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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20248E1991998-05-28028 May 1998 Informs That Staff Has Identified Six Ltrs (Enclosed) to GE Re Potential Proprietary Disclosure.Ltrs Specifically Requested That GE Review Encl to Determine If Contained GE Proprietary Info.Encl Withheld ML20247R4901998-05-20020 May 1998 Informs That Encl Staff Rept That Was Attached to Has Been Reviewed & Contains No GE Proprietary Info.W/O Encl ML20247M6911998-05-18018 May 1998 Forwards Staff Review of Rept, Giraffe Sbwr Sys Interactions Test Rept, (NEDC-3254OP,Revision-0).Informs That Review of Sbwr Was Terminated in 1996 ML20247M7021998-05-18018 May 1998 Forwards Staff Review of General Electric Panthers - IC Test Rept (Siet 00458RP95).Informs That Sbwr Was Terminated in 1996 ML20134L3181996-11-19019 November 1996 Advises That GE Pathers/Ic ATRs Submitted w/951025 Ltr Will Be Withheld from Public Disclosure Ref 10CFR2.790,based on Review of Listed Reasons for Maintaining Info as Proprietary ML20134F3861996-11-0101 November 1996 Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp 99900403/96-01 on 960708 ML20134D6271996-10-25025 October 1996 Provides Sbwr - Panthers/Ic Apparent Test Results,Phase 1 Affidavit Supporting Request to Withhold Info from Public Disclosure ML20129C2881996-10-21021 October 1996 Informs of Review & Determination That Info Identified in Apparent Test Results Contain Trade Secrets or Proprietary Commercial Info & Will Be Withheld from Public Disclosure ML20128M7491996-10-11011 October 1996 Provides Affidavit to Tests & Requests That NRC Accepts Request to Withhold Sbwr Panda steady-state Test S10-S13 Pcc Performance from Public Disclosure ML20128H4971996-10-0707 October 1996 Advises That GE Giraffe Sys Apparent Test Results Repts Will Be Withheld from Public Disclosure Ref 10CFR2.790,per 960321 Request ML20128H5141996-10-0707 October 1996 Informs That Licensee 951212 Request That GE Panda steady- State Tests S1 Through S6 Pcc Performance Apparent Test Results,Rev 1 Be Withheld from Public Disclosure,Per 10CFR2.790,granted ML20128H5301996-10-0707 October 1996 Informs That Licensee 960314 Request to Withhold GE Girafee Helium Tests Apparent Test Results Repts & Data Transmittal for Giraffe Helium Tests H3 & H4 from Public Disclosure,Per 10CFR2.790,granted ML20129F5031996-10-0303 October 1996 Advises That Info Submitted in 960109 Rept Entitled, Post-Test Calculations of Panda Pcc Steady-State Test, Will Be Withheld from Public Disclosure,Per 10CFR2.790(b)(5) & Section 103(b) of AEC of 1954 ML20129F5061996-10-0303 October 1996 Advises That Info Submitted in 960109 Rept Entitled, Panther/Ic Apparent Test Results Phase 3, Will Be Withheld from Public Disclosure,Per 10CFR2.790(b)(5) & Section 103(b) of AEC of 1954 ML20129E8831996-10-0202 October 1996 Informs That GE Panda Steady-State Tests Data Transmittal Rept Will Be Withheld from Public Disclosure,Per 10CFR2.790 (b)(5) & Section 103(b) of AEA of 1954,as Amended ML20129F6181996-10-0202 October 1996 Advises That Giraffe Sbwr Sys Interactions Test Rept Will Be Withheld from Public Disclosure Ref 10CFR2.790, Per 960617 Request ML20129F6341996-10-0202 October 1996 Advises That Panthers/Ic Atrs Will Be Withheld from Public Disclosure Ref 10CFR2.790,per 960222 Request ML20129G5841996-10-0202 October 1996 Advises That,Data Transmittal for Giraffe Helium Tests H1 & H2,as Requested by Will Be Withheld from Public Disclosure Per 10CFR2.790(b)(5) & Section 103(b) of 1954 AEA ML20129E6361996-10-0101 October 