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Category:INTERNAL OR EXTERNAL MEMORANDUM
MONTHYEARML20217F0841999-10-0808 October 1999 Informs That During 466th Meeting of ACRS on 990930-1002, CEOG Proposal to Eliminate PASS from Plant Design & Licensing Bases for CEOG Plants,Were Reviewed.Discussion & Recommendations,Listed ML20217C5311999-10-0808 October 1999 Notification of 991027 Meeting with Representatives of Gpu in Rockville,Md to Discuss Recent Control Rod Surveillance Performance Issues at TMI-1.Proprietary Portions of Meeting Will Be Closed to Public ML20212K8901999-10-0505 October 1999 Notification of 991027 Meeting with Util in Rockville,Md to Discuss Status of Licensing Actions Proposed & Currently Under Review by NRC for TM1-1 ML20216J0151999-09-29029 September 1999 Notification of 991020 Meeting in Forked River,Nj to Discuss Licensee 990922,response to NRC & Other Info Addressing Sale of Portion of Land That Is Part of Plant Site ML20216G3671999-09-10010 September 1999 Forwards CNWRA Program Manager Periodic Rept (Pmpr) for Period 990731-0827 ML20210U7571999-08-20020 August 1999 Forwards Info Received from Gpu Nuclear,Inc on 990820 in Preparation for 990823.Requests Info Be Docketed ML20210C9991999-07-22022 July 1999 Revised Notification of 990813 Meeting with Gpu Nuclear,Inc Rockville,Maryland to Discuss TMI-1 Licensing Action Status. Meeting Date Changed ML20210E9511999-07-12012 July 1999 Notification of 990805 Meeting with Representative of Gpu Nuclear,Inc in Rockville,Md Re Plant,Unit 1 Licensing Action Status ML20212H9621999-06-23023 June 1999 Revised Notification of Meeting with Gpu Nuclear,Inc to Discuss Proposed Mods to RBS Sys Procedures & HPI Cross Connect Lineup.Meeting Rescheduled to 10 A.M. on 990713 ML20195H8521999-06-18018 June 1999 Requests That Encl Questions,Faxed to Gpu Nuclear,Inc on 990616,be Docketed,In Preparation for Forthcoming Conference Call Re TS Change Request 248, Remote Shutdown Sys, ML20195H9911999-06-15015 June 1999 Notification of 990707 Meeting with Util to Discuss Licensee Proposed Mods to Reactor Bldg Spray Procedures & High Pressure Injection Cross Connection Lineup ML20206F2921999-05-0505 May 1999 Forwards Draft Questions Which Were Faxed to Licensee for TMI Unit 1,GPUN on 990505 in Preparation for 990506 Conference Call on TS Change Request 279 ML20206D1291999-04-28028 April 1999 Notification of 990507 Meeting with Gpu Nuclear,Inc in Rockville,Maryland to Discuss Three Mile Island,Unit 1 Licensing Action Status ML20205N3161999-04-0909 April 1999 Notification of Significant Licensee Meeting 99-19 with Util on 990423 to Discuss Emergency Feedwater Flow Discrepancies ML20197G6381998-12-0707 December 1998 Forwards Program Manager Period Rept (Pmpr) for Period 981024-1120 ML20196E2801998-11-30030 November 1998 Discusses Closeout of TAC MA1607 Re Cross Potential for common-cause High Pressure Injection Pump Failure IR 05000289/19983011998-11-0404 November 1998 Forwards NRC Operator Licensing Exam Rept 50-289/98-301 with as Given Written Exam for Tests Administered on 980824-27 at Facility ML20154G3451998-10-0101 October 1998 Rev 2 to Notification of Significant Licensee Meeting 97-73 on 981023 in King of Prussia,Pa to Discuss Actions Taken Re Engineering Corrective Action Performance Assessment Team Findings ML20153D9681998-09-24024 September 1998 Notification of 981006 Meeting W/Gpu Nuclear,Inc in Rockville,Md to Discuss Status of Licensing Actions Proposed & Currently Under Review by NRC for TMI-1 ML20237E8381998-08-28028 August 1998 Notification of 980917 Meeting W/Gpu Nuclear,Inc & Amergen in Rockville,Md to Discuss Sale & Transfer of TMI-1 from Gpu Nuclear,Inc to Amergen ML20237E4591998-08-20020 August 1998 Submits Rev 1 to Notification of Significant Licensee Meeting 98-73 W/Util in Middletown,Pa to Discuss Actions Taken Re Engineering Corrective Action PA Team Findings. Meeting Postponed ML20237C9401998-08-14014 August 1998 Notification of Significant Licensee Meeting 98-73 on 980828 W/Gpu Nuclear,Inc in Middletown,Pa to Discuss Actions Taken Re Engineering C/A Performance Assessment Team Findings ML20247M2191998-05-19019 