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| {{#Wiki_filter:'I J IO.'GA'PART 5r}DOC."ET fi,1ATERIAL CONTROL NQ FlLE':ROiyi Indiana&Michigan Pwr c<Dam York, NY~~J Tillin hast DATE'OF DOC 4-1'4-75 DATE REC'D 4-18-75 TM!X APT'QTf<'ER TO:-Mr Kniel CLASS UNC LASS PROP.INFO ORIG one signed.INP.UT CC OTHER NO CYS REC'D ii i'iii'SENT LOCAL PDR DOCKET NO:.DESCR IP flOii!: Ltr re our 3-14-75 ltr':...trans tie'.following: | | {{#Wiki_filter:'I J IO .'GA'PART 5r} DOC."ET fi,1ATERIAL CONTROL NQ FlLE':ROiyi Indiana & Michigan Pwr c DATE'OF DOC DATE REC'D TM!X APT 'QTf<'ER |
| PLANT NAI<<E cook 1&2 ENCLOSURES:
| | <Dam York, NY ~ ~ |
| Responses to Qu'estions. | | J Tillin hast 4-1'4-75 4-18-75 TO:- |
| concer'ning boron precipitation following LOCA..~~~~Tf,ITi Pt)pig toogo~l~'!;",i",;,"'OR ACTIQi'Iiv'FQ iii ATION 4-21-75 ehf BUTLER (L)W/Copies CLARK (L)Vir/Copies PARIS (L}~~~r ill Mor/IC 5 I:NIEL (L)~LY/copies SCHWEf!CF.R (L)W/Copies STOLZ (L)W/Copies VASSAE.I.O (I)i'v/" Copies PUI<PLE (L)W/Copies Z I Ei iANiir (L)W/Copies DICIiFA (=}W/,Copi s Kii!IG!9 r O4 ir-I'h"i'/Copies YOUN G B LOOD (E)W/'opies BEGAN (E)W/Copies LEAR (L)W/Copies Sr>Fr S W/Copies W/Copies INTLBii.'AL DIS1RIBJTION | | Mr Kniel ORIG one signed CC OTHER ii i 'iii'SENT LOCAL PDR CLASS UNC LASS PROP. INFO . INP.UT NO CYS REC'D DOCKET NO: |
| :G F~OGC, ROO';i P-506A'.~OSSICK/STAFF | | . DESCR IP flOii!: ENCLOSURES: |
| ~CASE ,6 lhi".I BU SSQ.~13OYD.I;~iOQI1 f: (l.)DE YOU.i" G (L)Sl'OVHQl.T (L)GOLLEI<(L)(L<r)P.COLLINS DE Nl SE flf=G C)i" 8 Wf-Il L=7'iEGIOiM (2)T.f).W I LSON STEELE Tf.Cll R"Vlf"/SChflOE DE 8 I'i'rACCAAY
| | Ltr re our 3-14-75 ltr':...trans tie'.following: Responses to Qu'estions. concer'ning boron precipitation following LOCA.. |
| .KNIGHT PAWLICKI S.l IAO" si FLI.or;"s.) | | ~ ~ |
| HOUSl ON<<.fiiOVAIC.
| | ~ ~ |
| +IOSS IPf'OLITO TL DLSCO LONG Lhl NAS BE Nh f'iOYA VOLLEY'>EH DE i~!TQi" CiR ii.'iES GhiiiM I L L I ASlNEA BALf..hflD SPhixG.LE.R EfilVI fiO f<<ULI.I'DICI(f: R I;NIGHTON YOUNG B LQOD REGAN PROJFCT LDfi IIAA Lf::SS LIC ASST R.DIGGS (L)H.G E AP IN (L)E, GOULBQUriihe (I)P.KREUTZER (E).I.LEE: (L)f<: I,';AICRLT (L)S.REED (E)~t<<.SEhVICI'l.)
| | Tf,ITiPt )pig toogo~l~ '!; ",i",;,"'OR PLANT NAI<<E cook 1 & 2 ACTIQi'Iiv'FQ iii ATION 4-21-75 ehf BUTLER (L) SCHWEf!CF.R (L) Z I Ei iANiir (L) BEGAN (E) |
| S.SI-IrEf>rPARD (L)M.SLAl'EA (E)f<.SivilTII (L}S.TEETS (L)G.V>I L L I A i'vi S (E)V.Vill LSO'ii (L)fl.I N G RAID ('L)h/T Ii'!rD.8 f)A!l i;iA'!SA LTZ'1 AN f<<E LTZ.Pl A<xS" iYrCDONALD CHAP;ii AiY, DU('>E (Llr)E.COUP.": PETiF RSO;!fihRTfrIELD (2)Kf.f:CfiE R F.I SE N I IU T',)VIGGINTrQN I'XTEfiii!AL DISl RIBUTIOi'2 | | W/ Copies W/ Copies W/ Copies W/ Copies CLARK (L) STOLZ (L) DICIiFA (=} LEAR (L) |
| ~'I-LOCAL PDA S++OSeP~1-T!C (Af>FI>iqhTHY) | | Vir/ Copies W/ Copies W/,Copi s W/ Copies PARIS (L} VASSAE.I.O (I ) Kii!IG!9 r O4 ir-I Sr>Fr S illr |
| (1}(2)(10} | | ~ ~ ~ |
| -N>'iTIONAL LABS~l-fxSI C (f1UQHAiuANr) 1-W.f'ErINI..GTON, firn E 201 GT 1-ASLB-CQi'JSU LTA:4lr'S 3-Mevetori Ari'Iccsof1
| | Mor/IC 5 i'v/" Copies 'h"i'/ Copies W/ Copies I:NIEL (L) PUI<PLE (L) YOUN G B LOOD (E) |
| " fiILEWih'Ih!1K/B LUi'8 E/AG GAB I AN~l I iii CBS li&-HsQiV>E/SEiiT
| | ~ LY/copies W/ Copies W/'opies W/ Copies INTLBii.'ALDIS1RIBJTION |
| '4.A.1 1-PD'Ii,>'AI'I'LA, fx>Y 1-fifrOOKllAVEiI
| | :G F Tf.Cll R "Vlf"/ DE i~!TQi" LIC ASST h/T Ii'!rD . |
| ~AT l i'>1-G.Ul.'filKMO:0, C;::L 1-AG~If:D (AUr-fl GL;S;-:;;;;}
| | SChflOE DE 8 CiR ii.'iES R. DIGGS (L) l 8 f)A! i;iA '! |
| flin B 127 Gil'-J.D.AL'Rf LE", Arn E 201'T | | ~OGC, ROO';i P-506A I'i'rACCAAY GhiiiMI L L H. G E AP IN (L) SA LTZ'1 AN |
| ~~~~~~~'5~'5~
| | '. ~OSSICK/STAFF KNIGHT I ASlNEA f<<E LTZ. |
| INDIANA II MICHIGAN POWER COMPANY P.O.BOX 18 BOWLING GREEN STATION NEW YORK, N.Y.10004 April 14)1975 Docket No.50-315 and 50-316 CPPR No.61, DPR No.58 pock,'g Ep~gcgRC],qgt5 Mr.Karl Kniel, Chief Pressurized Mater Reactors Branch No.2 Directorate of Licensing U.S.Nuclear Regulatory Commissa!5n Nashington, D.C.20555
| | . E, GOULBQUriihe (I ) |
| | ~CASE PAWLICKI BALf..hflD P. KREUTZER (E) |
| | ,6 lhi".IBU SSQ S.l IAO |
| | " si FLI.or;"s.) A<xS |
| | .~13OYD. |
| | SPhixG.LE.R .I. LEE: (L) f<: I,';AICRLT (L) " PliYrCDONALD I;~iOQI1 f: (l.) HOUSl ON EfilVIfiO S. REED (E) CHAP;iiAiY, DE YOU.i"G (L) <<.fiiOVAIC. f<<ULI.I' ~t<<. SEhVICI'l.) DU('>E (Llr) |
| | Sl'OVHQl. T (L) +IOSS DICI(f:R S. SI-IrEf>rPARD (L) E. COUP.": |
| | GOLLEI< (L) (L<r) IPf'OLITO I;NIGHTON M. SLAl'EA (E) PETiF RSO;! |
| | P. COLLINS TL DLSCO YOUNG B LQOD f<. SivilTII (L} fihRTfrIELD (2) |
| | DE Nl SE LONG REGAN S. TEETS (L) Kf.f:CfiER flf=G C)i" 8 Lhl NAS PROJFCT LDfi G. V> I L L I Ai'vi S (E ) F. I SE N I IU T Wf-Il L=7'iEGIOiM (2) BE Nh f'iOYA V. Vill LSO'ii (L) ',)VIGGINTrQN T.f). W I LSON VOLLEY'>EH IIAALf::SS fl. I N G RAID ('L) |
| | STEELE I'XTEfiii!ALDISl RIBUTIOi'2 |
| | ~'I LOCAL PDA S+ +OSeP 1 |
| | ~1 T!C (Af>FI>iqhTHY) (1}(2)(10} N>'iTIONAL LABS 1 PD'Ii,>'AI'I'LA,fx>Y |
| | ~l fxSI C (f1UQHAiuANr) 1 W. f'ErINI..GTON, firn E 201 GT 1 fifrOOKllAVEiI AT l i'> ~ |
| | 1 ASLB CQi'JSU LTA:4lr'S 1 G. Ul.'filKMO:0,C;::L 3 Mevetori Ari'Iccsof1 " |
| | fiILEWih'Ih!1K/BLUi'8 E/AG GAB I AN 1 AG~If:D (AUr-fl GL;S;-:;;;;} |
| | ~l I iii CBS li&-HsQiV>E/SEiiT ' |
| | 4.A. J. |
| | flin B 127 Gil' D. AL'Rf LE", Arn E 201'T |
|
| |
|
| ==Dear Mr.Kniel:==
| | ~ ~ ~ ~ |
| 4Ip~/Pgg.p In response to your letter dated March 14, 1975, the system capabilities and operating procedures with regard to boron precipitation following a postulated loss-of-coolant accident (LOCA)have been evaluated for the Donald C-Cook Nuclear Plant, Units 1 and 2.The results of this evaluation are discussed below.The operating.procedures for the Donald C.Cook Nuclear Plant require switchover of the emergency core cooling system (ECCS)from Reactor Coolant System cold leg to hot leg injection 21+hours after the accident.This procedure will preclude the possibility of exceeding boron solubility limits as is shown in the attached analysis.This analysis was also transmitted to Mr.T.M.Novak of the NRC staff in a letter from C.L.Caso of the Nestinghouse Electric Corporation designated, in CLC-NS-409 and, dated April 1, 1975.Also enclosed is a copy of the Donald C.Cook Nuclear Plant operating procedure 0HP 4022.008.002 titled"Initiation of ECC Recirculation Phase" which is the operating procedure calling for switchover from cold leg to hot leg injection.
| | ~ ~ ~ '5 ~ '5 ~ |
| lIItith regard to system capability, redundancy in equipment is provided.in both the high head and low head systems for hot leg recirculation.
| |
| Each safety injection pump and low head (RHR)pump share a header which injects into two cold, or two hot legs.The switch-over from cold to hot leg injection is accomplished.
| |
| by
| |
| ~'~~1 Wt a'I 1 e, WI ,.~V~%W I r r~.I~WW~~1~I t''W~~~1 1 r w,>>~W~, Ij I~1 Jl w 4 lf'*~A~1 ht~I~'~~1 gtt W'''~I'p'ji IW 1~1~1 W'V 1 Mr-Karl Kniel April 14, 1975 closing the cold leg motor operated valve, and opening the hot leg motor operated valve.Thus with the worst single failure at least one high head and one low head pump are available for hot leg recirculation. | |
| This system is described in the Donald, C.Cook Nuclear Plant Final Safety Analysis Report, Section 6 and Appendix I.There is a question on the environmental effects on the motor drives for the valves which are'sed to transfer from cold to hot leg injection which we are in the process of resolving.
| |
| We are currently investigating this and will notify the Commission of our findings as soon as our investigation is completed.
| |
| Very truly yours, J i ghast Vice President JT:ma cc: Gerald Charnoff, Esq.Richard Walsh, Esq.Robert J.Vollen, Esq.Robert C.Callen, Esq.Peter W.Steketee, Esq.R.S.Hunter R.W.Jurgensen-Bridgman 0'h If~~h~r<'h~c h'Lh'
| |
