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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20073T0701994-07-0101 July 1994 Reports Changes & Errors in ECCS Evaluation Models ML20090J9651992-03-11011 March 1992 Forwards Piping Design Insps,Tests,Analysis & Acceptance Criteria (Itaac).Piping Design ITAAC Will Be Included as Part of Generic ITAAC ML20090J9701992-03-11011 March 1992 Forwards Proprietary Responses to Issues Re Sections 9.3,9.5 & 11.2 of Advanced BWR Ssar.Responses Reflect Correctons & Additions to Earlier Proprietary Submittals.Responses Withheld ML20090J9791992-03-11011 March 1992 Forwards Responses to Resolution of Issues Related to Advanced BWR Draft SER Chapters 1,2,3,5,6,9,10,12,13,14 & 15 (SECY-91-355) ML20090J9941992-03-11011 March 1992 Forwards Draft Rev 0 to Advanced BWR Srvdl Wetwell Piping Stress Analysis Design Rept & Draft Rev 0 to Design Rept, Main Steam Line a & Safety Relief Valve Discharge Piping Stress Analysis, Per 911209-10 Ge/Nrc Meeting ML20090G5801992-03-0909 March 1992 Summerizes Staff Position Re NRC Conference Call on Dser Comments to Advanced BWR Ssar ISI Requirements ML20090F6171992-03-0505 March 1992 Forwards Rev B to 23A6100AQ,Section 17.3 Re Responses to Request for Resolution of Issues Related to Reliability Assurance Program (Rap).Subj Responses Will Be Included as Amend to Advanced BWR Ssar in Future ML20094G9691992-03-0202 March 1992 Forwards Radwaste Bldg Seismic Analysis. Informs That GE Intends to Amend Ssar W/Subj Analysis in Future Amend ML20094G7141992-02-25025 February 1992 Forwards Proprietary Revised App 18E, Advanced BWR Man-Machine Interface Sys Design & Implementation Process, of Advanced BWR Ssar.App Withheld ML20092N1451992-02-25025 February 1992 Requests Addition of Listed Individual to Advanced BWR Document Distribution List ML20094G7401992-02-25025 February 1992 Forwards Proprietary Summary of 920127 Telcon W/Nrc & Brookhaven Lab to Clarify Aspects of Human Factors Review of Advanced Bwr,Specifically Review of Design Implementation Process.Summary Withheld ML20090A0441992-02-25025 February 1992 Forwards Proprietary Rev R-0 to Advanced BWR Project Common Engineering Work Plan. Plan Withheld ML20092L0801992-02-25025 February 1992 Forwards App 19P to Chapter 19 of Evaluation of Potential Mods to Advanced BWR Design ML20090B1881992-02-24024 February 1992 Forwards Draft Rev 0 to Advanced BWR Ssar Main Steam, Feedwater & Srvdl Piping Sys Design Criteria & Analysis Methods & Draft Rev 0 to Advanced BWR Feedwater Loop a Piping & Equipment Loads, Per Ge/Nrc 911209-10 Meeting ML20092M2931992-02-20020 February 1992 Forwards Discussion of Differences Between Us Advanced BWR & K-6/7 Project.Advanced BWR Design Under Review for for Differences to K 6/7 & Addl Differences Will Be Included in Future Ssar Amend ML20094G7201992-02-17017 February 1992 Forwards Proprietary Revised App 18E, Advanced BWR Man-Machine Interface Sys Design & Implementation Process, of Advanced BWR Ssar.App Withheld ML20092F4241992-02-14014 February 1992 Forwards Proprietary Portion of GE Response to Agenda Items Discussed During 911120-21 Meeting W/Nrc Reactor Sys Branch. Response Withheld ML20092F4601992-02-14014 February 1992 Forwards Nonproprietary Portion of GE Response to Agenda Items Discussed During 911120-21 Meeting W/Nrc Reactor Sys Branch Re Standby Liquid Control Sys Instrumentation & Controls ML20092F4971992-02-13013 February 1992 Forwards Proprietary App 18F, Emergency Operation Info & Controls to Chapter 18, Human Factors Engineering of Advanced BWR Std SAR Covering Control Room Inventory.App 18F Withheld ML20092F5251992-02-11011 February 1992 Responds to Performance & Quality Evaluation Branch Open Items on Advanced BWR Std SAR Chapter 14 ML20092F5181992-02-10010 February 1992 Forwards Responses to 920110-16 Requests for Addl Info on Advanced BWR Design for Severe Accidents ML20092C0251992-02-0303 February 1992 Forwards Proprietary Responses to Addl Info Noted in 