May 1998 Notification of 980604 Meeting W/Gpu Nuclear Inc in Royalton,Pa to Discuss Status of Licensing Actions Proposed & Currently Under Review by NRC for TMI-1 ML20216B6871998-05-0808 May 1998 Notification of 980527 Meeting W/Representative of Gpu Nuclear,Inc in Rockville,Md to Discuss Licensee 980324 Submittal Re Control Room Habitability at TMI-1 IR 05000289/19980991998-02-26026 February 1998 Notification of Significant Licensee Meeting 98-22 W/Util on 980318 to Discuss SALP for Period Covering 960805-980124,as Documented in SALP Rept 50-289/98-99 IA-98-345, Discusses Licensing Basis for Letdown Line Break Outside Containment for Plant,Unit 11998-02-0606 February 1998 Discusses Licensing Basis for Letdown Line Break Outside Containment for Plant,Unit 1 ML20154B7931998-02-0606 February 1998 Discusses Licensing Basis for Letdown Line Break Outside Containment for Plant,Unit 1 ML20199H6701997-11-20020 November 1997 Notifies of 971212 Meeting W/Gpu in Rockville,Md to Discuss Control Room Habitability at Unit 1 ML20199E7071997-11-14014 November 1997 Revised Notification of 971119 Meeting W/Gpu Nuclear Corp,In Rockville,Md to Discuss Control Room Habitability at TMI-1 Nuclear Facility.Meeting Cancelled Until Further Notice ML20199B3111997-11-0606 November 1997 Notifies of 971119 Meeting W/Gpu in Rockville,Md to Discuss Control Room Habitability ML20212G9531997-11-0505 November 1997 Forwards Gpu SE Re Review of AP600 Shutdowm Ts.Section B.3.9.4 of STS Cites Gpu Nuclear SE 0002000-001 Rev 0,880520 as Ref E Temporary Containment Penetration Closure Devices Equivalent to Valve or Blind Flange ML20216E9871997-09-0808 September 1997 Notification of 970910 Meeting W/Util in Rockville,Md to Discuss Potential Dose Consequences from Postulated Steam Line Break & Postulated Accident Sys Leakage Limits ML20149D8881997-07-11011 July 1997 Notification of Significant Licensee Meeting 97-86 W/Util on 970725 in King of Prussia,Pa to Discuss Apparent Violations Re Failure to Recognize General Emergency Condition During 970305 Exercise ML20140G6231997-06-0505 June 1997 Notification of 970716 Meeting W/Gpun in King of Prussia, Pennsylvania for Presentation & Discussion Re Root Cause Determination for Recent QC Issues Performed by Gpun Per NRC CAL ML20151U4191997-05-23023 May 1997 Discusses Review of Two Addl Concerns Identified in 970407 Memo to Recipient from Special Insp Branch Re Addl Open Items Associated W/Dec 1996 Design Insp Rept 50-289/96-201 ML20148D9851997-05-21021 May 1997 Notification of Significant Licensee Meeting 97-57 W/Util on 970528 to Discuss Formal Exit Meeting for Licensee Remedial Emergency Preparedness Exercise on 970513 & Licensee Discussion Re NRC CAL ML20141E5381997-05-15015 May 1997 Notification of 970530 Meeting W/Representatives of Gpu Nuclear Corp in Rockville,Md to Discuss Status of Licensing Activities Associated W/Plant,Unit 1 ML20138D3161997-04-21021 April 1997 Notification of Significant Licensee Meeting 97-47 W/Util on 970430 to Discuss Root Cause Analysis of 970305 Emergency Preparedness Drill Weaknesses ML20140D5251997-04-18018 April 1997 Notification of 970502 Meeting W/Util in Rockville,Md to Discuss Schedules & Resolution of Issues Relating to Thermo-Lag Fire Barriers ML20135F8801997-03-0404 March 1997 Notification of Significant Licensee Meeting 97-27 W/Util on 970317 to Discuss Emergency Preparedness Insp Exit Meeting ML20138M3111997-02-20020 February 1997 Notification of 970306 Meeting W/Gpu in Rockville,Md to Discuss Three Mile Island,Unit 1 Reactor Pressure Vessel pressure-temp Limit Curves ML20147D8391997-02-12012 February 1997 Notification of 970220 Meeting W/Util Representatives in Rockville,Md to Discuss Status of Licensing Activities Associated W/Plant,Unit 1 Facility ML20133Q3031997-01-16016 January 1997 Notification of Significant Licensee Meeting 97-08 W/Util on 970131 in Middletown,Pa Re Safety Sys Functional Insp Exit Meeting ML20149M0471996-12-10010 December 1996 Forwards Internet Mail Received from PM Blanch ML20129K3731996-11-21021 November 1996 Notification of 961126 Meeting W/Gpun in North Bethesda,Md to Discuss TMI-1 SG Issues ML20135B0871996-11-15015 