| , ATTACHMENT TO REM-62811!Yethouse El.ctric Corporation Povser Systems P VS Systems ONtstatt Box355 Pittsburt,hPernsyttrerz 15230 April 1, 1975 CLC-NS-309 t Hr.T.H.Novak Chief, Reactor Systems Branch U.S.Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Haryland, 20014,
| |
|
| |
|
| ==Dear Hr.'ovak:==
| | INDIANA II MICHIGAN POWER COMPANY P. O. BOX 18 BOWLING GREEN STATION NEW YORK, N. Y. 10004 April 14) 1975 Docket No. 50-315 and 50-316 CPPR No. 61, DPR No. 58 pock,'g Ep |
| As we have discussed, enclosed is a discussion of some phenomena concerning the long tern build up of boric acid in the core region following a postulated LOCA.This discussion is a generic document covering l!estingttouse 2, 3 and 4 loop plants.The discussion re-emphasizes the adequacy of'
| | ~gcgRC |
| | ],qgt5 4Ip ~/Pgg .p Mr. Karl Kniel, Chief Pressurized Mater Reactors Branch No. 2 Directorate of Licensing U.S. Nuclear Regulatory Commissa!5n Nashington, D.C. 20555 |
| | |
| | ==Dear Mr. Kniel:== |
| | |
| | In response to your letter dated March 14, 1975, the system capabilities and operating procedures with regard to boron precipitation following a postulated loss-of-coolant accident (LOCA) have been evaluated for the Donald C- Cook Nuclear Plant, Units 1 and 2. The results of this evaluation are discussed below. |
| | The operating .procedures for the Donald C. Cook Nuclear Plant require switchover of the emergency core cooling system (ECCS) from Reactor Coolant System cold leg to hot leg injection 21+ hours after the accident. This procedure will preclude the possibility of exceeding boron solubility limits as is shown in the attached analysis. |
| | This analysis was also transmitted to Mr. T. M. Novak of the NRC staff in a letter from C. L. Caso of the Nestinghouse Electric Corporation designated, in CLC-NS-409 and, dated April 1, 1975. Also enclosed is a copy of the Donald C. Cook Nuclear Plant operating procedure 0HP 4022.008.002 titled "Initiation of ECC Recirculation Phase" which is the operating procedure calling for switchover from cold leg to hot leg injection. |
| | lIItith regard to system capability, redundancy in equipment is provided. in both the high head and low head systems for hot leg recirculation. Each safety injection pump and low head (RHR) pump share a header which injects into two cold, or two hot legs. The switch-over from cold to hot leg injection is accomplished. by |
| | |
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Cook Unit 1 Low Temperature Overpressure Protection System (Ltops) Analysis for 48 EFPY, Dated March 5, 2020, Attachment 2 Only (Non-Proprietary) ML20108F0002020-02-28028 February 2020 Enclosure 5 - WCAP-18455-NP, Revision 1, D.C. Cook Unit 1 Heatup and Cooldown Limit Curves for Normal Operation, Westinghouse Electric Company, February 2020. (Non-Proprietary) ML18334A2712018-09-30030 September 2018 WCAP-18394-NP, Revision 1, Fatigue Crack Growth Evaluations of D.C. Cook, Units 1 and 2 RHR, Accumulator, and Safety Injection Lines Supporting Expanded Scope Leak-Before-Break. ML18274A0952018-09-30030 September 2018 WCAP-18394-NP, Revision 1, Fatigue Crack Growth Evaluations of D. C. Cook Units 1 and 2 RHR, Accumulator, and Safety Injection Lines Supporting Expanded Scope Leak-Before-Break, September 2018 (Non-Proprietary) AEP-NRC-2018-36, Notification of Initial Renewable Operating Permit2018-05-0909 May 2018 Notification of Initial Renewable Operating Permit AEP-NRC-2018-21, 30-Day Report of Changes to or Errors in an Evaluation Model2018-05-0404 May 2018 30-Day Report of Changes to or Errors in an Evaluation Model ML18026A8822018-02-0505 February 2018 Staff Assessment of Flooding Focused Evaluation ML18334A2692018-01-31031 January 2018 WCAP-18302-NP, Revision 0, Technical Justification for Eliminating Residual Heat Removal Line Rupture as the Structural Design Basis for D.C. Cook Units 1 and 2, Using Leak-Before-Break Methodology. ML18334A2682018-01-31031 January 2018 WCAP-18295-NP, Revision 0, Technical Justification for Eliminating Accumulator Line Rupture as the Structural Design Basis for D.C. Cook Units 1 and 2, Using Leak-Before-Break Methodology (Non-Proprietary) ML18334A2702018-01-31031 January 2018 WCAP-18309-NP, Revision 0, Technical Justification for Eliminating Safety Injection Line Rupture as the Structural Design Basis for D.C. Cook, Units 1 and 2, Using Leak-Before-Break Methodology. ML17151A9672017-06-14014 June 2017 Flood Hazard Mitigation Strategies Assessment ML16313A1172016-10-10010 October 2016 1BTl1V001-RPT-01, Donald C. Cook Focused Scope Peer Review - Pre-Initiator Human Reliability Analysis. ML16127A3352016-05-0606 May 2016 Reactor Oversight Process Task Force FAQ Log-April 13, 2016 ML16113A1982016-04-20020 April 2016 Precursor Screening Analysis- Reject ML16169A1182016-03-31031 March 2016 RWA-1313-015, Rev. 1, AST Radiological Analysis Technical Report. ML15308A0932015-10-15015 October 2015 Pressurized Water Reactor Owners Group (Pwrog), 15066-NP, Revision 1, Responses to Follow-Up NRC RAI 2 on the D.C. Cook, Units 1 and 2, Reactor Internals Aging Management Program. AEP-NRC-2015-83, Revision 1 of Final Integrated Plan Regarding March 12, 2012, NRC Order Regarding Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2015-10-0101 October 2015 Revision 1 of Final Integrated Plan Regarding March 12, 2012, NRC Order Regarding Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049) ML15233A0242015-08-19019 August 2015 Transmittal of Annual Report of Loss-of-Coolant Accident Evaluation Model Changes ML14253A3172014-09-0404 September 2014 Enclosure 2: I&M CAP Document AR 2010-1804-10, Root Cause Evaluation Attachment, Rx Vessel Core Support Lug Bolting Anomalies ML14147A3292014-06-18018 June 2014 Staff Assessment of the Flooding Walkdown Report Supporting Implementation of Near-Term Task Force Recommendation 2.3 Related to the Fukushima Dai-ichi Nuclear Power Plant Accident ML14181A5382014-06-0505 June 2014 Enclosure 5 to AEP-NRC-2014-42, Attachment #2 (NP-Attachment) of Westinghouse Letter, LTR-PL-14-22, Westinghouse Responses to NRC, Request for Additional Information on the Application for Amendment to Restore.. ML14073A7592014-03-31031 March 2014 Staff Assessment of the Seismic Walkdown Report Supporting Implementation of Near-Term Task Force Recommendation 2.3 Related to the Fukushima Dai-Ichi Nuclear Power Plant Accident ML14092A3302014-03-17017 March 2014 Document No. 13Q3208-RPT-003, Revion 1, Seismic Hazard and Screening Report for the Cook Nuclear Plant (Cnp), Enclosure 2 to AEP-NRC-2014-25 AEP-NRC-2014-15, 30 Day Report of Changes to or Errors in an Evaluation Model2014-02-27027 February 2014 30 Day Report of Changes to or Errors in an Evaluation Model ML13337A3252014-01-24024 January 2014 Interim Staff Evaluation and Audit Report Relating to Overall Integrated Plan in Response to Order EA-12-049 (Mitigation Strategies) AEP-NRC-2014-08, SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-322 Through Page D-4042014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-322 Through Page D-404 ML14035A3642014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-1 Through Page D-91 ML14035A3682014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-241 Through Page D-321 ML14035A3672014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-170 Through Page D-240 ML14035A3662014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-92 Through Page D-169 ML14035A3522014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Cover Through Page B-312 ML14035A3532014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-1 Through Page C-114 ML14035A3552014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-405 Through End ML14035A3562014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-115 Through Page C-231 ML14035A3572014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-232 Through Page C-353 2024-07-25