1996 Advises That GE Panda Transient Integral Test Data Transmittal Repts Will Be Withheld from Public Disclosure Ref 10CFR2.790,per 960816 Request ML20129E8681996-10-0101 October 1996 Informs That Licensee 960222 Request to Withhold GE Panda Steady-State Tests S10-S13 Performance from Public Disclosure Per 10CFR2.790.Request Denied Because No Affidavit Was Submitted ML20129G6311996-10-0101 October 1996 Advises That Giraffe Helium Series Test Rept,As Requested by Will Be Withheld from Public Disclosure Per 10CFR2.790(b)(5) & Section 103(b) of 1954 AEA ML20248F3891996-07-31031 July 1996 Forwards Rept on Staff Evaluation of GE Tracg Model Description,Rev 1,related to Containment Area,In Response to ML20115D0441996-07-11011 July 1996 Forwards Nonproprietary NEDO-32608, Giraffe Sbwr Helium Series Test Rept. Proprietary Rept Submitted by GE ML20115C4601996-07-0808 July 1996 Addresses Nonconformances Noted in Insp Rept 99900403/96-01 Re Panda Testing.C/A:Apparent Test Results Repts (ATR) Which Contains All Info Specified in ATRs in Test Spec & Test Plans Issued for Listed Tests ML20113C2071996-06-27027 June 1996 Forwards NEDO-32540, Giraffe Sbwr Sys Interactions Test Rept ML20113B5661996-06-24024 June 1996 Forwards Proprietary Test Rept for Giraffe Helium Series Tests.Test Procedures & Instrumentation Drawings Encl.Encls Withheld Per 10CFR2.790 ML20113A0111996-06-17017 June 1996 Forwards Proprietary Rev 0 of NEDC-32540P, Giraffe Sbwr Sys Interactions Test Rept. Transmittal Satisfies Items 38 & 39 of GE Re Updated Status of Test Documentation Submittals.Encl Withheld (Ref 10CFR2.790) ML20117M9651996-06-14014 June 1996 Forwards non-proprietary Rev 0 to Siet 00458RP95, PANTHERS-IC Test Rept ML20112J0791996-06-14014 June 1996 Forwards Proprietary Version of Rev 0 to 00458RP95, PANTHERS-IC Test Rept. Rept Prepared for GE by Siet S.P.A Under Contract to Enea.Rept Withheld from Public Disclosure Per 10CFR2.790 ML20117K7091996-06-10010 June 1996 Requests 30 Day Extension Until 960710 to Respond to NRC Re Nonconformances & Unresolved Items Noted in Insp Rept 99900403/96-01 on 960305-08 ML20112G6711996-06-0707 June 1996 Forwards Responses to NRC Questions & Comments Re Rev 1 of GE Scaling Rept NEDC-3228P, Scaling of Sbwr Related Tests ML20117H4561996-05-22022 May 1996 Clarifies Charges for TAC M84214,GE Sbwr - RAI - Initial Test Program (Chapter 14) on Invoice XM0439-96,dtd 960429 ML20117F5711996-05-14014 May 1996 Requests That Je Leatherman Be Removed from Svc List & Rh Buchholz Be Added ML20108B8451996-04-26026 April 1996 Requests Addl Review of Repts by Nrc,Per Input Provided by Domestic & Intl Utils to Go Further than Indicated in GE 960304 & 13 Ltrs W/Efforts on Tracg Qualification for Sbwr Application.Utils,Epri & GE Desire to Meet W/Nrc on 960528 ML20107A4681996-04-10010 April 1996 Requests Copies of English Translations of Repts on Par, to Facilitate Sbwr Review ML20101Q6961996-04-10010 April 1996 Forwards non-proprietary Apparent Tests Results (ATR) Repts for Helium Tests & tie-back Tests ML20101F8871996-03-21021 March 1996 Forwards Proprietary Apparent Test Results Rept (ATR) Sys Interaction Tests (Sit).Proprietary Repts Withheld (Ref 10CFR2.790) ML20101F2981996-03-20020 March 1996 Forwards Latest Revs of Panda Project Control Plan & QA Procedures ML20101B7591996-03-14014 March 1996 Advises That GE Redirecting Focus of Simplified BWR Programs from Plants of 670 Mwe Size to Plants of 1,000 Mwe or Larger ML20101C4731996-03-14014 March 1996 Forwards Proprietary & Nonproprietary Apparent Test Results Rept for