911004 Draft SER for Chapter 7.Responses Are Cross Ref W/Summary Item Number Corresponding to Review Meeting in San Jose on 910807 & 08.Responses Withheld ML20092C1671992-02-0303 February 1992 Forwards Nonproprietary Responses to Addl Items of Concern Noted in Draft SER for Chapter 7.Advises That GE Will Amend Advanced BWR Ssar W/Responses in Future Amend ML20092C1831992-02-0303 February 1992 Forwards Response to Leak Before Break Issue Addressed in 911209-10 Ge/Nrc Meeting.Advises That GE Intend to Amend Ssar W/Response in Future Amend ML20100P9651992-01-31031 January 1992 Forwards Proprietary NEDC-30032 Joint Study Final Rept - Joint Study W/Regard to 'Study (II) Related to Advanced Bwr' - Thermal Margin During Rapid Coastdown,820401-830331. Rept Withheld ML20091K8911992-01-22022 January 1992 Forwards Response to Open Issue 3 of SECY-91-153 Re Main Steam Line Seismic Classification Including,Static Design Procedure to Be Utilized in Evaluation of Seismic Capability of Condenser Anchorage & Turbine Bldg ML20094E4571992-01-17017 January 1992 Forwards Tier 1 Design Certification Matl,Pilot Itacc Examples for GE Advanced BWR Design & Advanced BWR Design Certification Generic ITAAC for Seismic Category 1 Structures,Position Paper ML20087D2641992-01-10010 January 1992 Forwards Response to Agenda Items 1,5,9 & 16 Discussed at Ge/Nrc Reactor Sys Branch 911120-21 Meetings.Items Include, Stability Performance in Normal Operating Region,Loss of Ac Power & Loss of Feedwater Heating Transient ML20087D4771992-01-10010 January 1992 Forwards Responses to Agenda Item 12 Discussed During 911120-21 Meeting W/Reactor Sys Branch of Nrc.Responses Withheld ML20087D0011992-01-0606 January 1992 Forwards Proprietary Tables to App 18F to Chapter 18 Re Human Factors Engineering.Ge Will Amend Ssar to Include Subj Info in Future Amend.Encl Withheld ML20087B7161992-01-0606 January 1992 Forwards Response to Issues Raised at Ge/Nrc 911209-10 Meetings Re Inservice Insp Relief Requests for Reactor Pressure Vessel Bottom Head Weld & Reactor Pressure Vessel Bottom head-to-shell Weld ML20086U5451992-01-0606 January 1992 Forwards Response to NRC Request for Addl Info Re Incorporation of Operating Experience in Advanced BWR ML20086U1941991-12-20020 December 1991 Confirms That Licensee Advanced BWR Application Should Be Processed as Application for Part 52 Final Design Approval & Subsequent Design Certification Per 10CFR52.45 ML20086N9601991-12-19019 December 1991 Forwards Proprietary & Nonproprietary Versions of Rev B to Update of App 9A, Reactor Bldg Fire Hazard Analysis ML20086P2161991-12-19019 December 1991 Forwards Proprietary Responses to Resolution of Issues Re Advanced BWR Draft SER ML20086P2251991-12-19019 December 1991 Forwards Nonproprietary Responses to Resolution of Issues Re Advanced BWR Draft SER ML20091H4061991-12-13013 December 1991 Forwards Selected Sections of Chapter 9, Auxiliary Sys & Chapter 18, Human Factors Engineering of Ssar for Advanced Bwr,Amend 19,including Update of Control Bldg Fire Protection Drawings.Encl Withheld ML20086N2161991-12-13013 December 1991 Forwards Amend 19 to Advanced BWR Ssar ML20094D2041991-12-12012 December 1991 Forwards Proposed Advanced BWR Tech Specs,Per Vendor to Nrc.Specs Will Be Documented Via Amend to Chapter 16 of Advanced BWR Ssar,Once Specs Finalized ML20086H5741991-12-0202 December 1991 Describes Plan for Submitting Advanced BWR Tech Specs to Nrc,Per 911108 Meeting.First Submittal of Noninstrumentation & Control Sys Will Be Submitted by 911213.Third Submittal Re 65 Unchanged LCOs Will Be Submitted by 920131 ML20086H6101991-11-27027 November 1991 Forwards Responses to Open Issues in GE Advanced BWR Ssar Chapter 8 Re Offsite Power Sys & Protective Sys for Reactor Internal Pumps,Per 910916-18 Meeting W/Nrc.Proprietary Versions of Response Withheld ML20086H6161991-11-27027 November 1991 Forwards Proprietary Responses to Open Issues 8.3.3.6 & 8.3.5 for Advanced BWR Ssar,Chapter 8,per Commitment at 