[Table view] Category:Technical
MONTHYEARAEP-NRC-2022-66, Report Per Technical Specification 5.6.6 for Inoperability of Unit 2 Post Accident Monitoring Neutron Flux Monitoring2022-12-15015 December 2022 Report Per Technical Specification 5.6.6 for Inoperability of Unit 2 Post Accident Monitoring Neutron Flux Monitoring ML22340A2132022-11-30030 November 2022 R1900-0024-001, Revision 13, NFPA 805 Nuclear Safety Capability Assessment ML22340A1992022-11-30030 November 2022 Report of Changes, Tests, Experiments Pursuant to 10 CFR 50.59(d)(2) ML22340A1762022-11-30030 November 2022 Commitment Change Summary October 2020 to May 2022 AEP-NRC-2022-58, U1C31 Steam Generator Tube Inspection Report2022-10-24024 October 2022 U1C31 Steam Generator Tube Inspection Report AEP-NRC-2021-07, Supplement to Report Per Technical Specification 5.6.6, Lnoperability of Unit 1, Post Accident Monitoring, Containment Water Level2021-01-28028 January 2021 Supplement to Report Per Technical Specification 5.6.6, Lnoperability of Unit 1, Post Accident Monitoring, Containment Water Level AEP-NRC-2020-23, Request for Use of Encoded Phased Array Ultrasonic Examination Techniques in Lieu of Radiography2020-04-30030 April 2020 Request for Use of Encoded Phased Array Ultrasonic Examination Techniques in Lieu of Radiography ML20108E9992020-03-0505 March 2020 Enclosure 7 - LTR-SCS-19-50, Revision 0, D.C. Cook Unit 1 Low Temperature Overpressure Protection System (Ltops) Analysis for 48 EFPY, Dated March 5, 2020, Attachment 2 Only (Non-Proprietary) ML20108F0002020-02-28028 February 2020 Enclosure 5 - WCAP-18455-NP, Revision 1, D.C. Cook Unit 1 Heatup and Cooldown Limit Curves for Normal Operation, Westinghouse Electric Company, February 2020. (Non-Proprietary) ML18334A2712018-09-30030 September 2018 WCAP-18394-NP, Revision 1, Fatigue Crack Growth Evaluations of D.C. Cook, Units 1 and 2 RHR, Accumulator, and Safety Injection Lines Supporting Expanded Scope Leak-Before-Break. ML18274A0952018-09-30030 September 2018 WCAP-18394-NP, Revision 1, Fatigue Crack Growth Evaluations of D. C. Cook Units 1 and 2 RHR, Accumulator, and Safety Injection Lines Supporting Expanded Scope Leak-Before-Break, September 2018 (Non-Proprietary) ML18334A2692018-01-31031 January 2018 WCAP-18302-NP, Revision 0, Technical Justification for Eliminating Residual Heat Removal Line Rupture as the Structural Design Basis for D.C. Cook Units 1 and 2, Using Leak-Before-Break Methodology. ML18334A2682018-01-31031 January 2018 WCAP-18295-NP, Revision 0, Technical Justification for Eliminating Accumulator Line Rupture as the Structural Design Basis for D.C. Cook Units 1 and 2, Using Leak-Before-Break Methodology (Non-Proprietary) ML18334A2702018-01-31031 January 2018 WCAP-18309-NP, Revision 0, Technical Justification for Eliminating Safety Injection Line Rupture as the Structural Design Basis for D.C. Cook, Units 1 and 2, Using Leak-Before-Break Methodology. ML16313A1172016-10-10010 October 2016 1BTl1V001-RPT-01, Donald C. Cook Focused Scope Peer Review - Pre-Initiator Human Reliability Analysis. ML16169A1182016-03-31031 March 2016 RWA-1313-015, Rev. 1, AST Radiological Analysis Technical Report. ML15308A0932015-10-15015 October 2015 Pressurized Water Reactor Owners Group (Pwrog), 15066-NP, Revision 1, Responses to Follow-Up NRC RAI 2 on the D.C. Cook, Units 1 and 2, Reactor Internals Aging Management Program. ML14253A3172014-09-0404 September 2014 Enclosure 2: I&M CAP Document AR 2010-1804-10, Root Cause Evaluation Attachment, Rx Vessel Core Support Lug Bolting Anomalies ML14147A3292014-06-18018 June 2014 Staff Assessment of the Flooding Walkdown Report Supporting Implementation of Near-Term Task Force Recommendation 2.3 Related to the Fukushima Dai-ichi Nuclear Power Plant Accident ML14092A3302014-03-17017 March 2014 Document No. 13Q3208-RPT-003, Revion 1, Seismic Hazard and Screening Report for the Cook Nuclear Plant (Cnp), Enclosure 2 to AEP-NRC-2014-25 ML13337A3252014-01-24024 January 2014 Interim Staff Evaluation and Audit Report Relating to Overall Integrated Plan in Response to Order EA-12-049 (Mitigation Strategies) ML14035A3642014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-1 Through Page D-91 AEP-NRC-2014-08, SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-322 Through Page D-4042014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-322 Through Page D-404 ML14035A3682014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-241 Through Page D-321 ML14035A3672014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-170 Through Page D-240 ML14035A3522014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Cover Through Page B-312 ML14035A3532014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-1 Through Page C-114 ML14035A3662014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-92 Through Page D-169 ML14035A3632014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-845 Through Page C-962 ML14035A3622014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-723 Through Page C-844 ML14035A3612014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-584 Through Page C-722 ML14035A3552014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page D-405 Through End ML14035A3602014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-469 Through Page C-583 ML14035A3592014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-354 Through Page C-468 ML14035A3572014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-232 Through Page C-353 ML14035A3562014-01-13013 January 2014 SD-121023-001, Rev. 2, in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic for the D. C. Cook Unit 1 and 2, Page C-115 Through Page C-231 ML13357A3252014-01-10010 January 2014 Mega-Tech Services, LLC, Technical Evaluation Report Regarding the Overall Integrated Plan for Donald C. Cook Nuclear Plant, Units 1 and 2, TAC Nos.: MF0766 and MF0767 ML14253A3182013-12-31031 December 2013 Enclosure 3: Babcock & Wilcox Report, S-1473-002, Revision 0, Examination of Clevis Bolts Removed from D. C. Cook Nuclear Plant. Part 1 of 3 AEP-NRC-2014-59, Enclosure 3: Babcock & Wilcox Report, S-1473-002, Revision 0, Examination of Clevis Bolts Removed from D. C. Cook Nuclear Plant. Part 3 of 32013-12-31031 December 2013 Enclosure 3: Babcock & Wilcox Report, S-1473-002, Revision 0, Examination of Clevis Bolts Removed from D. C. Cook Nuclear Plant. Part 3 of 3 ML14253A3192013-12-31031 December 2013 Enclosure 3: Babcock & Wilcox Report, S-1473-002, Revision 0, Examination of Clevis Bolts Removed from D. C. Cook Nuclear Plant. Part 2 of 3 ML13267A3272013-09-12012 September 2013 SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Page D-1 Through Page D-48 AEP-NRC-2013-07, SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Page D-405 Through End2013-09-12012 September 2013 SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Page D-405 Through End ML13267A3352013-09-12012 September 2013 SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Page D-339 Through Page D-404 ML13267A3342013-09-12012 September 2013 SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Page D-271 Through Page D-338 ML13267A3322013-09-12012 September 2013 SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Page D-221 Through Page D-270 ML13267A3292013-09-12012 September 2013 SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Page D-115 Through Page D-160 ML13267A3282013-09-12012 September 2013 SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Page D-49 Through Page D-114 ML13267A3252013-09-12012 September 2013 SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Page C-801 Through Page C-884 ML13267A3162013-09-12012 September 2013 SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Cover Through Page B-312 ML13267A3172013-09-12012 September 2013 SD-121023-001, Rev. 1, Seismic Walkdown Report in Response to the 50.54(f) Information Request Regarding Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Page C-1 Through Page C-98 2022-12-15
