Letter Sequence Request |
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MONTHYEARML19250A7991979-10-17017 October 1979
Commits to Implement Requirements of NUREG-0578 for Followup Actions to TMI-2 Accident.Forwards Description of Actions Already Taken,Planned Actions & Expected Implementation Dates
Project stage: Other
ML19211A6831979-12-14014 December 1979
Notifies That Util Will Be in Compliance by 800131 W/Lessons Learned Task Force Recommendations Re Relief & Safety Valves Direct Position Indication & Inadequate Core Cooling Detection Instrumentation
Project stage: Other
ML19270H6701979-12-28028 December 1979
Submits Info Re Auxiliary Feedwater Sys for TMI Lessons Learned Task Force Recommendations 2.1.7a & 2.1.7b.Forwards Electrical,Flow & Logic Diagrams Available in Central Files
Project stage: Other
ML19260C5411979-12-31031 December 1979
Forwards Rept on Implementation of TMI Lessons Learned Task Force Recommendations Re Emergency Power Supply,Relief & Safety Valve Testing & Direct Position Indication of Relief & Safety Valves
Project stage: Other
ML19257A5341979-12-31031 December 1979
Forwards Application for Amend to Licenses DPR-42 & DPR-60, Changing Auxiliary Feedwater Sys Tech Specs
Project stage: Request
ML19305B3431980-03-13013 March 1980
Supplements Re Lessons Learned Task Force Implementation.Includes Info Re Emergency Power Supply, Direct Position Indication of Relief & Safety Valves & Instrumentation for Inadequate Core Cooling
Project stage: Supplement
ML19305D6541980-04-11011 April 1980
Forwards Addl Info Re Implementation of short-term Lessons Learned Task Force Recommendations
Project stage: Other
ML19309F1471980-04-25025 April 1980
Requests NRC Review of Proposed Implementation of short-term Lessons Learned Task Force Recommendations Re Item 2.1.6.b, Plant Shielding Review, Item 2.1.9, Reactor Vessel Head Vent, & Item 2.2.26, Onsite Technical Support Ctr
Project stage: Other
ML19338D1111980-09-12012 September 1980
Notifies of Delay Until 801114 for Submittal of Proposed Tech Specs for Lessons Learned Category a Requirements, Requested by NRC
Project stage: Other
ML19339A4941980-10-29029 October 1980
Responds to NRC Re Interim Criteria for Shift Staffing.Requirements Outlined Have Been Implemented Re Administrative Procedures,Movement of Key Individuals About the Plant & Overtime Work
Project stage: Other
ML19340C5331980-11-13013 November 1980
Describes Status of Environ Qualification Deficiency Re Namco EA-180 Limit Switch Installation Discovered During IE Bulletin 79-01B Investigations.Matl Necessary to Upgrade Switch Installation Has Been Ordered
Project stage: Other
ML19345A9181980-11-20020 November 1980
Requests Relief from TMI Action Plan Implementation Schedule of NUREG-0737,Item II.F.2,re Final Instrumentation for Detection of Inadequate Core Cooling.Affidavit Encl
Project stage: Other
ML19340E0211980-12-15015 December 1980
Notification of 801112 Meeting W/Util Re Draft Emergency Plan.Trip Rept Encl
Project stage: Request
ML19340D3171980-12-18018 December 1980
Responds to NRC 801024 Request for Addl Auxiliary Feedwater Sys Info.Specific Responses,Related Tables & Drawings & Correction to Util Encl
Project stage: Request
ML19340D3311980-12-19019 December 1980
Forwards Application for Amend of Licenses DPR-42 & DPR-60, Changing Tech Specs Re TMI Lessons Learned Category a Procedural & Equipment Requirements.Fee Encl
Project stage: Request
ML19340D3331980-12-19019 December 1980
Application for Amend of Licenses DPR-42 & DPR-60,changing Tech Specs Re TMI Lessons Learned Category a Procedural & Equipment Requirements
Project stage: Request
ML19340D3341980-12-19019 December 1980
Proposed Changes to Tech Specs Sections 3,4 & 6 Re TMI Lessons Learned Category a Procedural & Equipment Requirements
Project stage: Request
ML19347C7311980-12-30030 December 1980
