Stability.Petition Filed by Hiatt on Behalf of Ocre Expressing Concerns Re 890309 Power Oscillattion Event & Requested Action W/Respect to All BWRs ML20245B6421989-04-15015 April 1989 Forwards Engineering Evaluation Rept on BWR Overfill Events Resulting in Steam Line Flooding.Though Little Actual Damage Experienced,Potential for Equipment Damage Believed to Exist & Any Damage Occurring Should Be Fixed Prior to Restart ML20245B6531989-04-15015 April 1989 Forwards Evaluation Rept on BWR Overfill Events Resulting in Flooding of Steam Lines.Events Determined to Involve Deficiencies in Control Sys ML20245B6191989-04-15015 April 1989 Forwards Evaluation Rept Re BWR Overfill Events Resulting in Steam Line Flooding.All Events Included Reactor Depressurization Followed by Uncontrolled Condensate or Condensate Booster Pumps Injection or Both ML20245B7501989-04-15015 April 1989 Forwards Engineering Evaluation Rept on BWR Overfill Events Resulting in Flooding of Steam Lines.Potential for Equipment Damage Believed to Exist & Any Damage Occurring Should Be Fixed Prior to Restart ML20147E3621988-02-28028 February 1988 Summary of 880223 Operating Reactors Events Meeting 88-008. List of Attendees,Tabulation of long-term Followup Assignments to Be Completed & Summary of Reactor Scrams Encl ML20195G7981987-07-31031 July 1987 Partially Deleted Memo Forwarding SALP Rept & Recommendations Re NRC Actions for Plant.W/O Encl IR 05000397/19870061987-07-0101 July 1987 Forwards Draft SALP Rept 50-397/87-06 for Feb-May 1987 for Review.Comments Requested at SALP Board Meeting Schedule for 870707 in Region V.Update of Tables 1-4 Included in Draft. W/O Rept ML20236B1451987-06-18018 June 1987 Forwards Response to DF Kirsch 870507 Memo Requesting Performance Analysis Info for Input to Facility SALP Rept. Review Results Provided in Encl.Encl Withheld ML20214M1381987-05-26026 May 1987 Provides Enforcement Guidance to Regions for Issues Re Control Room Habitability/Control Room Emergency Ventilation Sys Deficiencies.Summary of Plants Reviewed & Documents Describing Findings Encl ML20195G7931987-05-12012 May 1987 Forwards Insp & LER Data Tables for Use in Preparing Performance Analyses for Salp,Per DF Kirsch 870507 Memo. Tables Subj to Review & Comment Until SALP Process Complete. W/O Encls ML20214A0311987-05-12012 May 1987 Notifies of 870514 Briefing on Licensing & Operational Status of Plants Assigned to Project Directorate V,Including Diablo Canyon,Palo Verde,Rancho Seco,San Onfore,Trojan & WPPSS 2 ML20212M8601987-03-0909 March 1987 Forwards SER Re Concerns Identified in Plant Fire Protection Program,As Described in FSAR Through Amend 33.Concerns Resolved Except for Listed Items,Including Adequacy of Safe Shutdown Procedures.Review Excluded Amend 37 Items ML20154A2831986-12-13013 December 1986 Forwards Assessments by Enforcement Staff of Regional Performance in Enforcement Area from Jul-Nov 1985 ML20215G1361986-10-14014 October 1986 Summary of 861006 Operating Reactor Events Meeting 86-35 Re Events Since Last Meeting on 860929.Assignees Should Review Identified Responsibilities & Completion Dates & Advise If Dates Cannot Be Met.Attendance List & Viewgraphs Encl ML20215F2751986-10-0606 October 1986 Forwards Action Timetable Re Coordinated Approach to Resolution of Fire Protection Issues at Facility ML20209A8611986-09-0202 September 1986 Forwards Matls Needed to Complete Assignment During Emergency Preparedness Exercise on 860916-19.W/o Encl IR 05000397/19860121986-08-25025 August 1986 Notification of 860828 Meeting W/Util in Walnut Creek,Ca to Discuss Apparent Violations Involving Equipment Qualification (50-397/86-12),Region V Team Insp 50-397/86-11 & Control of Combustible Matls ML20204G4051986-08-0404 August 1986 Notification of 860909 Meeting W/Utils in Bethesda,Md to Discuss Nrc/Util Living Schedules,Util Performance,Legal Considerations,Tech Spec Improvements & Severe Accident Policy/Degraded Core Programs.Proposed Agenda Encl ML20207J2451986-07-16016 July 1986 Forwards Request for Addl Info Re Util Application to Amend Tech Spec 4.6.4.1 Concerning Drywell Vacuum Breakers,For Transmittal to Licensee.Receipt of Info After 860731 Will Require Rev to 860831 Anticipated Review Completion Date ML20058K6041986-07-0303 July 1986 Informs of Telcon on Status of EA-86-110 Re Health Physics/ Emergency Planning & EA-86-070 Re Fire Protection ML20203B0881986-07-0202 July 1986 Forwards SALP Rept for Feb 1985 - Jan 1986,for Review.Salp Board Rated Licensee Performance Category 1 in Area of Outages & Category 2 in All Other Areas Except Fire Protection.W/O Encls ML20236Y1311986-04-25025 April 1986 Forwards List of Primary Containment Isolation Valves & Valve P&ID Locations as Referenced in Util 860117 & 0218 Request for Amend to License NPF-21 ML20198D7151986-04-24024 April 1986 Forwards Insp Rept 50-397/86-05,notice of Violation & Enforcement History,For Consideration & Action.Civil Penalty Unwarranted Since Fire Watches Immediately Posted & Safety Significance of Fire Loadings Limited ML17278A7091986-04-16016 April 1986 Advises That Deletion of Technical Memo 1227 Overlooked During Issuance of Amend 31 to Fsar.Memo Deleted as Result of Incorporation of Scn 83-135 Into Amend ML20195G7731986-03-14014 March 1986 Forwards Draft SALP Rept for Feb 1985 - Jan 1986,for Review & Comment at 860319 Meeting at Region V.Updated Tables 1 & 4 Also Encl.W/O Encl ML20154K1511986-03-0303 March 1986 Notifies That SALP Board 860312 Meeting Rescheduled for 860319 at Region V.Deviation from Instruction 0701 to Permit a Toth Attendance at B&W Training Course on 860303-15 in Best Interest of SALP Process ML20199D1311986-02-19019 February 1986 Informs That Proposed Recirculation Pump Vibration Testing Plan Acceptable,Based on Licensee Testing Procedure & Supporting Stress Analysis ML20203B1101986-02-13013 February 1986 Forwards Assessment of Lers,Including Results for Input Into SALP Rept for Feb 1985 - Jan 1986.LERs of Above Average Quality ML20195G7801986-02-0909 February 1986 Forwards Data Tables for Use in Preparing Performance Analysis for Salp.Insp Results & LERs Occurring During Last Month of SALP May Not Be Included in Tables.Tables Subject to Review & Comment Until SALP Process Completed.W/O Encl ML20215N3041986-01-30030 January 1986 Provides Summary of Review of Past Experience as Related to Handling of Nonradiological Issues.State of Wa Notified by NRC of Industrial Safety Concerns at Facility.Dm Kunihiro 851213 Memo to State of Wa Encl ML20151Q9751986-01-29029 January 1986 Requests Identification of Div Contact for Regional Insp Team Leaders to Arrange NRR Alternative Shutdown & Fire Protection Reviewer Technical Assistance on region-based post-fire Safe Shutdown Insps.Schedule of Insps Submitted ML20149M8611986-01-24024 January 1986 Discusses 851202-06 Observation of Seven INPO Members & Two Industry Peer Evaluators During Conduct of Site Visit to Evaluate Three Training Programs at Plant.Significant Milestones Toward Accreditation of Training Programs Listed ML20198H2291986-01-22022 January 1986 Requests Date & Subj of Application for OL Issued on 840413.Info Needed to Complete Review of 850318 Transmittal of License Fee Data & Assessment of Fees & Contractual Costs Through 841222 ML20198G8771986-01-16016 January 1986 Forwards Brief Description & Evaluation of Util 850911 Proposed Tech Spec Change to Revise Composition of Corporate Nuclear Safety Review Board.Proposed Change Acceptable ML20198G8291986-01-0606 January 1986 Forwards Draft Response to 850718 Memo Re Inspector Feedback /Request for Technical Assistance on NUREG-0737,Item II.F.1.Response Based on Review of Util Position on Iodine plate-out ML20141E9281985-12-26026 December 1985 Recommends Survey of Plants Re Licensee Review of Preservice Insp Rept & Submittal of Relief Requests.Relief Requests from Preservice Insp Should Be Submitted Before Issuance of OL & Plant Startup to Permit NRC Review 1999-04-14
[Table view] |
Text
'
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' Central F t eading File NOV i 7 1963 Docket No. 50-397 MEMORANDUM FOR: Thomas M. Novak, Assistant Director for Licensing Division of Licensing FROM: James P. Knight, Assistant Director Components & Structures Engineering Division of Engineering
SUBJECT:
WASHINGTON NUCLEAR PROJECT 2 INPUT FOR SUPPLEMENTAL SAFETY EVALUATION REPORT FOR PURGE AND VENT VALVES (DOCKET NO. 50-397)
Plant Name: Washington Nuclear Project 2 Docket No.: 50-397 Licensing Stage: OL Responsible Branch: Licensing Branch No. 2 Responsible Completion Date: R. Auluck
. Requested Completion Date: January 15, 1983 Review Status: Continuing The enclosed draf t Supplemental Safety Evaluation Report (SSER) was prepared by DE:C&SE, Equipment Qualification Branch. The final SSER on this subject will be forwarded shortly. In addition the SSER with regard to SRP 3.10 will follow shortly. We have asked DSI (memo-randum dated November 17, 1983) to assist in evaluating the justifications for interim operations involving safety related equipment not yet qualified.