November 1996 Notification of Significant Licensee Meeting 96-118 W/Util on 961122 to Discuss Plant Motor Operated Valve Testing Program self-assessment ML20129K2561996-11-0505 November 1996 Notification of Significant Licensee Meeting 96-109 W/Listed Attendees on 961202-03 in Philadelphia,Pa to Provide Training,Resolve Interagency Exercise Scheduling Conflicts & Discuss Current Issues in Emergency Preparedness ML20136E3011996-10-31031 October 1996 Forwards Schedule for Activities at Plant for Next Few Months ML20134E9191996-10-29029 October 1996 Forwards Rationale for Inital Plants Selected for Design Insps & for Plants Considered for Second Quarter FY97 Design Insps ML20128G1661996-10-0303 October 1996 Summarizes 960924 Meeting W/Gpu Nuclear Corp in Rockville,Md Re Preliminary Responses to Staff RAI Concerning Request to Change EALs for TMI-1.List of Participants & Copy of Preliminary Response to RAI Encl 1999-09-29
[Table view] Category:MEMORANDUMS-CORRESPONDENCE
MONTHYEARML20217C5311999-10-0808 October 1999 Notification of 991027 Meeting with Representatives of Gpu in Rockville,Md to Discuss Recent Control Rod Surveillance Performance Issues at TMI-1.Proprietary Portions of Meeting Will Be Closed to Public ML20217F0841999-10-0808 October 1999 Informs That During 466th Meeting of ACRS on 990930-1002, CEOG Proposal to Eliminate PASS from Plant Design & Licensing Bases for CEOG Plants,Were Reviewed.Discussion & Recommendations,Listed ML20212K8901999-10-0505 October 1999 Notification of 991027 Meeting with Util in Rockville,Md to Discuss Status of Licensing Actions Proposed & Currently Under Review by NRC for TM1-1 ML20216J0151999-09-29029 September 1999 Notification of 991020 Meeting in Forked River,Nj to Discuss Licensee 990922,response to NRC & Other Info Addressing Sale of Portion of Land That Is Part of Plant Site ML20216G3671999-09-10010 September 1999 Forwards CNWRA Program Manager Periodic Rept (Pmpr) for Period 990731-0827 ML20210U7571999-08-20020 August 1999 Forwards Info Received from Gpu Nuclear,Inc on 990820 in Preparation for 990823.Requests Info Be Docketed ML20210C9991999-07-22022 July 1999 Revised Notification of 990813 Meeting with Gpu Nuclear,Inc Rockville,Maryland to Discuss TMI-1 Licensing Action Status. Meeting Date Changed ML20210E9511999-07-12012 July 1999 Notification of 990805 Meeting with Representative of Gpu Nuclear,Inc in Rockville,Md Re Plant,Unit 1 Licensing Action Status ML20212H9621999-06-23023 June 1999 Revised Notification of Meeting with Gpu Nuclear,Inc to Discuss Proposed Mods to RBS Sys Procedures & HPI Cross Connect Lineup.Meeting Rescheduled to 10 A.M. on 990713 ML20195H8521999-06-18018 June 1999 Requests That Encl Questions,Faxed to Gpu Nuclear,Inc on 990616,be Docketed,In Preparation for Forthcoming Conference Call Re TS Change Request 248, Remote Shutdown Sys, ML20195H9911999-06-15015 June 1999 Notification of 990707 Meeting with Util to Discuss Licensee Proposed Mods to Reactor Bldg Spray Procedures & High Pressure Injection Cross Connection Lineup ML20206F2921999-05-0505 May 1999 Forwards Draft Questions Which Were Faxed to Licensee for TMI Unit 1,GPUN on 990505 in Preparation for 990506 Conference Call on TS Change Request 279 ML20206D1291999-04-28028 April 1999 Notification of 990507 Meeting with Gpu Nuclear,Inc in Rockville,Maryland to Discuss Three Mile Island,Unit 1 Licensing Action Status ML20205N3161999-04-0909 April 1999 Notification of Significant Licensee Meeting 99-19 with Util on 990423 to Discuss Emergency Feedwater Flow Discrepancies ML20203E0321999-02-11011 February 1999 Staff Requirements Memo Re 990211 Affirmation Session in Rockville,Md (Open to Public Attendance) Re Secys 99-044 & 99-045 ML20197G6381998-12-0707 December 1998 Forwards Program Manager Period Rept (Pmpr) for Period 981024-1120 ML20196E2801998-11-30030 November 1998 Discusses Closeout of TAC MA1607 Re Cross Potential for common-cause High Pressure Injection Pump Failure IR 05000289/19983011998-11-0404 November 1998 Forwards NRC Operator Licensing Exam Rept 50-289/98-301 with as Given Written Exam for Tests Administered on 980824-27 at Facility