Four Helium Tests & Two tie-back Tests.Proprietary Repts Withheld Per 10CFR2.790.Affidavit Encl ML20101B7381996-03-13013 March 1996 Discusses Redirecting Focus of Sbwr Programs from 670 Mwe Size to 1,000 Mwe or Larger Size Plants Reducing Activity Level on Tracg Effort as It Applies to 670 Mwe Plant ML20101B7501996-03-12012 March 1996 Discusses Sbwr Closure of Vacuum Breaker Test Program ML20100N9301996-03-0404 March 1996 Informs That GE Redirecting Focus of Sbwr Program from Plants of 670 Mwe Size to Plants of 1,000 Mwe or Larger. Listing of Open Activities,Desired Closure Objective & Schedule Encl ML20101B8011996-02-26026 February 1996 Discusses Sbwr Re NRC Site Visit & Insp to Panda,Ansaldo & Dodewaard ML20100J0321996-02-23023 February 1996 Submits non-proprietary Sbwr Highlights & GE Slides from NRC 960215 Meeting ML20100J0141996-02-23023 February 1996 Forwards Proprietary Sbwr Highlights & GE Slides from NRC 960215 Meeting.Encl Withheld ML20149K0521996-02-15015 February 1996 Forwards Proprietary Test Results for Giraffe Helium Tests H1 & H2.Attachment 1 to Ltr Provides List of Instruments Included on Computer Disk.Encl Withheld (Ref 10CFR2.790) ML20097F7101996-02-15015 February 1996 Forwards Sbwr Status & Schedule 960214 & Payments Made to NRC for Last Four Yrs,In Response to Ref Telcon Requests ML20100J4041996-02-12012 February 1996 Transmits Proprietary Rev 1 to Licensing Technical Rept NEDE-32176P, Tracg Model Description Open Items.Encl Withheld ML20100G8361996-02-12012 February 1996 Forwards Proprietary Rev 1 to Topical Rept NEDE-32176P, Tracg Model Description. Rev 1 to Topical Rept NEDE-32176P Withheld 1998-05-28
[Table view] Category:INCOMING CORRESPONDENCE
MONTHYEARML20247R4901998-05-20020 May 1998 Informs That Encl Staff Rept That Was Attached to Has Been Reviewed & Contains No GE Proprietary Info.W/O Encl ML20134D6271996-10-25025 October 1996 Provides Sbwr - Panthers/Ic Apparent Test Results,Phase 1 Affidavit Supporting Request to Withhold Info from Public Disclosure ML20128M7491996-10-11011 October 1996 Provides Affidavit to Tests & Requests That NRC Accepts Request to Withhold Sbwr Panda steady-state Test S10-S13 Pcc Performance from Public Disclosure ML20115D0441996-07-11011 July 1996 Forwards Nonproprietary NEDO-32608, Giraffe Sbwr Helium Series Test Rept. Proprietary Rept Submitted by GE ML20115C4601996-07-0808 July 1996 Addresses Nonconformances Noted in Insp Rept 99900403/96-01 Re Panda Testing.C/A:Apparent Test Results Repts (ATR) Which Contains All Info Specified in ATRs in Test Spec & Test Plans Issued for Listed Tests ML20113C2071996-06-27027 June 1996 Forwards NEDO-32540, Giraffe Sbwr Sys Interactions Test Rept ML20113B5661996-06-24024 June 1996 Forwards Proprietary Test Rept for Giraffe Helium Series Tests.Test Procedures & Instrumentation Drawings Encl.Encls Withheld Per 10CFR2.790 ML20113A0111996-06-17017 June 1996 Forwards Proprietary Rev 0 of NEDC-32540P, Giraffe Sbwr Sys Interactions Test Rept. Transmittal Satisfies Items 38 & 39 of GE Re Updated Status of Test Documentation Submittals.Encl Withheld (Ref 10CFR2.790) ML20112J0791996-06-14014 June 1996 Forwards Proprietary Version of Rev 0 to 00458RP95, PANTHERS-IC Test Rept. Rept Prepared for GE by Siet S.P.A Under Contract to Enea.Rept Withheld from Public Disclosure Per 10CFR2.790 ML20117M9651996-06-14014 June 1996 Forwards non-proprietary Rev 0 to Siet 00458RP95, PANTHERS-IC Test Rept ML20117K7091996-06-10010 June 1996 Requests 30 Day Extension Until 960710 to Respond to NRC Re Nonconformances & Unresolved Items Noted