With the technical assistance of Brookhaven National Laboratory we have completed our review of information submitted concerning operability of containment purge and vent valves for WNP-2. We find the information submitted failed to demonstrate the ability of these valves to close against the buildup of containment piessure in the event of a DBA/LOCA.
For this reason the purge and vent valves should be sealed closed in
Contact:
R. Wright, NRR Ext. 28209
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' Thomas M. Novak .
accordance with SRP Section 6.2.4.11.6.f. Thus, the following licensing condition or Technical Specification is required:
"The purge and vent valves shall be sealed closed during operating modes 1, 2, 3 and 4 until their operability can be demonstrated" 1
James P. Knight, Assistant Director Components & Structures Engineering Division of Engineering
Enclosure:
As stated cc: A. Schwencer J. Jackson R. Auluck R. Wright V. Noonan J. Singh, INEL w ns \
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WASHINGTON NUCLE AR PROJECT-2 (k
00CKET 50, 50-397 '
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DENONSTRATION OF CONTAlhMENT PURGE AND VENT VALVE OPERA 3ILITY -
t v ,. n,'.
i 1.0 Requi _recent_ ,' .
g,a:au',
Demnstration of operability of the contair:1ent ourge and vent valves, par-ticularly the ability of these valves to close during a design basis accident, is necessary to assure contaiment isolation. This demnstration of operabil-ity is required by BTP CSB 6 4 and SRP 3.10 for containrent purge and vent valves $1ch are not scaled closed during coeratiW conditions 1. 2, 3, and
- 4. 'y 2.0 Description of Purae and Vent Valves The valves identified as the containrent isolation valves in the ourge and vant systen are as follows:
g,q', $.}' ,
Valve Size ' ',. .
Use Location (inches)
Valve Nunber 30 Vent. Supply Outside Contaf ment :
CSP-Y-1 Outside Containrrnt CSP-V-2 30 Vent. Supply 24 Vent. Supply Outside Contalment CSP-V-3 Vent. Supply Outside Contain ent CSP-V 4 24 30 Vent. Exhaust Outside Contaiment CEP-V-1A Outside Contain:nent CEP-V-2A 30 Vent. Exhaust
- 24 Vent. Exnaust Outside Contafment CEP-V-3A Outside Containrent CEP V 4A 24 Vent. Exhaust The contaf rment purge and wnt valves are tutterfly valves nanufactured by SIF, a unf t of General Signal Corporation and are listed as BIF Model Nurtcr A-206765 ( 24" valves) and SIF Model Number A-206763 (30' valves). Miller Air Products Corporation Model A-83 cylinders (air open - sprf ng closed) are used for valve actuation. The 24-inch valves use 8" cylinders and the 30' valves use 10* cylinders.
G r. "' Y 3.0 Demnstration of Operability. p.!!l.' '
3.1 Washington Public Power Supply System (WPP55) has provided operability denonstration information for the contalment purge and vent syste, f solation i
valves used at their Washington Nuclear Project 2 (WNP 2) in the following submt ttal s :
Reference A_
WPPSS letter, February 24, 1983 G. O. Bouchey to A. Schwencer (NRC).
1 f: * ,',. '. I ' 'f
- r. .o p s s. 's. -
i
,, z -..s.-
R:ference B_ i
? ,,
e 9'. t..