ML20154G3451998-10-0101 October 1998 Rev 2 to Notification of Significant Licensee Meeting 97-73 on 981023 in King of Prussia,Pa to Discuss Actions Taken Re Engineering Corrective Action Performance Assessment Team Findings ML20153D9681998-09-24024 September 1998 Notification of 981006 Meeting W/Gpu Nuclear,Inc in Rockville,Md to Discuss Status of Licensing Actions Proposed & Currently Under Review by NRC for TMI-1 ML20237E8381998-08-28028 August 1998 Notification of 980917 Meeting W/Gpu Nuclear,Inc & Amergen in Rockville,Md to Discuss Sale & Transfer of TMI-1 from Gpu Nuclear,Inc to Amergen ML20237E4591998-08-20020 August 1998 Submits Rev 1 to Notification of Significant Licensee Meeting 98-73 W/Util in Middletown,Pa to Discuss Actions Taken Re Engineering Corrective Action PA Team Findings. Meeting Postponed ML20237C9401998-08-14014 August 1998 Notification of Significant Licensee Meeting 98-73 on 980828 W/Gpu Nuclear,Inc in Middletown,Pa to Discuss Actions Taken Re Engineering C/A Performance Assessment Team Findings ML20248H7001998-05-20020 May 1998 Staff Requirements Memo Re SECY-98-071,exemption to 10CFR72.102(f)(1) Seismic Design Requirement for TMI-2 ISFSI ML20247M2191998-05-19019 May 1998 Notification of 980604 Meeting W/Gpu Nuclear Inc in Royalton,Pa to Discuss Status of Licensing Actions Proposed & Currently Under Review by NRC for TMI-1 ML20216B6871998-05-0808 May 1998 Notification of 980527 Meeting W/Representative of Gpu Nuclear,Inc in Rockville,Md to Discuss Licensee 980324 Submittal Re Control Room Habitability at TMI-1 IR 05000289/19980991998-02-26026 February 1998 Notification of Significant Licensee Meeting 98-22 W/Util on 980318 to Discuss SALP for Period Covering 960805-980124,as Documented in SALP Rept 50-289/98-99 ML20154B7931998-02-0606 February 1998 Discusses Licensing Basis for Letdown Line Break Outside Containment for Plant,Unit 1 IA-98-345, Discusses Licensing Basis for Letdown Line Break Outside Containment for Plant,Unit 11998-02-0606 February 1998 Discusses Licensing Basis for Letdown Line Break Outside Containment for Plant,Unit 1 ML20199H6701997-11-20020 November 1997 Notifies of 971212 Meeting W/Gpu in Rockville,Md to Discuss Control Room Habitability at Unit 1 ML20199E7071997-11-14014 November 1997 Revised Notification of 971119 Meeting W/Gpu Nuclear Corp,In Rockville,Md to Discuss Control Room Habitability at TMI-1 Nuclear Facility.Meeting Cancelled Until Further Notice ML20199B3111997-11-0606 November 1997 Notifies of 971119 Meeting W/Gpu in Rockville,Md to Discuss Control Room Habitability ML20212G9531997-11-0505 November 1997 Forwards Gpu SE Re Review of AP600 Shutdowm Ts.Section B.3.9.4 of STS Cites Gpu Nuclear SE 0002000-001 Rev 0,880520 as Ref E Temporary Containment Penetration Closure Devices Equivalent to Valve or Blind Flange ML20216E9871997-09-0808 September 1997 Notification of 970910 Meeting W/Util in Rockville,Md to Discuss Potential Dose Consequences from Postulated Steam Line Break & Postulated Accident Sys Leakage Limits ML20149D8881997-07-11011 July 1997 Notification of Significant Licensee Meeting 97-86 W/Util on 970725 in King of Prussia,Pa to Discuss Apparent Violations Re Failure to Recognize General Emergency Condition During 970305 Exercise ML20140G6231997-06-0505 June 1997 Notification of 970716 Meeting W/Gpun in King of Prussia, Pennsylvania for Presentation & Discussion Re Root Cause Determination for Recent QC Issues Performed by Gpun Per NRC CAL ML20151U4191997-05-23023 May 1997 Discusses Review of Two Addl Concerns Identified in 970407 Memo to Recipient from Special Insp Branch Re Addl Open Items Associated W/Dec 1996 Design Insp Rept 50-289/96-201 ML20148D9851997-05-21021 May 1997 Notification of Significant Licensee Meeting 97-57 W/Util on 970528 to Discuss Formal Exit Meeting for Licensee Remedial Emergency Preparedness Exercise on 970513 & Licensee Discussion Re NRC CAL ML20141E5381997-05-15015 May 1997 Notification of 970530 Meeting W/Representatives of Gpu Nuclear Corp in Rockville,Md to Discuss Status of Licensing Activities Associated W/Plant,Unit 1 ML20138D3161997-04-21021 April 1997 Notification of Significant Licensee