[Table view] Category:Response to Request for Additional Information (RAI)
MONTHYEARML24197A1262024-07-15015 July 2024 Unit 2 - Request for Additional Information (RAI) for License Amendment Request for One-Time Extension of Completion Time for Inoperable AC Source - Operating AEP-NRC-2024-48, Response to Request for Additional Information (RAI) for License Amendment Request for One-Time Extension of Completion Time for Inoperable AC Source - Operating2024-07-0202 July 2024 Response to Request for Additional Information (RAI) for License Amendment Request for One-Time Extension of Completion Time for Inoperable AC Source - Operating AEP-NRC-2022-03, Final Supplemental Response to NRC Generic Letter 2004-022022-01-20020 January 2022 Final Supplemental Response to NRC Generic Letter 2004-02 AEP-NRC-2021-68, Response to Request for Additional Information on Requested Change Regarding Containment Water Level Instrumentation2021-12-16016 December 2021 Response to Request for Additional Information on Requested Change Regarding Containment Water Level Instrumentation AEP-NRC-2021-43, Response to Request for Additional Information Regarding Relief Request for Limited Coverage Examinations Performed in the Fourth 10-Year Inspection Interval2021-07-21021 July 2021 Response to Request for Additional Information Regarding Relief Request for Limited Coverage Examinations Performed in the Fourth 10-Year Inspection Interval AEP-NRC-2021-16, Unit 2 - Response to Request for Additional Information Regarding CFR 50.55a Request Associated with the Fifth Ten-Year Inservice Testing Interval2021-02-25025 February 2021 Unit 2 - Response to Request for Additional Information Regarding CFR 50.55a Request Associated with the Fifth Ten-Year Inservice Testing Interval AEP-NRC-2021-18, Response to Request for Additional Information Regarding License Amendment Request for One-Time Extension of the Containment Type a Leak Rate Testing Frequency2021-02-18018 February 2021 Response to Request for Additional Information Regarding License Amendment Request for One-Time Extension of the Containment Type a Leak Rate Testing Frequency AEP-NRC-2020-50, Response to Request for Additional Information Regarding License Amendment Request for One-Time Extension of the Containment Type a Leak Rate Testing Frequency2020-07-0909 July 2020 Response to Request for Additional Information Regarding License Amendment Request for One-Time Extension of the Containment Type a Leak Rate Testing Frequency AEP-NRC-2019-56, Seismic Probabilistic Risk Assessment in Response to Near Term Task Force Recommendation 2.1: Seismic2019-11-0404 November 2019 Seismic Probabilistic Risk Assessment in Response to Near Term Task Force Recommendation 2.1: Seismic AEP-NRC-2019-32, Unit 2 - Response to Request for Additional Information Regarding Unit 2 Leak-Before-Break Analysis and Deletion of Containment Humidity Monitors for Unit 1 and Unit 22019-08-22022 August 2019 Unit 2 - Response to Request for Additional Information Regarding Unit 2 Leak-Before-Break Analysis and Deletion of Containment Humidity Monitors for Unit 1 and Unit 2 AEP-NRC-2019-40, Response to Request for Additional Information Regarding License Amendment Request to Address NSAL-15-1, Rev. 02019-07-30030 July 2019 Response to Request for Additional Information Regarding License Amendment Request to Address NSAL-15-1, Rev. 0 AEP-NRC-2018-81, Supplement to Response to Request for Additional Information Regarding License Amendment Request for Approval of Application of Proprietary Leak-Before-Break Methodology for Reactor Coolant System Small Diameter Piping2018-11-27027 November 2018 Supplement to Response to Request for Additional Information Regarding License Amendment Request for Approval of Application of Proprietary Leak-Before-Break Methodology for Reactor Coolant System Small Diameter Piping AEP-NRC-2018-82, Response to Request for Additional Information Regarding the Alternative Request for Elimination of the Reactor Pressure Vessel Threads in Flange Examination2018-11-20020 November 2018 Response to Request for Additional Information Regarding the Alternative Request for Elimination of the Reactor Pressure Vessel Threads in Flange Examination AEP-NRC-2018-64, Response to Request for Additional Information Regarding License Amendment Request for Approval of Application of Proprietary Leak-Before-Break Methodology for Reactor Coolant System Small Diameter Piping2018-09-27027 September 2018 Response to Request for Additional Information Regarding License Amendment Request for Approval of Application of Proprietary Leak-Before-Break Methodology for Reactor Coolant System Small Diameter Piping ML18334A2722018-09-18018 September 2018 LTR-SDA-II-18-41-NP, Revision 1, Responses to NRC Questions on the Expanded Scope Leak-Before-Break Evaluations for D.C. Cook, Units 1 and 2. AEP-NRC-2018-45, Response to Request for Additional Information Concerning 2017 Decommissioning Funding Status Report2018-08-0909 August 2018 Response to Request for Additional Information Concerning 2017 Decommissioning Funding Status Report AEP-NRC-2018-01, Response to Request for Additional Information Regarding Generic Letter 2016-012018-05-25025 May 2018 Response to Request for Additional Information Regarding Generic Letter 2016-01 AEP-NRC-2018-23, Response to Request for Additional Information Regarding Independent Spent Fuel Storage Installation Decommissioning Funding Plan2018-04-11011 April 2018 Response to Request for Additional Information Regarding Independent Spent Fuel Storage Installation Decommissioning Funding Plan ML18092A0842018-03-28028 March 2018 Donald C. Cook Nuclear Plant Unit 2, Response to Request for Additional Information Regarding Supplemental Information Regarding the Reactor Vessel Internals Aging Management Program ML17346A7662017-12-0808 December 2017 Enclosures 2 & 3 to AEP-NRC-2017-56 - Response to Request for Additional Information Regarding the License Amendment Request to Revise Emergency Action Levels and EAL Technical Basis Manual AEP-NRC-2017-56, Response to Request for Additional Information Regarding the License Amendment Request to Revise Emergency Action Levels2017-12-0808 December 2017 Response to Request for Additional Information Regarding the License Amendment Request to Revise Emergency Action Levels AEP-NRC-2017-30, Response to Request for Additional Information Regarding the License Amendment Request to Revise Technical Specification 3.9.3, Containment Penetrations2017-05-26026 May 2017 Response to Request for Additional Information Regarding the License Amendment Request to Revise Technical Specification 3.9.3, Containment Penetrations AEP-NRC-2017-16, Submittal of Focused Evaluation in Response to March 12, 2012, Request for Information Regarding Near- Term Task Force Recommendation 2.1: Flooding2017-05-11011 May 2017 Submittal of Focused Evaluation in Response to March 12, 2012, Request for Information Regarding Near- Term Task Force Recommendation 2.1: Flooding AEP-NRC-2017-09, Response to Request for Additional Information Regarding the License Amendment Request for the Containment Leakage Rate Testing Program2017-02-27027 February 2017 Response to Request for Additional Information Regarding the License Amendment Request for the Containment Leakage Rate Testing Program AEP-NRC-2016-81, Unit 2 - Supplemental Response to Request for Additional Information Regarding the License Amendment Request to Adopt TSTP-425, Relocate Surveillance Frequencies Program to Licensee Control-Risk Informed ...2016-11-0303 November 2016 Unit 2 - Supplemental Response to Request for Additional Information Regarding the License Amendment Request to Adopt TSTP-425, Relocate Surveillance