(
WPPSS letter, June 22, 1983 G. D. Bouchey to A. Schwencer (NRC).
3,2 Determination of dynamic torques during valve closure against the buildup ,
of containment pressure during a LOCA is based on cynamic torque coefficients C T obtained fron SIF tests performed using dif ferent types of disc geometry
- and disc and shaft orientation with respect to direction of flow. The test medium is water and no air testing was performed. One of the test configura-i tions included a directly connected short radius elbow upstream to study the ef fect of flow non-uniformity on dynamic torque. Several tests were also per-formed with the valve shaft vertical and horizontal, counter clockwise opening .
and clockwise opening, with flatside upstream and flatside downstream. Fron these tests, the most severe case was cetermined to be a vertical shaft orien- ,
tation (i.e. perpendicular to the plane of the elbow) with the flatside of the disc downstream and with a clockwise rotation of the disc. This orientation results in an approxir.ately 30% increase in maximum dynamic torque coefficient 3 over the straight pipe inlet configuration. Torque coefficients used to de- t termine dynamic loads for WNP-2 purge and vent valves are based on this worst ,
case configuration.
The differential pressure !. p across the valve is calculated fron the data on volusetric flow rate under LOCA conditions, and using the equation, i
Pg2-P 22 Q = 963 Cy q.7 GT1 [; s' ; t' where Q = Gas flow in SCFH Pt - Valve upstream pressure (psia)
P2 = Valve dowistream pressure (psia)
G = Specific gravity ,
T1 = Upstream tertperature in CRankinc '
2 Cy = Valve coefficient = 29.9 0 Ev 0 = Valve Port diameter (In.) ;
Ky = Coefficient of flow .
No load closure time for the valves ranged from 1 1/2 to 4 seconds based on tests perforined at B!F. The maximum no load closure tire of a seconds is used for the analysis with a one second instra.nentation time delay for a total of 5
.ru . 6 I k y .' ,' i \
D S .. U c As an a::ditional conservatism, seconds from LOCA initiation-to-valve closure.
the drywell pressure and temperature rise during a LOCA is used for all valves.
Dynamic torques are calculated for both saturated steam and air as the flow -
media. The calculations are summarized and shown below in Tables 1, 2, 3, and 4 (Reference B) for both the 24-inch and 30-inch valves and for steam and air fl ow.
The peak dynamic torques during closure and the seating and bearingc analy-es used_fn_the__setsof friction torques at 00 are conpared to the design toe '
sis report and indicate positive margins 6 _
SUMMARY
OF RESULTS Table 1. 30-Inch Valve, Airflow, (TNET = 22174 in-lb)
Dyna:nic Time Angle 2 Torque ,
(s) deg. in-1b. ,
' *I '
1.0 90 (Full Ocen) 11020 .
3~*'
1.5 78.75 23098 2.0 67.50 18138 2.5 56.25 14747 3.0 45.00 12428 3.5 33.75 10780 l 4.0 22.50 8014 4.5 11.25 3972 5.0 9.0 (Full closed) 0.0* ,
- At full closed position, the dynamic torque is zero and the not torque is due to stating and bearing friction.
W '
Note: The design torque used in the Seismic analysis report No. ,
l TR-74 8 _NcPherson_!ssociates_for_this valve is 27800 i in-1b.b .
l E.!')I t..'SEY T 9
/ ,
- m.._.--_. .-- - _ _ . . _ _ _ . . _ . - - . _ _ _ _ _ - _ _ _ - _ _ _ _ . _ . . _ . _ - _ _ , _ - _ _ . - . _ _ - _ _ _ _ . . - - - - . __ . . - - - _
4- f*, r; y z.,..,
,%l ,' .
SUMMARY
OF RESULTS Table 2. 30-inch Valve , Steam flow , (TNET = 22174 in-lb)
Dynamic Time Angle 2 Torque deg, in-lb.
(s) 1.0 90 (Full Open) 11032 78.75 23175 1.5 2.0 67.50 18142 es 56.25 14668 ,4 f f.1/? P'3 '
2.5 *'e '
3.0 45.00 12424 33.75 10580 3.5 22.50 7809 4.0 11.25 3867 4.5 5.0 9.0 (Full closed) 0.0* ,
- At full closed position, the dynanic torque is zero and the .
net torque is due to seating and bearing friction.