910916-18 Meeting in San Jose.Encl Withheld ML20086E4831991-11-25025 November 1991 Forwards Tables Re Significant New Open Issues Included in Final,Draft Ser,Significant Open Items Included in All Draft Sers,Ge Future Submittals & Proposed Issues for Discussion at Dec Mgt Meeting,Per NRC ML20086C7201991-11-12012 November 1991 Forwards Proprietary Draft Writeup for Fire Protection PRA, as Requested in Draft SER on Advanced BWR Pra,Per SECY-91-309,dtd 911001.Encl Withheld ML20086A8121991-11-12012 November 1991 Forwards Draft Writeup for Fire Protection Probabilistic Risk Assessment Requested in Draft SER on Advanced BWR Probabilistic Risk Assessment.Ge Will Amend Ssar to Include Info When Finalized ML20079P1731991-11-0707 November 1991 Forwards Response to Discussion Item 7 from 910906 Conference Call Re Rod Block Algorithm & Setpoint ML20079L7461991-11-0101 November 1991 Forwards Summary of Major Advanced BWR Design Differences, Assessment of How TS Differ from Improved Ts,Including Summary of New,Different or Inapplicable & Example of How TS Would Be Written Where TS Differ from Improved TS ML20079M2561991-11-0101 November 1991 Forwards Proprietary GE Responses to Staff Position Re GE BWR Power Upgrade Program,Dtd 910930.Responses in Ref to Licensing Topical Rept NEDC-31897P-1, Generic Evaluations of GE BWR Power Uprate,June 1991. Responses Withheld ML20079L3121991-10-25025 October 1991 Forwards Rept Providing Update of in-reactor Surveillance Programs & Overall GE BWR Fuel Experience Through Dec 1990 ML20058L6811991-10-25025 October 1991 Forwards Rept Providing Update of in-reactor Surveillance Programs & Overall GE BWR Fuel Experience Through Dec 1990 1994-07-01
[Table view] Category:INCOMING CORRESPONDENCE
MONTHYEARML20073T0701994-07-0101 July 1994 Reports Changes & Errors in ECCS Evaluation Models ML20090J9651992-03-11011 March 1992 Forwards Piping Design Insps,Tests,Analysis & Acceptance Criteria (Itaac).Piping Design ITAAC Will Be Included as Part of Generic ITAAC ML20090J9701992-03-11011 March 1992 Forwards Proprietary Responses to Issues Re Sections 9.3,9.5 & 11.2 of Advanced BWR Ssar.Responses Reflect Correctons & Additions to Earlier Proprietary Submittals.Responses Withheld ML20090J9791992-03-11011 March 1992 Forwards Responses to Resolution of Issues Related to Advanced BWR Draft SER Chapters 1,2,3,5,6,9,10,12,13,14 & 15 (SECY-91-355) ML20090J9941992-03-11011 March 1992 Forwards Draft Rev 0 to Advanced BWR Srvdl Wetwell Piping Stress Analysis Design Rept & Draft Rev 0 to Design Rept, Main Steam Line a & Safety Relief Valve Discharge Piping Stress Analysis, Per 911209-10 Ge/Nrc Meeting ML20090G5801992-03-0909 March 1992 Summerizes Staff Position Re NRC Conference Call on Dser Comments to Advanced BWR Ssar ISI Requirements ML20090F6171992-03-0505 March 1992 Forwards Rev B to 23A6100AQ,Section 17.3 Re Responses to Request for Resolution of Issues Related to Reliability Assurance Program (Rap).Subj Responses Will Be Included as Amend to Advanced BWR Ssar in Future ML20094G9691992-03-0202 March 1992 Forwards Radwaste Bldg Seismic Analysis. Informs That GE Intends to Amend Ssar W/Subj Analysis in Future Amend ML20094G7401992-02-25025 February 1992 Forwards Proprietary Summary of 920127 Telcon W/Nrc & Brookhaven Lab to Clarify Aspects of Human Factors Review of Advanced Bwr,Specifically Review of Design Implementation Process.Summary Withheld ML20090A0441992-02-25025 February 1992 Forwards Proprietary Rev R-0 to Advanced BWR Project Common Engineering Work Plan. Plan Withheld ML20094G7141992-02-25025 February 1992 Forwards Proprietary Revised App 18E, Advanced BWR Man-Machine Interface Sys Design & Implementation Process, of Advanced BWR Ssar.App Withheld ML20092N1451992-02-25025 February 1992 Requests Addition of Listed Individual to Advanced BWR Document Distribution List ML20092L0801992-02-25025 February 1992 Forwards App 19P to Chapter 19 of Evaluation of Potential Mods to Advanced BWR Design ML20090B1881992-02-24024 