Meeting 97-47 W/Util on 970430 to Discuss Root Cause Analysis of 970305 Emergency Preparedness Drill Weaknesses ML20140D5251997-04-18018 April 1997 Notification of 970502 Meeting W/Util in Rockville,Md to Discuss Schedules & Resolution of Issues Relating to Thermo-Lag Fire Barriers ML20135F8801997-03-0404 March 1997 Notification of Significant Licensee Meeting 97-27 W/Util on 970317 to Discuss Emergency Preparedness Insp Exit Meeting ML20138M3111997-02-20020 February 1997 Notification of 970306 Meeting W/Gpu in Rockville,Md to Discuss Three Mile Island,Unit 1 Reactor Pressure Vessel pressure-temp Limit Curves ML20147D8391997-02-12012 February 1997 Notification of 970220 Meeting W/Util Representatives in Rockville,Md to Discuss Status of Licensing Activities Associated W/Plant,Unit 1 Facility ML20133Q3031997-01-16016 January 1997 Notification of Significant Licensee Meeting 97-08 W/Util on 970131 in Middletown,Pa Re Safety Sys Functional Insp Exit Meeting ML20149M0471996-12-10010 December 1996 Forwards Internet Mail Received from PM Blanch ML20129K3731996-11-21021 November 1996 Notification of 961126 Meeting W/Gpun in North Bethesda,Md to Discuss TMI-1 SG Issues ML20135B0871996-11-15015 November 1996 Notification of Significant Licensee Meeting 96-118 W/Util on 961122 to Discuss Plant Motor Operated Valve Testing Program self-assessment ML20129K2561996-11-0505 November 1996 Notification of Significant Licensee Meeting 96-109 W/Listed Attendees on 961202-03 in Philadelphia,Pa to Provide Training,Resolve Interagency Exercise Scheduling Conflicts & Discuss Current Issues in Emergency Preparedness ML20136E3011996-10-31031 October 1996 Forwards Schedule for Activities at Plant for Next Few Months 1999-09-29
[Table view] |
Text
..
JUL 161979 i
F E.'-CPEDUf' FOR : Ccemissioner Cilinsky FRPf': P. R. Penton, Director Office of *'uclear Peactor Reculation TI'PU: Fxecutive Director for Operations (signed) T. A.Rehm SUFJECT: TPI CPf!TAINf'EMT PUPGlf'C Ycur June 4 rcrorandun suggests that a substantially greater arount of radio-activity right have been released at TMI if purcing had been in procress at the tire e# the accident, t'e have conservatively estirated the release for !
this bypothetical case. The purne systen would have been isolated in this case by darpers actuated by radiation ronitors in the purce discharce lines. ,
The conitorinc syster perfoming this function is separate frcr the containnert isclation syster and is primarily designed to control discFarpes te levels consistent with 10 CFR part :'O lirits. Parpers lccated both in the intake and exhaust of each of the two purce trains close upon receipt of a sicral fran .
the scintillation detectors which ronitor radicactivity in the rurge line dis- l charge. resed upon tFe real time scenario of the TUI-2 accident, these calcu- ,
latiors show that insicnificant radioactive releases would have cccurred both j rrior tn darper closure and free. leaFace around tFe darpers durinr' the twenty cinutes assured for ranual response by the operator to close the purge isola-tien valves.
?urirq ti.is toenty rinutes of assured relecse, t!'e leaFar'e past the intaFe Mr. rer 'eculd have been unfiltered, with recrEct to radioactivitu, except for a '
rarticulate irefilter. TFe leakace past the exhaust da'rer, bo"ever, veuld Fwe :
b(en #iltered by a particulate rrefilter, PEPA filters, cFarcoa.1 adsorbers, ard a 'inal rarF cf HEPA filters. All nomal purge extausts are treated by this
'ilter train.
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.............1 NRC PORM 318 (P.76) NRCM 0240
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Ccersis::ioner Gilinsky Indicator lights on Panel 25 in the control roon at FI-P provide a constant sin-nal showing the position of the purae line isolation valves. This display papel is not observable from positions nomally occupied by the operators. Powever, the containment purge radiation monitors alam both audibly and visually to the crerator and should provide sufficient warning to cause the operator to close the purae isolation valve within the twenty minutes the staff norrally uses for manual response.