Forwards Commitments to Hardware,Procedural & Organizational Implementation Requirements of NUREG-0737.Implementation Dependent on Equipment Availability & Firm Regulatory Position
Project stage: Other
ML20002D2801981-01-16016 January 1981
Forwards Rept of ECCS outages,1976-80,per NUREG-0737,Item II.K.3.17.ECCS Outage Frequency Does Not Constitute Excessive Unavailability.No Tech Spec Changes Are Warranted
Project stage: Other
ML1132016591981-01-30030 January 1981
Forwards Info Re post-TMI Requirements.Revised Emergency Plan & Meteorological Sys Description Will Be Mailed by Wk of 810201.Shift Technical Advisor,Containment Pressure Setpoint,Eccs Sys Outages & Control Room Info Encl
Project stage: Other
ML19345E8131981-01-30030 January 1981
Forwards Info Re Shift Technical Advisor & Control Room Habitability for NRC Review of Implementation of TMI Action Plan Requirements Per NUREG-0737
Project stage: Other
ML20037D4611981-02-28028 February 1981
Reactor Vessel Head Vent Operation, Revision 0
Project stage: Other
ML20037D4341981-02-28028 February 1981
Background Info for Reactor Vessel Head Vent Operation, Revision 0
Project stage: Other
ML20008F3731981-03-0202 March 1981
Amends 46 & 40 to Licenses DPR-42 & DPR-60,respectively, Incorporating New Requirements for Instruments & Equipment & Shift Manning,Resulting from NRC Assessment of TMI-2 Accident
Project stage: Other
ML20008F3751981-03-0202 March 1981
Notice of Issuance & Availability of Amends 46 & 40 to Licenses DPR-42 & DPR-60,respectively
Project stage: Other
ML19350C1361981-03-27027 March 1981
Informs That Implementation of NUREG-0737,post-TMI Item I.C.5 Requirement,Will Be Delayed Until 810701 Due to Mgt Procedures Being Written in Series Rather than in Parallel. Procedures Build on Requirements Per Higher Level Directive
Project stage: Other
ML19350C6281981-03-31031 March 1981
Advises of Delay in Implementation of NUREG-0737 post-TMI Requirements Due to Unavailability of Variance Computer Hardware.Projected Inservice Date Is Now 810501
Project stage: Other
ML20009E8641981-05-31031 May 1981
Revised Main Control Room Habitability Study
Project stage: Other
ML20004E2481981-06-0808 June 1981
Forwards Addl Info Re post-TMI Requirements for Emergency Operations Facility Per 810408 Commitment.Includes Descriptions of Emergency Response Facility Implementation & Technical Support Ctr
Project stage: Other
ML20037D4311981-07-0606 July 1981
Forwards Background Info for Reactor Vessel Head Vent Operation, Revision 0 & Reactor Vessel Head Vent Operation, Revision 0 in Response to NUREG-0737,Items II.B.1 & II.D.1
Project stage: Other
ML20009A5831981-07-0606 July 1981
Informs That Util Will Provide NRC W/Description of C-E Heated Junction Thermocouple Sys by 810901 Upon Demonstration of Feasibility.Submittal Will Include Info Re NUREG-0737,Item II.F.2
Project stage: Other
ML20009D0151981-07-0808 July 1981
Safety Evaluation Re Applicant Responses to IE Bulletins 79-06A & 79-06A,Revision 1.Actions Taken by Licensee Demonstrate Understanding of Concerns & Implications of TMI-2 Accident
Project stage: Approval
ML20009D0121981-07-0808 July 1981
Discusses Review of 790430,0518 & 0622 Responses to IE Bulletin 79-06A & 79-06A,Revision 1.Encl Safety Evaluation Completes TMI Item II.K.1 & Bulletins.Responses to IE Bulletin 79-06C Will Be Reviewed as Part of Item II.K.3.5
Project stage: Approval
ML20009C9501981-07-10010 July 1981
Order Confirming Licensee Commitments Re post-TMI Related Requirements of NUREG-0737.Requests That Applicant Satisfy Specific Requirements of Nureg,Described in Attachment, within 30 Days
Project stage: Other
ML20009E8541981-07-20020 July 1981
Forwards Revised Main Control Room Habitability Study, Per NUREG-0737,Item III.D.3.4.Revision Corrects Errors in Radiological Analysis Assumptions.Mods Recommended in Toxic Chemical Study Will Be Scheduled for Completion by 830101
Project stage: Other
ML20024B0831983-07-0101 July 1983