Frequencies Program to Licensee Control-Risk Informed ... AEP-NRC-2016-80, Response to NRC Generic Letter 2016-01: Monitoring of Neutron-Absorbing Materials in Spent Fuel Pools2016-10-31031 October 2016 Response to NRC Generic Letter 2016-01: Monitoring of Neutron-Absorbing Materials in Spent Fuel Pools AEP-NRC-2016-79, Spent Fuel Pool Evaluation Supplemental Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from Fukushima Dai-ichi Accident2016-10-12012 October 2016 Spent Fuel Pool Evaluation Supplemental Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from Fukushima Dai-ichi Accident AEP-NRC-2016-69, Follow-up Response to Request for Additional Information Regarding License Amendment Request to Adopt TSTF-425, Relocate Surveillance Frequencies Program to License Control-Risk Informed Technical Specification Task Force.2016-09-0909 September 2016 Follow-up Response to Request for Additional Information Regarding License Amendment Request to Adopt TSTF-425, Relocate Surveillance Frequencies Program to License Control-Risk Informed Technical Specification Task Force. AEP-NRC-2016-56, Response to Seventh Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term2016-07-12012 July 2016 Response to Seventh Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term AEP-NRC-2016-48, Unit 2 - Response to Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-425, Relocate Surveillance Frequencies Program to Licensee-Control...2016-06-16016 June 2016 Unit 2 - Response to Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-425, Relocate Surveillance Frequencies Program to Licensee-Control... AEP-NRC-2016-54, Response to Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-425, Relocate Surveillance Frequencies to Licensee Control - Risk Informed Technical Specification Task Force Initiative 582016-06-16016 June 2016 Response to Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-425, Relocate Surveillance Frequencies to Licensee Control - Risk Informed Technical Specification Task Force Initiative 58 ML16169A1152016-05-0606 May 2016 Donald C. Cook Nuclear Plant Units 1 and 2 - Response to Sixth Request for Additional Information the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term AEP-NRC-2016-24, Response to Fifth Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term2016-02-19019 February 2016 Response to Fifth Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term AEP-NRC-2016-14, Response to Request for Additional Information Regarding the License Amendment Request to Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation2016-01-21021 January 2016 Response to Request for Additional Information Regarding the License Amendment Request to Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation AEP-NRC-2015-11, Response (Part 2) to Fourth Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term2015-12-17017 December 2015 Response (Part 2) to Fourth Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term ML15323A4342015-11-16016 November 2015 Response (Part 1) to Fourth Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term ML15323A4332015-11-16016 November 2015 Supplemental Response to Request for Additional Information on the Application for Amendment to Restore Normal Reactor Coolant System Pressure and Temperature Consistent with Previously Licensed Conditions. AEP-NRC-2015-98, Supplemental Response to Follow-Up Request for Additional Information Concerning the Reactor Vessel Internals Aging Management Program2015-10-30030 October 2015 Supplemental Response to Follow-Up Request for Additional Information Concerning the Reactor Vessel Internals Aging Management Program AEP-NRC-2015-99, Response to Request for Additional Information Re License Amendment Request to Revise Technical Specification Section 3.8.1, AC Sources - Operating, Surveillance Requirements 3.8.1.10, 3.8.1.11 and 3.8.1.152015-10-30030 October 2015 Response to Request for Additional Information Re License Amendment Request to Revise Technical Specification Section 3.8.1, AC Sources - Operating, Surveillance Requirements 3.8.1.10, 3.8.1.11 and 3.8.1.15 ML15308A0932015-10-15015 October 2015 Pressurized Water Reactor Owners Group (Pwrog), 15066-NP, Revision 1, Responses to Follow-Up NRC RAI 2 on the D.C. Cook, Units 1 and 2, Reactor Internals Aging Management Program. AEP-NRC-2015-86, Supplemental Response to Request for Additional Information on the Application for Amendment to Restore Normal Reactor Coolant System Pressure and Temperature Consistent With. Previously Licensed Conditions.2015-09-18018 September 2015 Supplemental Response to Request for Additional Information on the Application for Amendment to Restore Normal Reactor Coolant System Pressure and Temperature Consistent With. Previously Licensed Conditions. AEP-NRC-2015-80, Response to Third Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term2015-08-28028 August 2015 Response to Third Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term AEP-NRC-2015-75, Response to Second Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term2015-08-24024 August 2015 Response to Second Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term AEP-NRC-2015-88, Response to Request for Additional Information Regarding Proposed Alternative to the American Society of Mechanical Engineers Code, Section XI Repair Requirements2015-08-24024 August 2015 Response to Request for Additional Information Regarding Proposed Alternative to the American Society of Mechanical Engineers Code, Section XI Repair Requirements AEP-NRC-2015-69, Response to Follow-Up Request for Additional Information Concerning the Reactor Vessel Internals Aging Management Program2015-08-0606 August 2015 Response to Follow-Up Request for Additional Information Concerning the Reactor Vessel Internals Aging Management Program ML15223A4362015-07-28028 July 2015 PWROG-15066-NP, Revision 0, Responses to Follow-Up NRC RAI 2 on the DC Cook Units 1 and 2 Reactor Internals Aging Management Program. AEP-NRC-2015-63, Response to Request for Additional Information Regarding 2014 Unit 1 Steam Generator Tube Inspection2015-07-17017 July 2015 Response to Request for Additional Information Regarding 2014 Unit 1 Steam Generator Tube Inspection AEP-NRC-2015-64, Response to Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term2015-07-17017 July 2015 Response to Request for Additional Information Regarding the License Amendment Request to Adopt TSTF-490 and Implement Alternative Source Term AEP-NRC-2015-60, Response to a Request for Additional Information Regarding the License Amendment Request to Revise Technical Specification Section 3.8.1, AC Sources - Operating, Surveillance Requirements 3.8.1.10, 3.8.1.11, and 3.8.1.152015-07-0909 July 2015 Response to a Request for Additional Information Regarding the License Amendment Request to Revise Technical Specification Section 3.8.1, AC Sources - Operating, Surveillance Requirements 3.8.1.10, 3.8.1.11, and 3.8.1.15 AEP-NRC-2015-66, Response to Request for Additional Information Regarding Exigent License Amendment Request Regarding Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation2015-07-0202 July 2015 Response to Request for Additional Information Regarding Exigent License Amendment Request Regarding Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation 2024-07-02
[Table view] |
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'I J IO .'GA'PART 5r} DOC."ET fi,1ATERIAL CONTROL NQ FlLE':ROiyi Indiana & Michigan Pwr c DATE'OF DOC DATE REC'D TM!X APT 'QTf<'ER
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Mr Kniel ORIG one signed CC OTHER ii i 'iii'SENT LOCAL PDR CLASS UNC LASS PROP. INFO . INP.UT NO CYS REC'D DOCKET NO:
. DESCR IP flOii!: ENCLOSURES:
Ltr re our 3-14-75 ltr':...trans tie'.following: Responses to Qu'estions. concer'ning boron precipitation following LOCA..