Uith respect to automatic isolation of purge valves by biqh radiation signal in other operating reactors, the Division of Operating Peactors is presently revieM-inr' the contairrent purne and venting on a generic basis. The Pulletins and Orders and Lessens Learned task forces are also reviewinq containment isolation provi-sions, cenerally. The 00R review is addressing the need for purging nr venting at pmzer and includes consideratien of accidents during tFese operations.
Tt e need for diverse sinnal actuation of containment isolation for all ,perating reactors has been identified by the Lessons Learned Tash Force. An action Feine recer ended for irplcrentation by this group will alleviate potential problems in the area you Fave identified. One of the sFort tem recommendations involves the backfit recuirerent for diverse and more selective containrent isolation pro-visions for PWPs and P'APs. then implerented, this action vill assure that all operating reactors will 1) provide containment isolation on diverse sinnals in confomance with Fection 6.2.4 of the Standard Peview Plan, 2) review isolation provisions for nonessential systers and revise these provisions as necessary, and
- 2) rodify contairrent isolation designs as necessary to eliminate rotential 'or inadvertant reopening upon reset of the isolation sinnal.
..Qs Farold C. renten, Director Office cf Fuclear Peactor Peculatico .
cc: CFair'.an Pendrie rov"issioner Kernedy Distribution: .
Comissioner Erndford LVGossick rer nissioner /hearne ED0 6462 3 L. V. 00ssich SECY PE M
- SEE k VIOUS YELLOW FOR CONCURRENCES DOR:SP DSE DOR CSS
/ G NM RHVollmer* DRMuller* DEisenhut* RMittson LVG@ossick HRDcTton .
07/06/79 07/09/79 07/06/79 07/ /79 07//f/79 07/fg70
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i Commissioner Gilinsky - 3- !
DISTRIBUTION:
T. Rehm E. Cornell H. Denton E. Case R. Boyd i R. Mattson V. Stello PSS
- 0. Muller W. Kreger ;
R. Vollmer D. Eisenhut i G. Knighton !'
W. Butler J. Collins .
G. Lainas
L. Nichols i R. Bangart NRC PDR Central File NRR Reading File (P-428) .
ETSB Reading File !
ETEB Subject File 20.9 G.Ertter(ED0-06462)
M. Groff ,
C. Paul ,
A. Ferguson i
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pats * ......................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .,,,,,..,,!
NBC JCRM als (9 76) NacM 0240 "A u.s. sevea weat aataviae ****cs : * *** se e **
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N Certissioner Cilinsky I r
? Ef'ORNTIT FCP: '
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H. P. Penton, Director '
FRrh Cffice of t'uclear Peactor Reculatiog {
,i '
Executive Director for Operatices TFPU:
TFI C0rTAITENT PUFGING / {
SUNECT: '
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bia' twin the event of.'shichTul-L. cent.aintoent i
,' ourjune A.rer.:c.fimdur.dcorractly state Pcw- '
Y o ron rirnal ,
'prTssure sicnal while purnine, cmitaineent isolatio ii 1
fr v the containrcnt' purne-enttiation , rentt Y?Ms3u tor = tc~.
. . , f s ~
l
+w succest4*a thf 4 suYsGitially greater arourthoftire
- radio- l' In r=rc~a activity nicht have boon releasc t in t! e porce been isolated in tSis The rase bysyster, tronitoring darpers actuated perfonsinq by<unctien this radiction ronitors is separate i dischar"e
'ren thelines. containrent isciation systm and-lirits.is primarily designed to ! c ,
Part 2n rar ners located both ctarccs to levels consi<, tent uith 10 CFD i s close uren receipt o# '
in the intake and exhat.tt of each of the two purge tra t in tbc S I-r accident, Ll a sienal frm the scintillation detectors which rased upon the real tire scerario of the roritor r.nHeactivity rurce line discFarge, '
r rers i ucinn
+ese calculations show that insicnificant radioactive rel recurred Soth prior to dcrrerfor closure parual artresrense by tro crerater *c cicse t'o ;
? trenty rinutes issure(' ;;
rurr e isolaticn valves. de !
?urinc this toonty rinutes of assur.ed release, tSe leakc9e #cr a past t'e l
ri arrnr tculd have been urfiltered, vitTFe ledage past the extaust l W ortcrc,r'arrer, and Forever, t '
rarticulate
%n #i? termtrefiltrr. ty a particulate profilter, " EDA filters, charcoa trutad hv th i final %d nf trr's filters, til rcera' rurce e@aus+.5 3rn ,
- ilt?r train. .