Forwards Application to Amend Licenses DPR-42 & DPR-60, Revising Tech Specs Re Containment Sys Recombiners,Control Room Air Treatment Sys & Ref to FSAR Table 7.7-2.Changes Do Not Constitute Significant Hazards Consideration
Project stage: Request
ML20024B0851983-07-0101 July 1983
Application to Amend Licenses DPR-42 & DPR-60,revising Tech Specs Re Containment Sys Recombiners,Control Room Air Treatment Sys & Ref to FSAR Table 7.7-2
Project stage: Request
ML20024B0871983-07-0101 July 1983
Proposed Tech Specs Re Containment Sys Recombiners,Control Room Air Treatment Sys & Ref to FSAR Table 7.7-2
Project stage: Other
ML20077N9221983-08-26026 August 1983
Forwards Application for Amend to Licenses DPR-42 & DPR-60, Changing Tech Specs Re Addition of Instruments to Event Monitoring Instrumentation & Chlorine Detection Sys
Project stage: Request
ML20077N9441983-08-26026 August 1983
Application for Amend to Licenses DPR-42 & DPR-60, Changing Tech Specs Re Addition of Instruments to Event Monitoring Instrumentation & Chlorine Detection Sys
Project stage: Request
ML20077N9561983-08-26026 August 1983
Proposed Tech Specs Re Event Monitoring Instrumentation & Chlorine Detection Sys
Project stage: Other
ML20079G0541984-01-13013 January 1984
Proposed Tech Spec Changes Providing Assurance of Reactor Coolant Vent Sys Operability & Reliability
Project stage: Other
ML20079G0461984-01-13013 January 1984
Application for Amend to License DPR-42 & DPR-60,providing Assurance of Reactor Coolant Vent Sys Operability & Reliability,Implementing Requirements of NUREG-0737,Item II.B.1
Project stage: Request
ML20079G0381984-01-13013 January 1984
Forwards Application for Amend to Licenses DPR-42 & DPR-60, to Provide Assurance of Reactor Coolant Vent Sys Operability & Reliability,Implementing Requirements of NUREG-0737,Item II.B.1
Project stage: Request
ML20088A2551984-03-27027 March 1984
Safety Evaluation Supporting Amends 69 & 63 to Licenses DPR-42 & DPR-60,respectively
Project stage: Approval
ML20088A8931984-04-10010 April 1984
Application to Amend Licenses DPR-42 & DPR-60,revising Tech Specs in Response to Generic Ltr 83-37 to Implement Requirements of NUREG-0737,Items II.B.3,II.F.1.2 & III.D.3.4
Project stage: Request
ML20088A8961984-04-10010 April 1984
Proposed Tech Specs in Response to Generic Ltr 83-37, Implementing Requirements of NUREG-0737,Items II.B.3, II.F.1.2 & III.D.3.4
Project stage: Other
ML20088A8861984-04-10010 April 1984
Forwards Application to Amend Licenses DPR-42 & DPR-60, Revising Tech Specs in Response to Generic Ltr 83-37,to Implement Requirements of NUREG-0737,Items II.B.3,II.F.1.2 & III.D.3.4
Project stage: Request
ML20090D3981984-06-20020 June 1984
Toxic Chemical Study
Project stage: Other
ML20090D3761984-07-0909 July 1984
Suppl 1 to 840410 Application for Amend to Licenses DPR-42 & DPR-60,changing Tech Specs to Delete Requirement for Ammonia,Hydrocloric Acid & Formaldehyde Gas Detection Sys in Main Control Room,Per NUREG-0737,Item III.D.3.4
Project stage: Request
1981-01-30
[Table View] |
Forwards Suppl 1 to 840410 Application for Amend to Licenses DPR-42 & DPR-60,changing Tech Specs to Delete Requirement for Ammonia,Hydrocloric Acid & Formaldehyde Gas Detection Sys in Main Control Room,Per NUREG-0737,Item III.D.3.4| ML20090D365 |
| Person / Time |
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| Site: |
Prairie Island  |
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| Issue date: |
07/09/1984 |
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| From: |
Musolf D
NORTHERN STATES POWER CO. |
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| To: |
Office of Nuclear Reactor Regulation |
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| Shared Package |
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| ML20090D366 |
List: |
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| References |