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INDIANA II MICHIGAN POWER COMPANY P. O. BOX 18 BOWLING GREEN STATION NEW YORK, N. Y. 10004 April 14) 1975 Docket No. 50-315 and 50-316 CPPR No. 61, DPR No. 58 pock,'g Ep
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],qgt5 4Ip ~/Pgg .p Mr. Karl Kniel, Chief Pressurized Mater Reactors Branch No. 2 Directorate of Licensing U.S. Nuclear Regulatory Commissa!5n Nashington, D.C. 20555
Dear Mr. Kniel:
In response to your letter dated March 14, 1975, the system capabilities and operating procedures with regard to boron precipitation following a postulated loss-of-coolant accident (LOCA) have been evaluated for the Donald C- Cook Nuclear Plant, Units 1 and 2. The results of this evaluation are discussed below.
The operating .procedures for the Donald C. Cook Nuclear Plant require switchover of the emergency core cooling system (ECCS) from Reactor Coolant System cold leg to hot leg injection 21+ hours after the accident. This procedure will preclude the possibility of exceeding boron solubility limits as is shown in the attached analysis.
This analysis was also transmitted to Mr. T. M. Novak of the NRC staff in a letter from C. L. Caso of the Nestinghouse Electric Corporation designated, in CLC-NS-409 and, dated April 1, 1975. Also enclosed is a copy of the Donald C. Cook Nuclear Plant operating procedure 0HP 4022.008.002 titled "Initiation of ECC Recirculation Phase" which is the operating procedure calling for switchover from cold leg to hot leg injection.
lIItith regard to system capability, redundancy in equipment is provided. in both the high head and low head systems for hot leg recirculation. Each safety injection pump and low head (RHR) pump share a header which injects into two cold, or two hot legs. The switch-over from cold to hot leg injection is accomplished. by
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Mr- Karl Kniel April 14, 1975 closing the cold leg motor operated valve, and opening the hot leg motor operated valve. Thus with the worst single failure at least one high head and one low head pump are available for hot leg recirculation. This system is described in the Donald, C. Cook Nuclear Plant Final Safety Analysis Report, Section 6 and Appendix I.
There is a question on the environmental effects on the motor drives for the valves which to transfer from cold to hot leg injection which we are'sed are in the process of resolving. We are currently investigating this and will notify the Commission of our findings as soon as our investigation is completed.
Very truly yours, J i ghast Vice President JT:ma cc: Gerald Charnoff, Esq.
Richard Walsh, Esq.
Robert J. Vollen, Esq.
Robert C. Callen, Esq.
Peter W. Steketee, Esq.
R. S. Hunter R. W. Jurgensen - Bridgman
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, ATTACHMENT TO REM-62811
!Yet house El.ctric Corporation Povser Systems P VS Systems ONtstatt Box355 Pittsburt,hPernsyttrerz 15230 April 1, 1975 t
CLC-NS-309 Hr. T. H. Novak Chief, Reactor Systems Branch U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Haryland, 20014,
Dear Hr.'ovak:
As we have discussed, enclosed is a discussion of some phenomena concerning the long tern build up of boric acid in the core region following a postulated LOCA. This discussion is a generic document covering l!estingttouse 2, 3 and 4 loop plants.
The discussion re-emphasizes the adequacy of'he current
>lestinghouse ECCS desion concept in addressing long term core coolina neer!c.
Yery truly yours, C. L. Caso, Hanag r Safeguards Engineering
'LC:jmb Enclosure
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LO;]r, TEP;.. CORE COOi I>>C BORG!~ CO>>SInLvavInwS It<TRODUCTIGh Immediately after a hypothetical loss of coolant accident, OCA, the safety I
injection system is supplied with borated water from the Refueling 'l1ater Storage Tank (R!"ST) and delivers to ihe reactor coolant system cold legs.
When the low level signal from the RilST occurs, at approximately 20 minutes after the accident, the safety injection system is realigned to draw water from the containment sump. The safety injection system delivers to the cold I
legs of the reac or coolant system until 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after the acc'.dent. This is commonly referred to as sump recirculation phase. At 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> the sa et.
injection system is realigned to deliver to the RCS hot legs. This is cors-only referred to as the hot-leg recirculation phase.
J. COLD LEG BREA~i' Basic'Phenomena Calculations were performed to determine the concentration of boric acid in t.ie core region at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, following a cold leg brea.'.
For this analysis, both the core water volume and the water volu:-.e in the upper plenum, but below the lower lip of the hot leg nozzle were consider d.
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Figure 1 presents solubility data for boric acid. Table I summariz s the results for typical 2, 3 and 4 loop plants. The calculations w re r
done assuming license core power and AHS finite decay heat.
It can b seen that th se conservative calculations are close to 'h solubility 1:rats for boric acid of 212'F. S veral approximati"ns in these calculations can be identified.
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'A. Basic Phenomena Table I shows the effect of maximizing-the steam boiloff rate (and consequently the boron build up rate) by assuming that the injected ECC water is at saturation temperature. This assumption ignores the heat capacity of the subcooled injection water,. Table I also shows the effect on the-weight percent boric acid at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> assuming that the injected water is subcooled by 80 Bt.u/ibm (H = 116 Btu/ibm). As another conservatism, the volatility of boric aci d 1
into steam is ignored. Although the distribution coefficient of boric acid between the vapor and liquid. phases is'small, the integrated effect would be appreciable, due to the large mass of vapor generated. For example, if it is conservatively assumed that the boric acid concentration is uniform at 10';l of the initial 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and a distribution coefficient, 0, of 0.005 is used, it can be calculated that 1500 lb of boric acid..would be volatilized 1
in the typical 4 loop case. This, in turn,"would lead to!a reduction of the boric acid in. the core from 27;2;l to 25.1ll at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. hore realistic calcu-lations including temperature dep ndent D-values and time history core boric acid concentrations would. be expected to increase this margin. This assumption of not including'he volans~ lity, tends to maximize the boric .acid build up rate.
Ano her conservatism in these calculations is based on the. specific gravity of bo.ic acid solutions. As tne concentra'ion of H3803 -increases t>>e sp ci i" glavity increases. Since the solution in the lower plenum is more dilu e than that. in the core,'the heavier core solution would tend to migrate to the lower plenum. This would effectively increase the water volume available for the concentration of H3B03.
A 'ore realistic assumption to be considered is to include the effects of voids in the core region. These voids redu'ce the mass of water in the core region, even though the total amount of water above the lower core plate remains essentially the same in such a way that the elevation head in the core region equals the elevation head in the downcomer. If the mas's in the core only is considered a smaller mass of boric acid would be n cessary to bring this mass o water- to ihe solubility limit.