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N Cchrissiorer CilinsFy -?-
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Irdicate'r,14Fts on Panel 20 in the control recr at TF'I-? rrovide a constant sic-nal showinh the pcsition of the purne lire isolation valves. This d4rlav rarel is net obser;vable fro" Positions ncrrally occupied by the operators. !'crever, tre contain-ent purge radittien monitors alann both audibly and visually to tFe orerator and shhuld provide sufficient warnine to cause the orcrator to close tFe rurge isolation valve within the twenty minutes the staff nomally uses for manual response. \
t ith respect to autenatic isolation of rurce valves by birt radiation sinnal in otter oceratinq reactors, the staf# is Presently reviewinc the certainrent nur<]e and ventinc on a pencrik basis. The Fulletins and Orders and Lessons Lcarred task fcrces are also reviewing tFe containc ent purge and ventirn. This review is ad-dressinc the need for purc4ro or ventirq at power and includes corrideration of accidentsdurinatresecreragiens.
The Containrent Systers "ranck. Pes primary restaansibility fer containrent isola-tien licensino review. The T"I-0 conteinrent rurce syster has ':ren evaluated ccccrdinc to the recuirerent set 'forth in FrancF 7echnical Position (PTP) F t.,
"Contairrent Purcing Purinc "crral Tiant Prerations", which recuires in Part t! at ti.e irstrurentation and control syster.s previr'ed to isolate the purne syster lines should he actuated by diverse parareters. The cortainrent porco renitorirn sycte s are renuired by Standard Ocvieu Plan P.rP) Eection 11.E, ""rncess and r"luent Padiological onitorinc and Sarrlinq Svsters", and are reviewed hv the '
cfunnt Treatrent Systees Franch.
S'arold P.' Perten, Piractrr Office nf Yucicar e nacter erulation ec: &airran Pondrie e& rissionar "ennedv Co-n'issioner " rad #nrd err-issioner Mearne
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' F'-CP.V 'U?' Frf' : Ccmissioner c.ilinsky [
F9rP: P. D. Penton, Pirecter '
effice of ';ucicar Peactor Pegulation TFP'/: Executive rirector fcr "reratiers
":TJECT: 7"I C"': TAI'M?'T PUPGIFC !
Vcor Jure 1 renorandur su" costs that a substantially qreater arcunt c' rc'fic.- i activit[e tFe tir o#y t5c richtaccident. have been Ye releated kave conservatively at 3'! if reroirg bad been estirated theinreleate
~
procrets forat ,
tFit Nyrett sical case. The rurce syster would have been isolated it thi!
case 'v errers actuated Sy raciatien reniters in tSo perce discharce lines.
~
Tic rcnitcrirq svstor Perferrine this function is serarato frc~ the centattrort isciation syttrr' and is prirarily desicned to enntrol ditc' rarces tc invels consistent 5,ith tr CT*' nart 70 lirits. Parrers !ccatov bcth in t'e intMe and c?aur.t of each ce the tre purce trairt close uron receirt of a ':icral 'rar t'e scir.tillatten detectors vtic$ rcritor radicactivity in tFe rurae lina ' f :-
c' arce. ate' teren the real tire scerario c# the T' !-? accident, these calcu-latfors sboit that insicni'icant radicactive releaces muld have cccurred t.cth
,"h i cutts assurcdrict fortorarual dar rer closure by rectr'nse andthe 'rcrcrerater lealace to arcund closetFe thetarpers curae durire i'cla- the twenty tien valves.
e r i r o tHs b enty "inutes of a ,sured relecse, tre Inatace rest t' 9 frtake c rer sculd tave been unfiltered, with retrect te rer.iractivi'v, orcurt #ce a rart icul .3te trafilter. ibe leatar;e part ;Fe c,eanst dar rer, Wever, veule tavo Penn 'iltered ':y a r:rticulate rrr#ilter, FfM filtars, c! arccal af'torbers, and j c 'i .21 e nt c' W 'il ters. 711 nor al nnr e exFat.sts are trea+e 'y t'is ;
- iltar train.
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OFFICE P ,, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , . . . , , , , , , , , , , . . . . , , , , , , , , , , , , , , ,,,,,,,,,,,,,,,,,,,,,,, , , , , , , , , , , , , , , , , , , , , ,
guttee AssE D .........................
, , , , , . . , , , . . . . . . . . . . . . , , , , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...................... ,,,,............,n, e
SATE D .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " " . . " ' " . * " * " " . . " * " . " * * . . . . . . . . . . . . . " . . . . . . . .
NRc MAM Me (9 76) NRW 0240
- u.s **vs'aau s at **5at'a* ***'* * ' ',v e . e s e . v e e
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%rissioner "flinpy -T- !