February 1992 Forwards Draft Rev 0 to Advanced BWR Ssar Main Steam, Feedwater & Srvdl Piping Sys Design Criteria & Analysis Methods & Draft Rev 0 to Advanced BWR Feedwater Loop a Piping & Equipment Loads, Per Ge/Nrc 911209-10 Meeting ML20092M2931992-02-20020 February 1992 Forwards Discussion of Differences Between Us Advanced BWR & K-6/7 Project.Advanced BWR Design Under Review for for Differences to K 6/7 & Addl Differences Will Be Included in Future Ssar Amend ML20094G7201992-02-17017 February 1992 Forwards Proprietary Revised App 18E, Advanced BWR Man-Machine Interface Sys Design & Implementation Process, of Advanced BWR Ssar.App Withheld ML20092F4241992-02-14014 February 1992 Forwards Proprietary Portion of GE Response to Agenda Items Discussed During 911120-21 Meeting W/Nrc Reactor Sys Branch. Response Withheld ML20092F4601992-02-14014 February 1992 Forwards Nonproprietary Portion of GE Response to Agenda Items Discussed During 911120-21 Meeting W/Nrc Reactor Sys Branch Re Standby Liquid Control Sys Instrumentation & Controls ML20092F4971992-02-13013 February 1992 Forwards Proprietary App 18F, Emergency Operation Info & Controls to Chapter 18, Human Factors Engineering of Advanced BWR Std SAR Covering Control Room Inventory.App 18F Withheld ML20092F5251992-02-11011 February 1992 Responds to Performance & Quality Evaluation Branch Open Items on Advanced BWR Std SAR Chapter 14 ML20092F5181992-02-10010 February 1992 Forwards Responses to 920110-16 Requests for Addl Info on Advanced BWR Design for Severe Accidents ML20092C0251992-02-0303 February 1992 Forwards Proprietary Responses to Addl Info Noted in 911004 Draft SER for Chapter 7.Responses Are Cross Ref W/Summary Item Number Corresponding to Review Meeting in San Jose on 910807 & 08.Responses Withheld ML20092C1671992-02-0303 February 1992 Forwards Nonproprietary Responses to Addl Items of Concern Noted in Draft SER for Chapter 7.Advises That GE Will Amend Advanced BWR Ssar W/Responses in Future Amend ML20092C1831992-02-0303 February 1992 Forwards Response to Leak Before Break Issue Addressed in 911209-10 Ge/Nrc Meeting.Advises That GE Intend to Amend Ssar W/Response in Future Amend ML20100P9651992-01-31031 January 1992 Forwards Proprietary NEDC-30032 Joint Study Final Rept - Joint Study W/Regard to 'Study (II) Related to Advanced Bwr' - Thermal Margin During Rapid Coastdown,820401-830331. Rept Withheld ML20091K8911992-01-22022 January 1992 Forwards Response to Open Issue 3 of SECY-91-153 Re Main Steam Line Seismic Classification Including,Static Design Procedure to Be Utilized in Evaluation of Seismic Capability of Condenser Anchorage & Turbine Bldg ML20094E4571992-01-17017 January 1992 Forwards Tier 1 Design Certification Matl,Pilot Itacc Examples for GE Advanced BWR Design & Advanced BWR Design Certification Generic ITAAC for Seismic Category 1 Structures,Position Paper ML20087D2641992-01-10010 January 1992 Forwards Response to Agenda Items 1,5,9 & 16 Discussed at Ge/Nrc Reactor Sys Branch 911120-21 Meetings.Items Include, Stability Performance in Normal Operating Region,Loss of Ac Power & Loss of Feedwater Heating Transient ML20087D4771992-01-10010 January 1992 Forwards Responses to Agenda Item 12 Discussed During 911120-21 Meeting W/Reactor Sys Branch of Nrc.Responses Withheld ML20087D0011992-01-0606 January 1992 Forwards Proprietary Tables to App 18F to Chapter 18 Re Human Factors Engineering.Ge Will Amend Ssar to Include Subj Info in Future Amend.Encl Withheld ML20087B7161992-01-0606 January 1992 Forwards Response to Issues Raised at Ge/Nrc 911209-10 Meetings Re Inservice Insp Relief Requests for Reactor Pressure Vessel Bottom Head Weld & Reactor Pressure Vessel Bottom head-to-shell Weld ML20086U5451992-01-0606 January 1992 Forwards Response to NRC Request for Addl Info Re Incorporation of Operating Experience in Advanced BWR ML20086U1941991-12-20020 December 1991 Confirms That Licensee Advanced BWR Application Should Be Processed as Application for