Letter Sequence RAI |
|---|
TAC:42603, (Approved, Closed) TAC:42604, (Approved, Closed) TAC:51948, (Approved, Closed) TAC:51984, (Approved, Closed) TAC:51985, (Approved, Closed) |
Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance...
Results
Other: ML19210D037, ML19248D525, ML19249B824, ML19254F785, ML19254F792, ML19256A718, ML19256A807, ML19256F452, ML19262B985, ML19275A926, ML19310A971, ML19352A969, ML20002A542, ML20008E032, ML20027E669, ML20027E675, ML20055A436, ML20062E590, ML20077Q266, ML20082H504, ML20107J281, ML20134G852, ML20138N067
|
MONTHYEARML18078A4061978-11-11011 November 1978
Forwards Comments in the Form of Redraft of Commission Paper Re Proposed Fed Register Notice Abnormal Occurrence Event, Loss of Containment Integrity W/Encl Draft Notice of Issuance
Project stage: Draft Other
IR 05000321/19780361978-11-29029 November 1978
IE Insp Repts 50-321/78-36 & 50-366/78-45 on 781106-09. Noncompliance Noted in Following Areas:Failure to Conduct Maint on safety-related Equipment & Failure to Submit a 30- Day Rept
Project stage: Request
ML20062E5901978-11-29029 November 1978
Discusses Possible Dangers of LOCA in Containment Purging During Normal Plant Oper.Requests Either Commitment to Limit Purging or Justification for Continuing.W/Encl ANO: 7812080207
Project stage: Other
ML19256A7181979-01-0303 January 1979
Discusses Unlimited Purging Re Possible Failure of Automatic Isolation of Large Diameter Containment Purge Penetrations Used During Power Operations.Concludes That Bypass & Override Conditions Can Be Identified
Project stage: Other
ML19256A8071979-01-0909 January 1979
Responds to NRC .Review Underway Is Expected to Justify Unlimited Purging During Normal Plant Operation. Study to Be Completed by 790416
Project stage: Other
ML19249B8241979-04-30030 April 1979
Summary of Review of Design of All Safety Actuation Signal Circuits Which Incorporate Manual Override Feature
Project stage: Other
ML19248D5251979-08-10010 August 1979
Responds to 790720 Request & Forwards Addl Info Re IE Bulletin 79-08.Standing Order Issued 790515 as Interim Means of Implementing Reporting Requirements of Item 9 of Bulletin
Project stage: Other
ML19249B8211979-08-29029 August 1979
Forwards Addl Response to 781129 Request for Info Re Vent & Purge Design & Operation.Rept Summary of Review of Design of All Safety Actuation Signal Circuits Which Incorporate Manual Override Feature Encl
Project stage: Request
ML19254B3631979-08-29029 August 1979
Forwards Request for Addl Info Re Override of Containment Purge Isolation
Project stage: RAI
ML19250A7591979-10-18018 October 1979
Forwards Response to 790913 Request for Commitment to Comply W/Requirements of NUREG-0578.Optimum Method of Addressing Concern,In Recognition of plant-unique Features, Proposed
Project stage: Request
ML19275A9261979-10-18018 October 1979
Forwards Commitment to Meet Requirements of NUREG-0578. Intends to Meet Requirements & Schedules Set Forth in NRC
Project stage: Other
ML19254F7851979-10-22022 October 1979
Requests Util Commitment to Comply W/Encl Interim Position Re Containment Purge & Vent Valve Operation Pending Resolution of Isolation Valve Operability.Commitment Needed within 45 Days
Project stage: Other
ML19254F7921979-10-30030 October 1979
Requests Util Commitment to Comply W/Encl Interim Position Re Containment Purge & Vent Valve Operation Pending Resolution of Isolation Valve Operability.Commitment Needed within 45 Days
Project stage: Other
ML19260B9881979-11-0606 November 1979
Forwards Request for Addl Info About Containment Purge & Vent Sys Re Util Plans for Unlimited Purging
Project stage: RAI
ML19210D0371979-11-13013 November 1979