in Insp Rept 99900403/96-01 on 960305-08 ML20112G6711996-06-0707 June 1996 Forwards Responses to NRC Questions & Comments Re Rev 1 of GE Scaling Rept NEDC-3228P, Scaling of Sbwr Related Tests ML20117H4561996-05-22022 May 1996 Clarifies Charges for TAC M84214,GE Sbwr - RAI - Initial Test Program (Chapter 14) on Invoice XM0439-96,dtd 960429 ML20117F5711996-05-14014 May 1996 Requests That Je Leatherman Be Removed from Svc List & Rh Buchholz Be Added ML20108B8451996-04-26026 April 1996 Requests Addl Review of Repts by Nrc,Per Input Provided by Domestic & Intl Utils to Go Further than Indicated in GE 960304 & 13 Ltrs W/Efforts on Tracg Qualification for Sbwr Application.Utils,Epri & GE Desire to Meet W/Nrc on 960528 ML20101Q6961996-04-10010 April 1996 Forwards non-proprietary Apparent Tests Results (ATR) Repts for Helium Tests & tie-back Tests ML20107A4681996-04-10010 April 1996 Requests Copies of English Translations of Repts on Par, to Facilitate Sbwr Review ML20101F8871996-03-21021 March 1996 Forwards Proprietary Apparent Test Results Rept (ATR) Sys Interaction Tests (Sit).Proprietary Repts Withheld (Ref 10CFR2.790) ML20101F2981996-03-20020 March 1996 Forwards Latest Revs of Panda Project Control Plan & QA Procedures ML20101B7591996-03-14014 March 1996 Advises That GE Redirecting Focus of Simplified BWR Programs from Plants of 670 Mwe Size to Plants of 1,000 Mwe or Larger ML20101C4731996-03-14014 March 1996 Forwards Proprietary & Nonproprietary Apparent Test Results Rept for Four Helium Tests & Two tie-back Tests.Proprietary Repts Withheld Per 10CFR2.790.Affidavit Encl ML20101B7381996-03-13013 March 1996 Discusses Redirecting Focus of Sbwr Programs from 670 Mwe Size to 1,000 Mwe or Larger Size Plants Reducing Activity Level on Tracg Effort as It Applies to 670 Mwe Plant ML20101B7501996-03-12012 March 1996 Discusses Sbwr Closure of Vacuum Breaker Test Program ML20100N9301996-03-0404 March 1996 Informs That GE Redirecting Focus of Sbwr Program from Plants of 670 Mwe Size to Plants of 1,000 Mwe or Larger. Listing of Open Activities,Desired Closure Objective & Schedule Encl ML20101B8011996-02-26026 February 1996 Discusses Sbwr Re NRC Site Visit & Insp to Panda,Ansaldo & Dodewaard ML20100J0141996-02-23023 February 1996 Forwards Proprietary Sbwr Highlights & GE Slides from NRC 960215 Meeting.Encl Withheld ML20100J0321996-02-23023 February 1996 Submits non-proprietary Sbwr Highlights & GE Slides from NRC 960215 Meeting ML20097F7101996-02-15015 February 1996 Forwards Sbwr Status & Schedule 960214 & Payments Made to NRC for Last Four Yrs,In Response to Ref Telcon Requests ML20149K0521996-02-15015 February 1996 Forwards Proprietary Test Results for Giraffe Helium Tests H1 & H2.Attachment 1 to Ltr Provides List of Instruments Included on Computer Disk.Encl Withheld (Ref 10CFR2.790) ML20100G8361996-02-12012 February 1996 Forwards Proprietary Rev 1 to Topical Rept NEDE-32176P, Tracg Model Description. Rev 1 to Topical Rept NEDE-32176P Withheld ML20100J4041996-02-12012 February 1996 Transmits Proprietary Rev 1 to Licensing Technical Rept NEDE-32176P, Tracg Model Description Open Items.Encl Withheld ML20097D1631996-02-0101 February 1996 Advises That Charges on TACs M84204 & M84214 Appear Inappropriate as Review of Sbwr Ssar Chapters 4 & 14 Were Stopped Months Before 951001-951223 Period & No Chapter 4 RAIs Have Been Received ML20117P2221996-01-27027 January 1996 Forwards Final Rept Thermal Properties of Concrete at High Temps, ML20096G5611996-01-18018 January 1996 Requests Withdrawal of Proprietary Version of TRACG02V