Part 52 Final Design Approval & Subsequent Design Certification Per 10CFR52.45 ML20086N9601991-12-19019 December 1991 Forwards Proprietary & Nonproprietary Versions of Rev B to Update of App 9A, Reactor Bldg Fire Hazard Analysis ML20086P2251991-12-19019 December 1991 Forwards Nonproprietary Responses to Resolution of Issues Re Advanced BWR Draft SER ML20086P2161991-12-19019 December 1991 Forwards Proprietary Responses to Resolution of Issues Re Advanced BWR Draft SER ML20091H4061991-12-13013 December 1991 Forwards Selected Sections of Chapter 9, Auxiliary Sys & Chapter 18, Human Factors Engineering of Ssar for Advanced Bwr,Amend 19,including Update of Control Bldg Fire Protection Drawings.Encl Withheld ML20086N2161991-12-13013 December 1991 Forwards Amend 19 to Advanced BWR Ssar ML20094D2041991-12-12012 December 1991 Forwards Proposed Advanced BWR Tech Specs,Per Vendor to Nrc.Specs Will Be Documented Via Amend to Chapter 16 of Advanced BWR Ssar,Once Specs Finalized ML20086H5741991-12-0202 December 1991 Describes Plan for Submitting Advanced BWR Tech Specs to Nrc,Per 911108 Meeting.First Submittal of Noninstrumentation & Control Sys Will Be Submitted by 911213.Third Submittal Re 65 Unchanged LCOs Will Be Submitted by 920131 ML20086H6161991-11-27027 November 1991 Forwards Proprietary Responses to Open Issues 8.3.3.6 & 8.3.5 for Advanced BWR Ssar,Chapter 8,per Commitment at 910916-18 Meeting in San Jose.Encl Withheld ML20086H6101991-11-27027 November 1991 Forwards Responses to Open Issues in GE Advanced BWR Ssar Chapter 8 Re Offsite Power Sys & Protective Sys for Reactor Internal Pumps,Per 910916-18 Meeting W/Nrc.Proprietary Versions of Response Withheld ML20086E4831991-11-25025 November 1991 Forwards Tables Re Significant New Open Issues Included in Final,Draft Ser,Significant Open Items Included in All Draft Sers,Ge Future Submittals & Proposed Issues for Discussion at Dec Mgt Meeting,Per NRC ML20086C7201991-11-12012 November 1991 Forwards Proprietary Draft Writeup for Fire Protection PRA, as Requested in Draft SER on Advanced BWR Pra,Per SECY-91-309,dtd 911001.Encl Withheld ML20086A8121991-11-12012 November 1991 Forwards Draft Writeup for Fire Protection Probabilistic Risk Assessment Requested in Draft SER on Advanced BWR Probabilistic Risk Assessment.Ge Will Amend Ssar to Include Info When Finalized ML20079P1731991-11-0707 November 1991 Forwards Response to Discussion Item 7 from 910906 Conference Call Re Rod Block Algorithm & Setpoint ML20079M2561991-11-0101 November 1991 Forwards Proprietary GE Responses to Staff Position Re GE BWR Power Upgrade Program,Dtd 910930.Responses in Ref to Licensing Topical Rept NEDC-31897P-1, Generic Evaluations of GE BWR Power Uprate,June 1991. Responses Withheld ML20079L7461991-11-0101 November 1991 Forwards Summary of Major Advanced BWR Design Differences, Assessment of How TS Differ from Improved Ts,Including Summary of New,Different or Inapplicable & Example of How TS Would Be Written Where TS Differ from Improved TS ML20079L3121991-10-25025 October 1991 Forwards Rept Providing Update of in-reactor Surveillance Programs & Overall GE BWR Fuel Experience Through Dec 1990 ML20085K2631991-10-25025 October 1991 Forwards Addl Documents,In Response to NRC Re Resolution of Issues Related to Chapter 18 of Ssar for Advanced BWR Design.Documents Withheld 1994-07-01
[Table view] |
Text
,
GE NucIcar Energy s
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April 10,1991 MFN No.037 91 Docket No. STN 50 605 EEN.0123 Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention: Charles L. Miller, Director Standardization and Non. Power Reactor Project Directorate
Subject:
GE Responses (Proprietary information) to Discussion items of April 3,1991, GE/NRC Reactor Systems Branch Conference Call
Reference:
Submittal of Amendment 13, Proprietary Information, to GE's ABWR SSAR, MFN No. 077 90, dated July 3,1990 Enclosed are thirty four (34) copies of the GE responses to the subject :liscussion items.