In order to assess som effects of the above considerations, it was decided to perform calculations including the voids in the core and the specific gravity.
The results are discussed in the following section.
TABLE I 2 Loop 3 Loop .:.'4 Loop t<SSS Porkier (h".It) 1650 2785 '425 l1 6
Total Sump 2.5 x 10 3.3 x 10 6 31 6x10 6 Inventory (ibm)
I T.nitial ppm 2000 2000 '2000 I
Boron in System Effective
~Vessel Volume (ft )
590 854 1154 Height Percent Boric Acid in 27.8 30.6 27.2 e
';esse: at <> er concentrat>on of boron than that sn the core, under isothermal conditions, the fluid in tne core would migrate to the lower plenum.
However, if it is assumed that the lower plenum is at a lower tempera-ture than the core, it becomes necessary to establish the point at which I
I temperature effects on density are balanced by the concentration effects.
For example, if it I is assumed that the core is at 212'nd the lo<<!er I
plenum is at. 130', the difference in specific gravity is 0.9581 - 0.9860 =
0.0279. From Figure 2, it can be seen that a difference in concentration of 8.5~~ will balance that effect. The boric acid concentration in the
'ower plenum is at a'aximum of 1.144 '<it/. Boric Acid initially Boron if of 2000 ppm concentration (equal to that used in the RMST) is assumed to exist pt thrp initialization nf the boric arid concentration ralcul a. ion This <<!ould require approximately an upperbound of 9.6 hid~ Boric Acid concentration in the core to initiate migration to the lower plenum.
In this calculation, the aT was conservatively maximized. The mixture flowing to the lower plenum>>ill not precipitate boron since concentra-tion g 130 F = 11.5/ > 9.6i.. Thus mixing starts before precipitat'ion threshold. i~
Hence, in the worst case, when the concentration in the core exceeds the concentration in the lower plenum by 8.5'.l, down<<!ard migration would l:33 sho<<! that at low pressures the critical b expected. The Davis curves steam velocity for carry-over is about 10 ft/sec. After about 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> the average steam velocities in the core are less than 10 ft/sec and therefore the migration of fluid to the lower plenum is not prevented Furthermore, a continuous supply of water to the core is insured due to .
the available driving force of a full downcomer. One of the effects of this migration <<!ould be to increase the temperature of the lo<<!er
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plenum. A natura') circulation pattern Mould be established vihich will result in subsequent dilution of boric acid in the lower plenum. In sugary, vihen the volume of the lower plenum is included in the inventory available for storage of the concentrated boron solution, th results shoe.n in Table 2 are obtained. These results do not consider boron- volatility vihich viill redistribute boron in all ]he water mass above the core thus further reducing t)>e boron concentration. ))
"'TABLE 2 p arameters used to Calculate Boric Acid Concentration in Vessel at 24 Hours NSSS Power (tb]t) .1650 2785 3425 Total Inventory 2.5 x 10 6 ibm 3.3 x 10 6 ibm 3.6 x 10 ibm ln
'000 Sump Initial ppm B 2000 2000 in System Effective* 819.0 ft 1284.0 ft 1637.7 ft Vessel Volume Containment 20.0 20.0 20.0 D~craevn
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The above analyses were perform d assuming c = 0,3 in the core and mlxlng with the lever plenum volume. ' void fraction in the core of 30,'l was used as it corresponds to the void fraction in the core at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
The boric acid concentration in the core at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> depends on the void fraction at that time. Varying the void fraction in the core during the transient has little effect on the calculation of the boric acid concentra-tion at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The reduction of void fraction in the core caused by a reduction in decay heat results in an increase of water mass in the core.
Tflis additional water mass dilutes boron since it is supplied by sump, I
downcomer, and lower plenum liquid which has a lower boric acid concentra-tion.
Clearly, these results show considerable margin to the solubility limits at 212'F.
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II. HOT LEG BREAK iE
. For the large break LOCA in the.RCS hot leg, the safe+y injection flo~ delivered to the RCS cold legs during the first 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> will flow through the cove and spill to the containment sumo via the 1 broken hot leg. This flow will facilitate sub-cooling,'of the core at the time when decay heat energy addition can be matched by th safety injection water. The time at which the core becomes sub-cooled depends on safety injection flow vates, the containment pressure transient, core stored and metal heat energy dissipation, and the decay heat energy.
Mter the safety injection system is realigned at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to deliver to the RCS hot legs, the cold safety in'ection flow enters the core and .will absorb decay heat energy.* The safety injection flow rates into the core needed to keep the cove below saturated conditions ave given in Table 3. The;"1 es presented are based on a the)modyncmic eoul-Ma 'Iu'0 cuscu eat co< at I's / sl a anQ an i&ay, neat oxchan" r ou' !"
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temperature of 130 F. The amount of water needed to keep the core belo I saturated conditions depends on the decay h at eneroy addition, containment pressure, and the temperature of the safe.y injection water drawn from the sump and passed through the Residual Heat Removal (RHR) heat exchangers.
- Decay heat energy addition at 24 nours for the 2, 3, and 4 loop plan+s
( is given in Table 2.'
For a'hot leg break, there would be no excessive boric acid concentra-tion buildup in the core for the first 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> due to the direct flow I path going from the cold leg inject on point, directly through the ~
1 core, and oui the break. After switchover to hot leg recirculation 1 at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, there would be no si'gnificn-t buildup of,boric acid in the core since the hot leg injection will condense or prevent boiloff froii. core. 'Jhether boiloff will re-occur 9 24Ihours depends, on the Safety Injection System-flow delivery capability of each specific plant.
For a plant d sig>> where the safety injection flow rate at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is not adequate to keep the core below saturated conditions, it is necessary to determine the time at which the decay heat energy addition will decrease to a level that matches safety injection capabHities.
Table 4 gives the decay heat energy addition and safety injection flo::irate neecad to keep the core below satu. ated conditions at various times. Then it is necessary to determine the increase of boric acid coricentration in the core due to decay heat mass boiloff after 2. I ou-. s. However, it should be noted that because of the reduction in Decay heat with time and the absorption of the decay heat by the sensible heat of the injected water negligible or no boil-off will result in this phase.
After the switchover to hot leg recirculation, flow patterns are established iri the core, primarily to the density differences between the injected :;ater and the heated water leaving the core. Calculations of these circulation flows in the core are presently underway, arid
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TABLE 3 2 Loop 3 Loop 4 Loop Core Power (Hilt) 1650 2786 3425 Safety Injection 98 Entha3py {Btu/ibm)
Sensible Heat 82 82 (hs <-h'.n.) (Btu/lb'>)
Decay Heat Energy 8600 14520 17850 Addition at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (Btu/sec)
Safety Injection 106 178 218 Cl VI
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2xl0 sec 5,'xl0 4xl0 sec t
. 5 sec Decay Heat Energy 17850 17100 13440 10270 8530 l
Addition* (Qtu/sec)
Safety ?njection 218 209 164 125 104 Floe!rate** needed to I;eep th core bel0Ã satul ated conditions (lb /sec)
> Decay He>t Energy "Addition is based on a 3425 tlllt po<;er. To obtain Decay Heat Energy Addition for another po<!er level divide by 3425 I".lt and multiply by appropriate po;!er level in IPJt.
~" SI Flowrate is based on Decay Heat Energy Addition at 3425 I;"ift, 14.7 psia contairr:,'nt pressure and a SI .temperature of 130'F. To obtain SI flo.!rate for difterent conditions d',vide the Decay Heat, Energy Addition by
III. SI'tiALL AHD IHTFRiIEDIATE BREAKS s
I For small breaks, an analysis similar to that performers for large b reaks was performed to determine the boric acid concentration in the core (0-2 42."". Thus for a 200 psia case, the marg',n be ween the cal-culated boric acid concentration and the solubility limit has actually increased.
12
For a small'break that completely depr'essurizes by'4 hours the of boric acid concentration approaches that of t: he large
'nalysis break analysis and the 200 psia case presented earlier is expected to be overly conservative.