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| RTR-NUREG-0737, RTR-NUREG-737, TASK-3.D.3.4, TASK-TM TAC-53458, TAC-53459, TAC-55476, TAC-55477, NUDOCS 8407180211 |
| Download: ML20090D365 (2) |
|
Text
f --
Northern States Power Company 414 Nicollet Mall Minneapoks. Minnesota 55401 Telephone (612) 330-5500 July 9, 1984 Director Office of Nuclear Reactor Regulation U S Nuclear Regulatory Commission Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING PLA!TI Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 Supplement No. I to License Amendment Request dated April 10, 1984 Revision to Main Control Room Habitability Study In letters dated January 30, 1981 and July 20, 1981 Northern States P wer Compr.ny submitted,for NRC review the control room habitability study fot Prairie Island required by NUREG-0737, Item III.D.3.4.
This study,
. performed by Bechtel Power Corporation, was subsequently approved by the Commission in a Safety Evaluation Report dated April 9, 1982.
The original Prairie Island control room habitability study concluded that toxic gas monitors would be required for detection of Chlorine, Ammonia, Hydrochloric..cid and Formaldehyde.
In response to these findings, instrumentation for detection of these four chemicals and isolation of the control room upon detection, were installed at Prairie Island.
Additionally, per the requirements of NUREG-0737, proposed Technical Specifications for these toxic gas detection systems were submitted to the Commission.
The Chlorine detection system Technical Specification has been issued and the Technical Specifications for the remainder of the toxic gas detection system are presently under review by the Commission.
In the time since the original study was performed, new methodology for the estimation of incapacitation times following exposures to toxic gases has become available. This new methodology was utilized by Bechtel Power Corporation during the performance of a control room habitability study for the Limerick Plant.
The use of this methodology resulted in a significant reduction in the number of toxic chemicals that would have to be monitored.
k 8407180211 840709 PDR ADOCK 05000282 P
PDR
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m Dir, NRR July 9, 1984 Page 2 Northem States Power Company Attached, for NRC review and approval, is a supplement to the original Prairie Island Control Room Habitability Study in which the new methodology discussed above has been utilized to re-evaluate the necessity of the existing toxic gas detection systems at Prairie Island.
This supplemental study concludes that of the original four gases found to require a detection system, only the chlorine detection system is necessary for the requirements of NUREG-0737, Item III.D.3.4 to be met.
Based on the results of this study, Northern States Power feels that the Ammonia, '.ydrochloric Acid and Formaldehyde detection systems are no longer required at Prairie Island and, subject to NRC approval, will no longer be utilized to satisfy the requirements of NUREG-0737, Item III.D.3.4.
In their place, human detection along with administrative controls and training of control room personnel will be utilized to provide protection from these gases.
Because only the chlorire detection system is required to meet the Commission's requirements, we are withdrawing our proposed Toxic Gas Monitoring System Technical Specification (Item 2 in our License Amendment Request dated April 10, 1984) from your consideration.
Because this letter and the attached report supplement our earlier application, no additional application fee is required.
If you have any questions on this letter or the attached study, please contact us.
N w.
David Musolf Manager-Nuclear Support Se ices DMM/EFE/ dab cc:
Regional Administrator-III NRR Project Manager, NRC Resident Inspector, NRC G Charnoff Attachment
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