Responds to NRC Re Containment Purging & Venting. Vent & Purge Valves at Three Units Qualify W/Nrc Guidelines to Extent Guidelines Apply
Project stage: Other
05000321/LER-1979-081, Responds to 790927 Request for Expedited Implementation of Valve Qualification Program.Potential Problems Noted W/ Containment Purge & Vent Valves,Reported as LER 79-81.Valve Operator to Be Modified & Program Implemented1979-11-15015 November 1979
Responds to 790927 Request for Expedited Implementation of Valve Qualification Program.Potential Problems Noted W/ Containment Purge & Vent Valves,Reported as LER 79-81.Valve Operator to Be Modified & Program Implemented
Project stage: Request
ML19256F4521979-11-19019 November 1979
Forwards Addl Info Required for Completion of NRC Evolution of Electrical Override/Bypass Aspects of Containment Isolation Matter.Criteria Encl
Project stage: Other
ML19211A4411979-11-19019 November 1979
Forwards Request for Addl Info to Complete Evaluation of Electrical Override/Bypass Aspects of Containment Purge Sys
Project stage: RAI
ML19257A2931979-12-10010 December 1979
Forwards Request for Addl Info Re Util 790109 & 0829 Responses to NRC Re Containment Purging. Electrical Review Criteria Encl.Requests Reply within 60 Days
Project stage: RAI
ML19260C2221979-12-11011 December 1979
Forwards Criteria Re Electrical Override/Bypass for Use in Review of Operating Reactors.Maintaining Purge Valves Closed Does Not Resolve NRC Concern W/Purge Valve Circuitry
Project stage: Approval
ML19310A9711979-12-27027 December 1979
Requests Preliminary Evaluation of Licensee Response to NRC 791023 Interim Position for Containment Purge & Vent Valve Operation Pending Resolution of Isolation Valve Operability, Generic Item B-24.Evaluation Form Encl
Project stage: Other
ML19211C9021980-01-0909 January 1980
Submits Info in Response to NRC Requesting Commitment to Meeting Interim Position for Containment Purge & Vent Valve Operation. Interim Position Will Be Met Upon Completion of Bypass Line Wiring Mod
Project stage: Meeting
ML19262B9851980-01-16016 January 1980
Responds to NRC 791211 Request Re Containment Purge Sys & Engineered Safety Equipment Component Design.Sys Design & Procedures Utilized for Operation Provide Acceptable Degree of Safety
Project stage: Other
ML20055A4361980-02-28028 February 1980
Electrical,Instrumentation & Control Sys Support, Interim Rept
Project stage: Other
ML20008E0321980-10-0606 October 1980
Amend 61 to License DPR-65 Authorizing Cycle 4 Operation at 2,700 Mwt W/Mixed Core w/one-third Westinghouse Fuel & two- Thirds CE Fuel & Modified Guide Tubes for Control Element Assemblies
Project stage: Other
ML20002A5421980-11-0404 November 1980
Confirms Util Commitments to Interim Position on Containment Purging & Venting,Pending Resolution of Isolation Valve Operability.Commitment Will Remain in Effect Pending NRC long-term Review
Project stage: Other
ML19352A9691981-05-21021 May 1981
Provides Summary of Valve Qualification Efforts Resulting from NRC 790927 Effort.Valve Vendor Analysis Verified That Valve Actuator Has Sufficient Torque Capability to Overcome Forces That Resist Closure Subsequent to Design Basis LOCA
Project stage: Other
ML20027E6751982-10-0101 October 1982
Submits Info Re Status of Containment Purge & Vent Sys,In Response to NRC .Design Acceptable Since Weather at Plant Site Cannot Be Termed Severe
Project stage: Other
ML20027E6691982-11-0909 November 1982
Forwards Re Status of Containment Purge & Vent Sys.Original Submittal Apparently Never Received by NRC
Project stage: Other
ML20070E4031982-12-13013 December 1982