Hot Le Recirculation l
I I
After hot le injection is initiated (9.24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) .a small breal', can offer a benefit:in terms of steam condensation. For exan',pie, in a 4 loop plant,.at a pressure of 200 psia and a SI water temperature of 130 F only 66 ibm/sec of SI water is needed .to keep the core below I
saturated conditions at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> instead of 218 ibm/sec at 14.7 psia.
13
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C... '"-C! 2!ES 1.'. .his p. ocedu e outlines the steps necessary to ter .in= te ihe ':.e t:cn P:.ase '> Safe y Inject on and to .'..:;,; iate the var ous r:.cdes of =:.';e "Recirculation f'hase" an" the "Res".'dual Spray" opera ;:on.
2.0 GTSCUSSi0'l 2.'. ':he "R'circ~ '.ation Pha=.e" is necessary !hen the;;~ater leve!
in '.'he R'::ST r=aches the lou level a~arz point, Tpe p)lpp ~ce Gf the rec.rcJla-.ion phas" -is to provide sufficie,"". '.Iate;"
to .'ie r- actor vessel to p "e~;ent
-
ny furi:her core d=vage and tc ri.aintain -"he core in =- suhcool~d condit.on fcmlo:,.!i" the LCD, ~".7er app. Gx'.l..ately 7.; "-nty i oJr (2-.'7 ho.!rs
~
he i e"". "cu.a" on ! s"'cned . ro:!i t:.= co l3 'i'"." "-c ".o:i
".::o'.e i 0:."" no .cg >necQon 6!o
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SD a j "UKps s desired "Res;Idual Spray" ."..ay b ir it;ated using cne o +'e Br'ui'ios ~
ltgh hath
~ I iuto""
':.l.l bore
~ I ," a~ua )
4.2.: Cold ' n-'ec-'.on Rec.irc lation
pe) 4.2.1-1 Be .. starting .he Cold 'eg .'n'=-c'ion, ch>eck th-t the recirculat:on su.";,o level is adecu>;=- io -rovide the rec;:;red YPSH for the RI R p JEps. { 100 in; ./e: 'I i:": o. co.:.r".: oan~~
4, 2,l the automatic Safe".y ~n:e: >on
'lock "niti-tion signals at th Con".'rol Board.
Ver;y t,".e!i) blocked by the OHo';,'I'.>g ind:cations on >,he Permissiv a.",d 'int r;ock Annunciators:
a) 'ressuriz r S: 8'locked =';.: 0.'I b) S eaaline Lso>ation SL Blocked L'G.'-.'> 0:~ .
c) Pr ssurizer SI P rr>i>ssi~re P-ll moth L:".-:TS GA dJ Lo"Lu ! avg PerK)ss ive, - 2 ~G~l
-".2.1-3 Clos ',"." ' - d "'.".R O'J...p ih ischa> -e C "c="-'"or'c" "=;ve i.: 3~4 " ~" -=~-'
Sto~ '"-> "l"'HR Pu)-:o 4.2.1-o C'o<<- -'!.- "'>"'-'R P>>>" Suction "~":v- i"3-"'2" 4.2,1-"" Stop >..".e ont. S p. a,'LZ 1
7 ~jo~= -'-. ">>>> P-+V 0 ~ ~
=-r-)g M>ls is+.
o'er:-
~ 41 J -
ww
~ -'-r-
> IV I
'/alve >
~0-22o, 4.2; Q Clo .
th= SI Pump!mini-Flo,. L'.ne ~'solat-:on Valves Il!0-262 c i>'l0-263,
~ ~ G,er. "r>> Rec',rcula-ing Su!".;p iso'":i "n
'lva ".~!>-306.
4,2,1" v Start tne '.s1 RHR Pu>.;o.
-':.2,1-.1 Ore..: S Pu~p Suction fry "'>'" 8 =
Val ve 'li0-.3."0.
! GCEuURE. GHP 4022.UOU bv'2 GE'3 CF 4 4.2.1-12 Sta. ~ the "il" Containment Spray Pump.
4.2.(-13 C(use the ';;o SI Pump Discharge Cross-Connect ".alves I!'>0- 270 and TttQ- 275.
4.2. 1(
-".'~r C! Gse th SI Pumo Suction l'G",l P>'S! Il'(0-26! .
4 2,1 15 Gpe.s S( Pu.;:p Suc"ion Cross-1'ie '".~ charcir>g pu' suc i.i on Ja1 ve It~(0-361 E; Ii(.0-362, 421( 16 !.'hen ti>e R'.;".'o-Lo level alar.: point i l cached ) stop ii(e '~PIR pulDp (7 Close th, "5" RHR pump =-
ction valve 'l'0-310.
4.2.1-1U Stop the "E" Ccnta rr..en-. spray :..".p.
n" 211c C!Ose the II"!=" Con".ainmert spray p
~
(>
m(p suction va ve '.'.0 "215.
42,1 20 Gpen " " Rac rcula'"ir.g sue>:p isol=ticr, nh l Q ( ( 4 rn(C'4e'> MUD ~
4.2.1-21 4.2.!-22 crar. rk " >wz+p,'nr>ef,. Sonay < z!o 4 2,1(-23 Gpen ( RHR .!" ." Charging Pumi S>'c on lG-d 0 Clo = C:;"-I gi .c' a>..o uc'on > t or" 4!'jS!
Pal ves .'!:0-910 ar."';."!0-91!,
Sw-'t"hing';rc".'. Colo L-g R'c'.rcul t'.~a to Hot Lcg ..O=i -"(- .G..!~o'-.
5,1.1 C!ose the Cola Leg Injection >solation > ('0 31 G"en Hot 'g >n-'ect': cr: 'solat on, LGJp (
L((& M 3 ~
~, (,3 -
VeriTy Hot ' Ir('ec tiiof. 'r>0":.> to Loops 1
) -': on
ri(vs,cuvvt v.".r -'<vcr, vvo.vu PAGE 4 OF 4 5.1.4, Close the Cole: =g In>ection Isolation ValYe I!6-"326.
Open Hot Leg In-'.ection Isolation, Loops 2 8; 3,
'.1.5 Y "~ve ."l".3-32o, 5.],5 s!eri)y Hot Leg 'n'ection Flo;Y to Loops 2 5 3 on iFI-320 Fs:;i-32l To cl ic n the "E" RHR PU lp for Pesidual Spray OperatloA, CJIJ I h i I 03't d i r ectly to the core fr or;. the RHR pump t .'PBinated 0
Pi.us Le before lni tiat>rg I sl dual s i"ay. A i lo:.i ng flow i'ro.".) the pLivip c!irectly to the core,. to .he h'.5h head pUBps and to spl ay Bay I'esUl lA a I'UAOUt i io'~,'reater des gn fo". th RHF ~ .";,p.
If on tot Leg Ill-ection, cl ose he ..0'" Leg '.iiectl cn
-'soia i0A Yc.lve I.-'.O"3! 5.
oa 2 J.so ic s,ion i'a! Ye ..si" ~l G.
oo2a3 Open "E" RHR Hx to Upper S"~=-y Heaaer Il':"-3-0,
Intermediate Break The analysis for intermediate breaks are ex P ected to a PP roach that of the 1arge break analysis but should be bounded by the, large and small break analysis because the-pressure transient is bounded.
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Docket Nos.
50-316 American Electric Power Service Corporation ATTN: Hr. John E. Dolan Executive Vice President 2 Broadway New York, New York 10004 Gentlemen:
Thank you for your letter dated January 21, 1975, which forwarded a report pursuant to 10 CFR 50.55(e) describing the safety implications of the welding doficiency that occurred at Donald C. Cook Nuclear Plant~ which had been inadvertently omitted from your report dated October 23, 1974. Your report will be reviewed and evaluated.
Should we require additional info~tion concerning this matter, wo will contact ybu.
Your cooperation concerning this matter is appreciatod.
Sincerely,
-Qaisinrl1 eland hy,
$ . G. Davis John G. Davis Deputy Director for Field. Operations Office of Inspection and Enforcement t bcc: PDR LPDR NSIC mxaT JG les Region III Central Files odrlcd~ FSEB C, S B DDFO r *
, HD urg JGDavis 0VRHAM0 W R@RRQQAC/,ilh 3/9'//75 /75 /75 Porm AEC-318 (Rev. 9.33) hZCM 0240 4 U, 0 44VRRHMRNT PRINTIN4 OPRICRI !074 020 I00
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