Irdicator lir hts on nanel r' in the control roor at TI-P rrevide a constant sin- .
ral sForine t'e position of the rurce line isolatien valves. This dis;1ay p.1rel ,
is r,ct c5servallo fry: positions rer ally nccupirni by the operators. Fettever, the certainrent per e radiation ronitors alare both cudibly and visually to the '
crrrator and should Provide'sufficier.t warnity to cause the operator tc close tFe ;
i:crae isolation valve uitbin the twenty rinutes the st3'f norrally uses fer :
canual resrorse.
':ith respect to autoratic isolation n' purce valves by hich radiation sinnal in
- other creratinn reactors, the rivision of f'reratinq onactors ie. creeoatly revier- :
irc tPa containe ent pur"e arr' ventina en a qeneric basis. The "u11etins and r ders r end lessens Learner' task forces are also reviewinc contaireant isclaticn trovi- l sions , -ontrally. Tbo cro revieu 1e, addressico tFe need fer nurcino er ventire at rever and includes consideratien cf accidents durinn those conrations.-
iPe aNd for diverse stenal ectnetion c# containrent isobtion 'cr all creratirc .
rnactors ! as S ecn identified by tFe LMecns Learard Tett rcree. f.n action Feir" rvr ' ended for irpiecntation by this creen will allevia+c retential rrchiers in t' e arca .%u bave icentified. One of. the sFort terr recorrendations involves ,
the ! ecLfit recuirerent 'cr <11 verse and ~ ore telective containrent isclaticn irc- ;
visions for P.rs and Ors. tren irplerented, this action will assure that all ornratinc reacters uill 1) r.revide contain ent isolation er divers,r si~nals in ,
cen'orearce with "ection 0.2.a cf the Starr'arr* revice Plan, 7) revicu iscicticn
- revisiens fer nonessertial systers aad revise these provisiers as nneessary, and '
) "cdify contair: rent isolation desinns as necessary to elirirate poter.tial 'or inMyertant recpening u;on reset cf the ise.latica sienal .
"arnic S. " enter, ^1ractor .
f" ice n# huCloar ~eacter Scctl d *. i c t' cc: chair an ondrie r
cc issicr.rr Fr.rrm ?
Gr* is%irner " raf'ferd r er t.issioner " r1rne I. V. "OSciCl
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Nac romu sis (9 76) nacu o240 --Au........-.v.............i...........
Cornissioner Gilirsi:y - 2-DISTPIPUTI0f':
T. Rehn E. Cornell P. Denton E. Case R. Ecyd P. t'attson
- v. Stello DSS C. "uller
. Krecer P. t!allrer D. Eisenhut C. Kniobton
'.J . Putler J. Collins G. Lainas C. Crires L. "ichols P. Pangart t'pc prp Central file f.rP Peadinc file (P-42P)
ETER Peading File ETSP Sutrject File 20.9
- c. Ertter (E00 rC4C?)
. Croff C. Paul
- s. forguson arries * . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . . . . . . . . . . . . .
eum.aun + . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
onre k , . . ..... . . . . . . . . . * **. . .. . ...
NRC PORM 318 (9 76) NRCM 0240 N w 8 *
- v e a "u s a' '"'""* * * ' ' ' ' ' ' e a s s v e s b
czymww. +.
FROM: ACTION CONTROL DATES CONTROL NO y gg(geggy Gjjj g y , COMPL DEADLINE t;/111[73 06462 ACKNOWLEDGMENT DATE OF DOCUMENT INTERIM REPLY b[d((.8 TO: PREPARE FOR SIGNATURE OF:
liarold Denten , FINAL REPLY / '
O CHAIRMAN FILE LOCATION O EXECUTIVE DIRECTOR
/ M ten OTHER:
DESCRIPTION O LETTE R. C MEMO C REPORT C OTHER SPECI AL INSTRUCTIONS OR REMARKS Qwstions on unat would nave nappened if tin contairasent ventilation valves had been opm for containasnt p; tug at the time of the mi accident CLASSIFIED DATA
, OOCUMENT/ COPY NO. CLASSIFICATION l NUMBER OF PAGES CATEGORY POSTAL REGISTRY NO. C NSI C RD C FRD ASSIGNED TO: DATE INFORMATION ROUTING LEG AL REVIEW G FINAL C COPY 9, gj f79 gggjg ASSIGNED TO: DATE G AL OBJECTIONS DE C EDO ADMIN & CO ARES BR
(,Uffdl] } EXT.
j i, COMMENTS NOTIFY:
l EXT.
f JCAE NOTIFICATION RECOMMENDED: O YES O NO NRC FORM 232 EXECdTIVE DIRECTOR FOR OPERATIONS ' '
"" 00 NOT REMOVE THIS COPY PRINCIPAL CORRESPONDENCE CONTROL l