Advises That Specific Containment & Purge Valves Identified in NRC Are Not Applicable to Facilities.Meeting Requested to Determine Status of Remaining Issue Re Purging & Venting
Project stage: Meeting
ML20028C6081983-01-0606 January 1983
Notification of 830119 Meeting W/Util & Bechtel in Bethesda, MD to Discuss Status of Remaining Issues Re Review of Purging & Venting During Normal Operations
Project stage: Meeting
A03035, Forwards Response to NRC Request for Addl Info Re Operability of 6-inch Butterfly Containment Purge & Vent Valves.Based on Analyses,Adequate Justification Does Not Exist to Warrant Mods to Equipment1983-03-28028 March 1983
Forwards Response to NRC Request for Addl Info Re Operability of 6-inch Butterfly Containment Purge & Vent Valves.Based on Analyses,Adequate Justification Does Not Exist to Warrant Mods to Equipment
Project stage: Request
ML20071P0991983-05-31031 May 1983
Application for Amend to Licenses DPR-57 & NPF-5,revising Dose Equivalent Iodine Tech Specs to Reflect Current Requirements.Info Resolving Outstanding Purge & Vent Valve Operability Issues Encl
Project stage: Request
ML20071P1221983-05-31031 May 1983
Proposed Changes to Dose Equivalent Iodine Tech Specs & Preliminary Proposed Tech Specs for Drywell & Suppression Chamber Purge Sys
Project stage: Request
ML20024A6511983-06-15015 June 1983
Proposed Changes to Tech Specs 3/4.6-2,B 3/4 6-6 & Added 3/4.6-46 for Unit 2 & 3.7-10a,3.7-34,3.7-34a & Adding 3.7-10b & 3.7-34b for Unit 1 Re Purge & Vent Valve Operability
Project stage: Request
ML20024A6451983-06-15015 June 1983
Application for Amend to Licenses DPR-57 & NPF-5 Changing Tech Specs 3/4.6-2,B 3/4 6-6 & Adding 3/4.6-46 for Unit 2 & 3.7-10a,3.7-34,3.7-34a & Adding 3.7-10b & 3.7-34b for Unit 1 Re Purge & Vent Valve Operability
Project stage: Request
ML20077Q2661983-09-0101 September 1983
Provides Addl 10CFR50.92 Justification for 830531 & 0615 Applications for Amends to Tech Specs Re Change in Dose Equivalent Iodine & Change in Purge Valve Operability Specs
Project stage: Other
ML20082H5041983-11-22022 November 1983
Proposed Tech Spec Changes Re Dose Equivalent Iodine in Reactor Coolant Sys
Project stage: Other
ML20082H4861983-11-22022 November 1983
Application for Amend to Licenses DPR-57 & NPF-5,changing Tech Specs Re Dose Equivalent Iodine in Reactor Coolant Sys. Original Amend Submitted on 830531.Class III License Amend Fee Encl
Project stage: Request
ML20107J2811985-02-0404 February 1985
Amends 106 & 44 to Licenses DPR-57 & NPF-5,respectively, Revising Tech Specs to Reduce Equilibrium Activity Concentration Limit for Reactor Coolant for Unit 1 & to Reduce Offgas Activity Release Rate for Unit 2
Project stage: Other
ML20134G8381985-08-20020 August 1985
Application for Amends to Licenses DPR-57 & NPF-5,adding Surveillance Requirements for fast-acting Dampers in Standby Gas Treatment Sys Installed During Recent Refueling Outage
Project stage: Request
ML20134G8521985-08-20020 August 1985
Proposed Tech Specs,Adding Surveillance Requirements for fast-acting Dampers in Standby Gas Treatment Sys Installed During Recent Refueling Outage
Project stage: Other
ML20138N0751985-12-11011 December 1985
Safety Evaluation Supporting Amends 118 & 58 to Licenses DPR-57 & NPF-5,respectively
Project stage: Approval
ML20138N0671985-12-11011 December 1985
Amends 118 & 58 to Licenses DPR-57 & NPF-5,respectively, Revising Tech Specs to Eliminate Time Restriction on Opening Purge & Vent Isolation Valves During Operating Modes 1,2 & 3
Project stage: Other
1980-01-16
[Table View] |
Similar Documents at Hatch |
|---|
|
Text
/s /_
/'/)/
,(pa arco, UNITED STATES y ) ",.,, j NUCLEAR REGULATORY COMMISSION E
WASHINGTO N, D. C. 20555
%..'.'./!