Responses to the discussion items contain information that is designated as General Electric Company proprietary information. This material relates to the Chapter 18 proprietary information that was previously sent to the NRC (Reference) and its corresponding proprietary affidavit.
It is intended that GE will amend the SSAR, as appropriate, with these responses in a future amendment.
Sincerely, D.J. Robare, Acting Manager Regulatory and Analysis Services M/C 382, (408) 925 6948 cc: F. A. Ross (DOE)
D. C. Scaletti (NRC)
G. Thomas (NRC) p'(
@/
D. R. Wilkins (GE) U '
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l J. F. Quirk (GE) ( h g,, \ l t 3% $
9104150190 910410 PDR ADOCK 05000603 A PItR
l 4 0 4-RESPONSES TO DISCUSSION ITEMS OF APRIL 3.1991 CE/NRC CONFERENCE CALL ,
i I
NO. 1 In the Introduction section p.1 The following sentence in Rev. 4, EPO is deleted in the ABWR EPd. " Suppression pool, 1 drywell.and containment temperature are determined by plant specific procedures for determinin6 bulk suppression pool water temperature, drywell atmospheric average tempora-ture, and Mark III containment atmospheric average tempera-ture, respectively."
The above sentence should be kept since it is applicabic for
- ABWR except for the reference to Mark III containment atmo-spheric average temperature.
RESPONSE
In the ABWR design, the average bulk suppression pool tempera-ture is calculated by the individual system microprocessor an displayed to the operator. Individual temperature _ signals from different locations can.be also be displayed.- [Same dis-plays are also availabic at the Remote' Shutdown Panel. ) The temperature processing ~ algorithm will include sensor failure detection and uncovery of sensor due to changes in suppression pool water level. _All signals _to the main control room are multiplexed, and hence performing calculations is simple.=
Refor_to SSAR Subsection 7.6.1.7 for a description of the sup- i pression pool temperature monitoring system.
The'drywell' atmospheric average temperature will be treated;in the same manner as the-suppression pool average bulk tempera -
ture. (See Subsection 7.5.2.l(2)(j)] .
No. 2 OnlPage 1 2, it-is stated that "Conformance with the guide.
' lines does not ensure = strict conformance with a plant techni-cal. specifications or other licensing basis," This statement is misleading and confusing. -The: staff is developing a posiv- '
tion on the _ issue of, EPG versus licensing basis. We are work-
'ing with the BWR-Owner's Group on this issue. The-quoted' statement will need to be revised to reflect our position as it is. finalized.
RESPONSE
.We are aware of this issuei We will revise this statement when your position on it is finalized.
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hiO. 3 Add the following abbreviations to Table 1 (18A): ilSBW llot Shutdown Boron Weight, MSCWL Minimum Steam Cooling Water Level. In Chapter 6.3, the abbreviation "LPFL" is used to de-scribe the LPCI mode of RilR In Table 1, "LPCF" is used.
Which is correct?
RESPONSE
MSCWL, Minimum Steam Cooling Water Level, and llSBV, Hot Shut-down Boron Weight were added to Table 1. LPFL will be used throughout the EPC. (During the conference call LPCF was in- t
.dicated rather than LPCF). LPCF will be changed to LPFL, all ,
places, in the next amendment.