SUMMARY
OF RESULTS
- Table 3. 24-Inch Valve, Airflow, (ThET = 13808 in-lb)
Dynamic Angle a Torque Time (s) deg. in-lb.
1.0 90 (Full Open) 5525 78.75 11692 ,
1.5 .
2.0 67.50 9095 [yf ,f; ,.,,,
2.5 56.25 7428 ;;.,,:)c : r. ,9 6239 "a 3.0 45.00 33.75 5430 3.5 :
4.0 22.50 4043 11.25 2020 4.5 5.0 9.0 (Full closed) 0.0*
- At full closed position, the dynamic torque is Zero and the ,
net torque is due to seating and, bearing friction. .
L' .
Note: The design torque used in the jeismic analysis report N1. ;
TR-74-8 by McPhersca- Associates _for_ this valve is 17000 f
(m' g
'"b- II SUPNARY OF RESULTS Table 4. 24-Inch Valve, Steamflow, (TNET = 13808 in-lb)
Dynamic
- Time Angleo Torque (s) deg. in-lb. .
1.0 90 (Full Open) 5425 1.5 78.75 11394 fi s 2.0 67.50 8921 ! / ?.3 N 2.5 56.25 7213 "J A."i '.I' [
3.0 45.00 6109 3.5 33.75 5202 4.0 22.50 3842 -
4.5 11.25 1902 5.0 9.0 (Full closed) 0.0 *
- At full closed position, the dynamic torque is zero and the .
net torque is due to seating and bearing friction.
3.3 Demonstration of actuator torque nargin is based on the mininum spring force developed which is equal to the spring pre-load.
24-inch valve _( _8_* cylinder) 16,890 in-lbs (preload) > 13,808 in-lbs (seating torcue). .0 f *p 30-inch Valve (10-inch cylinder) 32,422 in-1bs (preload) > 22,174 in-lbs (seating toroue). /g p 3.4 WPPSS provides a structural analysis for the rge and vent valves and their operators in Reference B. This consists of (3p$eismic/ Hydrodynamic Requalification Reports for the 30-inch valves, 24 neh valves, and the operators. The requalification certificates for both the 24' and 30' valves are contingent upon ear bolt modifications and the addition of shear plates.
Acceptance criteria for the structural analysis are taken fron' Section !!! of the A$ME Boiler and Pressure Vessel Code or the A!SC Constructin Manual, whichever is applicable. Loads used in the analysis are the valve operating loads ccanbined with the dynamic loads which wculd result from seismic and hydrodynamic events as determined by the piping analysis for the plant.
>A v u:h(l'
pnr. MP.- '
r g) f.j O An $RSS analysis was set up in a cortputer program for each valve assembly in its specific orientation. The SRSS is taken at the maximum stress level due to seismic g-loading. Operating loads due to seating terque force and dead .
weight are combined with the seismic stress by absolute sum.
Based on the results of the structural analysis, the valves will remain functional through forty years of postulated hydrodynamic events, five operating basis earthquakes, and one safe shutdown earthquake. ,
4.0 Evaluation gy r p,.,g. ,.,yfi ~ !
4.1 The determination of dynamic toFques for WPPSS purge and vent valves under LOCA conditions is based on the testing by the valvo suppif er (BIF) of a codel valve using water as the test reditn. Tests conducted with a short el- .
bow directly upstream, valve shaft at'90 0 to the plane of the elbow, and , ,
flatside of disc downstream indicated a 30% increase in maximum, dynamic tor-que coef ficient for this worst case g try. Using data from model tests performed by other valve manufacture 'sf th air as the test medium, this produces a 300% increase in maxtr.um dynamic torque coeff t-worst cient. caseThe geonetry4'ifference large d (30% water versus 300% air) in maximum dynamic .
torque coefficient is due to the higher (above Mach .3) velocities at large angles of opening where the dynamic toroue coefficients peak. Dynamic torque coefficients from model tests using incompressible fluids correlate reasonably .
well with data from tests using air if the velocities are belew a Mach number .
of0.3).
Considering the analysis results tabulated in Table 1 of Reference A, the peak
- dynamic torque for the 20-inch valve occurred at 78.750 and was 23,098 in-1bs. The design torque is 27,800 in-Ibs as noted in the same table.
Applying a 300% increase to the 23098 in 1bs peak dynamic torque which already has a 30% worst case configuration factor; the peak dyna-:ic torque using the factor from air tests works out to 48,505 in lbs, well above the 27,800 in-lbs .
design torque. ,,
tailed valve installation inforr.ation was not provided for each valve ,
i M
%' rn. e n n sj
- 1. Direction of flow. 2* 9( -
/
- 2. Disc closure direction.
t 3. Curved side of disc, upstrean or downstream (asy-rtetric discs).