NOV 6 1979 MEMORANDUM FOR:
T. Ippolito, Chief Operating Reactors Branch #3 Division of Operating Reactors FROM:
G. Lainas, Chief Plant Systems Branch Division of Operating Reactors
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - CONTAINMENT PURGE SYSTEM - ECWIN I. HATCH NUCLEAR PLANT, UNITS 1 & 2 (TACS 10178,10177)
REFERENCES :
1.
Letter to Director of Nuclear Reactor Regulation frcm C. Whitmer, " Containment Purging Curing Normal Plant Operation," dated January 9,1979 2.
Letter to Director of Nuclear Reactor Regulation from R. Kelly, " Containment Purging During Normal Plant Operation," dated August 29, 1979 Plant Name: Ecwin I. Hatch Nuclear Plant, Units 1 & 2 Docket Nos. : 50-321,50-36o Project Manager:
D. Verrelli Review Status : Awaiting Information With regard to the containment purge and vent system at Edwin I.
Haten Nuclear Plant, Units 1 & 2, the licensee plans to justify unlimited purging (Reference 2). The Plant Systems Branch, Section B, after naving reviewed the documents (References 1 and
- 2) filed by the licensee, has prepared the enclosed request for additional information.
The PSB, Section A (EI&C), is currently reviewing the licensee's infor r.ation provided at their October 14, 1979 meeting.
/
/
Q l(Qw
/ G. Lainas, Chief
/ Plant Systems Branch Division of Operating Reactors Enclosure :
As stated O
16&f 147 7 912180 OD
T. Ippolito NOV 6 1979
Contact:
D. Shum, X27058 cc w/ enclosure:
D. Eisenhut W. Gamill L. Nichols G. Lainas E. Reeves E. Adensam D. Verrelli D. Tondi D. Shum J. Xerrigan G. Knighton V. Noonan F. Witt J. Zudans R. Scnoll
\\\\
16])q7 148
ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION FOR CONTAINMENT PURGE SYSTEM AND CONTAINMENT VENTING SYSTEM FOR HATCH NUCLEAR STATION, UNITS 1 AND 2 DOCKET NOS. 50-321/366 1.
'fith regard to the containment purge and venting system, provide the following infornation:
a.
Discuss the provisions made to. ensure that isolation valve closure will not be prevented by debris which could poten-tially become entrained in the escaping air and steam, b.
Discuss the provisions made for testing the availability of the isolation function and the leakage rate of the isolation valves, individually, during reactor operation.
c.
Specify the amount of containment atmosphere released through the purge and vent isolation valves for a spectrum of break sizes during the maximum closure time allowed in your Technical Specifications.
d.
Provide an analysis to demonstrate the acceptability of the provisions made to protect structures and safety-related equipment, e.g., fans, filters, and ductwork, located beyond the purge system isolation valves against loss of function from the environment created by the escaping air and steam.
e.
For the containment purge isolation valves, specify the differential pressure across the valve for which the maximum leak rate occurs. Provide test results (e.g., from vendor tests of leakage rate versus valve differential pressure) which support your conclusion.
O 16M 149