NO. 4 In Caution #5, ilPCF pump and in RilR pump (Page RC 5) NPSil values are given for suppression chamber overpressure (SCO).
SCO is equal to suppression chamber (SC) airspace pressure +
water head'over suction strainer. Regulatory Guide 1.1 does not allow credit for SC airspace pressure. Describe in detail the advantage of SCO on the required. IlPCF and RilR pump NPSil values given in Caution #5 and on Page RC 5. Provide cor-rected NPSil values.
RESPONSE
The' method for using the SCO is already established in EPG Rev. 4. This approach is consistent with the philosophy of using realistic analysis as opposed to licensing type analysis methods. No changes are required.
NO. 5 In the RPV control guidelines entry conditions, the following condition "or RPV water level cannot be determined" should be added to "The RPV water level below level scram setpoint".
RESPONSE
The proposed statement is not currently in EPG Rev 4. We are '
aware that the BVROG is working on this issue. We will change the ABWR EPC when its position is finalized.
NO. 6 The suppression pool temperature versus ' reactor power curve for step RC/Q-6 is missing. Include the curve as given in the EPG, Rev. 4 l
L RESPONSE:
With the FMORD .Run In functional, . the control rods are fully inserted in approximately two minutes with the motor drives.
During the rod insertio_n, analysis results show that with a
~ failure to scram with the hydraulic accumulators and with the FMCRD Run In function operational, suppression pool tempera-ture can be as high as 135"F (57.2*C). We have included the ,
I. boron injection initiation temperature curve and revised step RC/Q 6 as shown on page 18A.4 14.
MISC 9104091: tj m l
h10. 7 Step'RC/Q. 7.1 Resetting the ARI logic is not included in the ABWR EPG. ARI is in the ABVR design. Table 1.8B 1 does not explain why this step _is deleted.
RESPONSE
The ABVR EPG was revised to retain step RC/Q-7.1 (page 18A.4 15), resetting of ARI logic as follows:
" Reset ARI, bypassing ARI logic trips is necessary."
NO. 8 STEP RC/Q 72, " Reset the scram defeating RPS logic trips if necessary" is deleted. . Table 18B 1 provides the explanation that it is not applicable for ABWR, Since there is a RPS for ABVR, a more detailed justification for the deletion is neces-sary.
RESPONSE
Step RC/Q 7.2 has been retained as follows:
" Reset the scram, bypassing RPS logic trips if necessary, and initiate a manual scram."
]
The phrase " drain the scram discharge volume" in EPG Rev. 4 is not applicable to the ABWR_because it does not have a scram discharge volume.
Table 18B 1 (page 18B 6) has been revised accordingly. .
NO. 9 The Step C2 2 directs the operator to enter contingency #3 l steam cooling rather than step- RC/P-4 specified in the EPG, Rev. 4. The Table'18B 1 does not explain why this deviation is taken.
RESPONSE
This was a word processing error. The reference to RC/P 4-in Step C2 2,_has been changed.
I
- N0c 10 The suppression pool temperature versus reactor power curve- 'l for step C5-2 is missing. Include the curve as given in EPG, l Rev. 4..
i RESPONSE: I The boron inj ection initiation temperature curve has_ been addedl(page 18A.12 2).
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NO. 11 In the EPG Rev. 4, Step C6 3, RPV venting is performed irre.
spective of the radioactivity release rate. But in the ABWR EPG, RPV venting is performed if containment radiation is ;
below the core damage radiation level. What is the difference in the RPV- venting philosophy? Table 18B 1 does not ade-quately explain the basis for RPV venting. Explain in detail the ABWR RPV venting philosophy and revise Table 18B+1 accord-ingly (Ref: Step C6 3).
RESPONSE
o In the ABWR EPG, RPV venting is performed if containment radi.
ation level is below the core damage radiation level. This is v to preclude releasing radioactivity outside of the primary containment and is believed to be a more conservative approach than that adapted in EPG Rev. 4.
Furthermore, if containment radiation is high indicative of core damage, the containment will be flooded only to the bottom of the RPV as indicated by the override statement for Step C6-2. Flooding to the bottom of RPV in the presence of core damage will avoid covering the vent-pipes leading to the containment overpressure protection rupture disks. This strategy is designed to avoid discharing water into the vent path (should containment pressure exceed rupture disk pres.
sure) which could result in damage to the equipment in the vent path.
Table 18B 1 has been revised (for Step C6 3) accordingly.(page 18B 23).-
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