User'S Manual & Associated Affidavit ML20096B8531996-01-0909 January 1996 Forwards Proprietary Info Re Sbwr - Panthers/Ic Apparent Test Results,Per .Encl Withheld (Ref 10CFR2.790) ML20096C0641996-01-0909 January 1996 Forwards Proprietary Responses to RAIs Re Sbwr License TR NEDE-32177P (Tracg Qualification).Responses Withheld Per 10CFR2.790 ML20095J5441995-12-18018 December 1995 Forwards Rev 0 to NEDO-32288, Scaling of Sbwr Related Tests ML20095G8551995-12-13013 December 1995 Requests Removal of Westinghouse TR WCAP-14416 from Sbwr Docket Stn 52-004 ML20094Q6061995-11-29029 November 1995 Forwards Nonproprietary Handouts Presented by GE During 951128 & 29 ACRS Thermal Hydraulic Subcommittee Meeting in San Jose,Ca ML20094Q7271995-11-29029 November 1995 Forwards Proprietary GE Handouts During Meeting for 951128 & 29 ACRS Thermal & Hydraulic Subcommittee in San Jose,Ca. Handouts Withheld Per 10CFR2.790 ML20100E1251995-11-10010 November 1995 Forwards Rev 1 to NEDO-32391,Suppl 1, Sbwr Test & Analysis Program Description Suppl 1 - Discussion of Pirt Parameters ML20094Q0061995-11-0808 November 1995 Forwards non-proprietary Version of RAI on Sbwr Design, ML20094P1841995-11-0707 November 1995 Responds to NRC Re GE 950216 Request for Exemption of Sbwr Drywell to Wetwell Vacuum Breaker from Single Failure Criteria ML20094E0411995-11-0101 November 1995 Forwards Nonproprietary Version of Tracg Containment Model Road Map as Agreed to at 950821 & 22 Meeting ML20094D0651995-10-31031 October 1995 Forwards Proprietary Response to RAI Re Simplified BWR, Including Questions Q901.75-78,81,82,84-88,92,95-102,105- 127,132-143,146-150 & 152-158.Encl Withheld (Ref 10CFR2.790) ML20095B0981995-10-31031 October 1995 Addresses NRC Unresolved Items Documented in Insp Rept 99900404/95-02 ML20094E8521995-10-27027 October 1995 Forwards Nonproprietary Version of Ref 2,in Response to NRC Ref 1 Request Re Sbwr Design, ML20094E7691995-10-26026 October 1995 Informs That First & Third Noted Handouts Should Be Reclassified as non-proprietary.Second & Fourth Noted Handouts Should Continue to Be Classified as Proprietary ML20094D0361995-10-26026 October 1995 Forwards Nonproprietary Response to Rea on Licensing Topical Repts NEDE-32176P,NEDE-32177P & NEDE-32178P ML20095L7781995-10-25025 October 1995 Forwards Proprietary Panthers/Ic Apparent Test Results, Phase 1.Encl Withheld 1998-05-20
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- GENuclear Energy Geresmeme Comany 11b Curtner Avenue. kn h e, CA 35125 December 13,1993 MFN No. 226-93 Docket STN 52-004 Document Control Desk U.S. Nuclear Regulatory Commission Washington DC 20555 Attention: Richard Borchardt, Director Standardization Project Directorate
Subject:
Transmittal of Responses to NRC Questions
References:
- 1. MFN No.199-93, Docket STN 52-004
- 2. Letter, M. Malloy to P. W. Marriott," Request for Additional Information (RAI) Regarding the Simplified Boiling Water Reactor (SBWR) Design", November 26,1993 GE's responses to the questions and comments received from the Staff during the October 6, 1993, telecon were transmitted in Reference 1. Subsequent to that transmittal, Reference 2, containing different phrasing of some questions previously responded to and some questions not previously responded to, was received. The purpose of this letter is to respond to the Reference 2 letter. Attachment 1 to this letter: (a) reiterates previously transmitted responses within the Staff's numbering system for convenient identification and (b) provides responses to questions not previously answered.