4 Orientation and distance of c1 bows, tees, bends, etc. within 20 cipe diameters of valve. :
t 5. Shaft orientation.
p 6. Distance between valves.
/An acceptable approach to the staf $ instead of the conservative worst cc
- /
torque coefficients for each valveYinstallation configuration coupled with V a ')
( restriction on valve opening. /
-~.
6
~l @ M
/Nigp;. .'
%j;f ,8
- 4. 2 -
i u cr.s e worst case georaetry at large angles of valve openings can produce in . is
',/g{'
very hi 'tbf@iis that would be considerably larger than the seating torque, } g f, ,
ns . ! i <, im .rr..r. n . ...s .s( w ......n b ) rakad e- $hr C h h ny rvry ~
y, s 4.3 Valve pressure ratings and a static pressure analysis are not, addressed -
in the subeittals. p al4 ue.<i4.-A pc.u.4cM.v. 0[,,.. es
.} . , u u .,; t t s .- t . ., t 4.4 Reference A includes plots of flow rate versus time from LOCA initiation' V for the 24-inch and 30-inch valves : aintained in a full open sition. The -
abscissa incorrectly includes valve closure / from 900 to 0%
4 #-m W M 'N { "/*
/&ws . n , -f ja C.cet a/y J w m r. f e../ eLc ..p '
- 5.0 Sumary 4 ~ ' -
'a;yW d '
We have coripleted our review of the infomation submtted to'date, concerning the operability of the 24-inch and 30-inch valves used in the containment j purge and vent system for Washington Nuclear Project-2. We find that the .
information submitted for the 24-inch and 30-inch valves did not demonstrate that these valves have the ability to close against the buildup of pressure in the event of a DBA/LOCA fecrn the full open position. Paragraphs 4.1 and 4.2 are the bases for these findings. For this reason, the 24-inch and 30-inch valves should be sealed closed in accordance with SRP Section 6.2.4 and i III.6.f. Furthermore, these valves should be verified to be closed at least once every 31 days, i
i:i P
.w-- . - - p.- m,..- - - - - - _ _
p n n)o UNITED STATES I
h)/LL U Q&~
g,+ ',",v.. ( 3gg NUCLEAR REGULATORY COMMISSION D*s . E CASHINGToN, D. C. 20555
% .3) m ,7 ;sa MEMORANDUM FOR: Robert W. Houston, Assistant Director for Reactor Safety Division of Systems Integration Daniel Muller, Assistant Director for Radiation Protection Division of Systems Integration Lester Rubenstein, Assistant Director for Core and Plant Systems Division of Systems Integration FROM: James P. Knight, Assistant Director Components & Structures Engineering Division of Engineering
SUBJECT:
JUSTIFICATIONS FOR INTERIM OPERATION, WASHINGTON NUCLEAR PROJECT 2 (DOCKET NO. 50-397)
The Equipment Qualification Branch, Division of Engineering has recently received from WPPSS justification for interim operation with safety-related electrical and mechanical equipment which will not be fully qualified for seismic and dynamic loadings. Because these justifications are interdisciplinary and often require a detailed knowledge of the
- systems in which equipment functions, your assistance is requested for this review.
The DSI and DE cognizant review branches should be responsible for the following:
- 1. Review of equipment functions within a system and failure consequences.
- 2. Review of alternate equipment to accomplish the safety function.
Attachment I contains the individual justifications. In the upper right hand margin of each page, the branch believed to be responsible for the review has been listed. If another branch is responsible, please notify R. Wright (X28209). Justifications have not been provided for all outstanding equipment since WPPSS anticipates obtaining full qualification documentation for those items prior to fuel load.
Contact:
R. Wright, NRR Ext. 28209 l
c J
Your prompt attention is requested. Written responses should be forwarded to us no later than November 22, 1983, in order that there be no impact on the licensing schedule. -
/g W '
J t 1stant Director
/t ponents Struct res Engineering ivision Engineering Attachments: As stated cc: w/o attachments w/ attachments V. Noonan R. Wright O. Parr T. Collins W. Gammill J. Ridgely F. Congel S. Rhow V. Benaroya R. Giardina A. Schwencer J. Singh, INEL E. Weinkam G. Bagchi R. Auluck l
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