Sincerely, L < >
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J. E. Leatherman SBWR Certification Manager MC-781, (408)925-2023 cc: M. Malloy, Project Manager (NRC) (2 attachments) !
Fat Eng (NRC) (1 attachment) l Gregg Galletti (NRC) (1 attachment) ;
R. Hasselberg, Project Manager (NRC) (1 attachment) l 21005.; -
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Attachment 1 to MFN No. 226-93 i 620.1 Questions: During a conference call between Nuclear Regulatory Commission and GE Nuclear Energy (GE) staffs on October 6,1993, GE indicated that it ,
intended to submit complete revisions of Section 13.2, " Training", Section 13.5, ;
" Plant Procedures" and Chapter 18, " Human Factors Engineering", of the :
SBWR Standard Safety Analysis Report (SSAR by the first week of November, ;
193. The revised submittal is expected to be very similar to the information provided in Amendment 32 of the Advanced Boiling Water Reactor (ABWR) i SSAR. Provide the SSAR revisions and include in the submittal the additional e information (detailed in Ouestions 620.2 through 620.9, below) as agreed ;
during the call.
Response: Preparation of the subject SSAR section revisions is being finalized - l and they will be transmitted in the near future. Responses to Questions 620.2 through 620.9 are listed below.
620.2 Question: In SECY-91-272," Role of Personnel and Advanced Control Rooms !
in Future Nuclear Power Plants", dated August 27,1991, the staff stated that it !
believed that the role of the operator in the passive plant control rooms would ;
he significantly different than that of operators in evolutionary plants.
Specifically, operators will use non-safety-related control systems before safety .
systems in responding to a plant event. Based on the differences in approach i to system usage, the staff believes that a fully integrated control room prototype will be needed. Please explain, in detail, why no prototype is :
proposed for the SBWR design. t Response: The NRC position taken in SECY 91-272 is that the role of the operator in the passive plant control room will be significantly different than :
that the role proposed for the operator in evolutionary plants. This position is :
based upon the tenets that (1) in the passive plants,- the operators will use non-safety-related control systems and " investment protection" systems before safety systems in responding to an event, (2) the safety systems in the passive plants are significantly different from current or evolutionary plant safety ,
systems, (3) passive plants have increased automation compared to ,
evolutionary plants and (4) passive plants have greater use of advanced ,
technology than evolutionary plants. ;
GE believes that the roles of the plant operators in the 73V/R and ABWR are essentially identical. In each type of plant, the operators will be required to monitor and control plant process parameters using non-safety-related and ,
safety-related systems to respond to transients and accidents. Each of the points raised by the Staff above will be considered below.
(1) Certain non-safety and investment protection systems are used in both .
, conventional BWRs and the ABWR before safety systems in responding to an event. For example, the Reactor Water Cleanup, Reactor Building HVAC, i Condensate Makeup Water and non-safety portions of the Residual Heat Removal systems are used during the mitigation of different events in these plants. The use of these systems in SBWR is comparable to conventional -
BWRs and the ABWR. >
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I Attachment I to MFN No. 2.6-93 2
l (2) The passive safety systems in the SBWR are different from the safety >
systems in ABWR and conventional plants in that the passive systems are ,
inherently more reliable due to their utilization of natural physical principles.
Ilowever, the passive systems are automatically initiated under certain ,
conditions and can be manually initiated under other conditions just as do the ~i conventional safety systems. The difference between the passive safety systems :
and the conventional safety systems is largely invisible to the operator. ,
Furthermore, the symptomatic emergency procedure guidelines (Appendix ;
18A) do not make any distinction in the use of safety-related vs.
non-safety-related systems, as is the case for any BWR. The operators will be I trained and instructed in the use of these proceduresjust as in presently operating BWRs. The 72-hour no operator action is a design capability, only, ,
and does not imply that the operators will take no actions for 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> after initiation of an accident event. To the contray, operators will follow the ,
SBWR EOPs as soon as EOP entry conditions occur. :
(3) The degrees of automation of plant operations in the ABWR and SBWR are essentially identical. ,
(4) The SBWR does not have any advance technology which is not used in the ABWR.
4 620.3 Question: GE stated during the conference call on October 6,1993, that it -
intended to incorporate the standard features used for the ABWR design on -
the SBWR. Justify, in detail, why the use of each standard feature previously identified for an evolutionary plant is acceptable for a passive plant, given the .
staff's position as stated in SECY-91-272. '!
Response: The standard features of the evolutionag plant main control room were developed to meet the human-system interface (HSI) design bases j described in Section 18.2 of the ABWR SSAR. The design bases for the SBWR main control room HSI (Section 18.2 of the SBWR SSAR) are identical ,
to those for the ABWR. Therefore, it is appropriate to utilize the same ;
standard HSI features. Also, refer to the response to Question 620.2. t i
620.4 Question: If computerized procedures will be implemented as part of the ;
SFWR control room design, provide as part of the SSAR, a section which includes the technical basis for selection of computerized procedures, as well as a detailed description of the planned development and verification and i validation procedures required to develop these procedures and the digital :
interface.
Resp <mse: Computerized EOPs are not discussed in the SSAR. In general, i the subjects of procedures and training are handled similarly in the SBWR SSAR as for ABWR. The inclusion of computerized EOPs in the final HSI .
desi;n t is an issue which will be dealt with by each COL applicant.
'i i
LTRlik 91-81
, i Attachment 1 to MFN No. 226-93 620.5 Question: Explain the differences in operating philosophy between active plant design which utilizes active components, such as, pumps, to mitigate an accident and a passive plant design which utilizes natural forces to mitigate an accident. Discuss how these differences will affect operator cognitive tasks and design of the human-system interfaces.
Response: GE's intent is that there be no significant difference in the operating philosophy between the ABWR and the SBWR. In both designs, the !
high degree of automation provides for enhanced operability and improved !
capacity factor, relative to conventional BWR designs. However, the extent of automation implemented in both the ABWR and SBWR has been carefully selected to ensure that the primary control of plant operations remains with ,
the control room operators. GE agrees with EPRI that the difference in the roles of the operators in the two plants is limited to the details and timing of the actions taken by them. ;
620.6 Question: Provide the task analysis used to derive the minimtun inventory of controls, displays and alarms contained in SSAR Appendix 18F.
i Response: The task analysis performed to support the development of the ;
SSAR minimum inventory consisted of completing the same fourteen point analysis agreed upon between the Staff and GE and performed to support the development of the ABWR minimum inventorylist. He results of the SBWR task analysis are available in San Jose for review.
620.7 Question: Three critical operator actions are identified in the Emergency Procedures Guidelines (EPGs). Please provide specific references to the EPG steps covering the Probabilistic Risk Assessment (PRA)-based actions, a i discussion of how the actions were identified and state whether the PRA included an analysis of Level 1,2 and 3 events. '
Response: No critical operator action were identified in the SBWR PRA. The :
SSAR discussion (Section 18F.1) of critical operator actions identified in the 3 PRA is being updated in the revised Chapter 18 the DRAFT of which will be .l fonvarded shortly. .
620.8 Question: GE has stated that the minimum set of controls, displays and alarms described in SSAR Appendix 18F includes visual display unit (VDU) and ,
divisional VDU-based items. Is it GE's intent to include only those items '
designated as " fixed-position" in the SBWR Tier 1 Design Document; i.e., in .,
the inspections, tests, analyses and acceptance criteria (ITAAC); or will the j entire minimum inventory be included in the ITAAC? !
Response: The controls, displays and alarms listed in the SBWR Tier 1 Design i Document will include only those designated as " fixed-position" in SBWR SSAR Appendix 18F. This follows the convention agreed upon between the j NRC and GE for the ABWR Tier 1 Design Document. l i
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- 3-LTRitK M41. ,
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Attachment 1 to MFN No.226-93 ,
I 620.9 Question: Identify the technical contact for the SBWR EPGs and indicate i whether the EPGs are based on Revision 4 of the BWR Owners Group ,
Guidelines. ;
t Response: The current technical lead for the SBWR EPGs is Cal Tang. Yes, ;
the SBWR EPGs are based upon Rev. 4 of the BWR Owners Group !
Guidelines. l 620.10 Question: Discuss what control barriers there will be between passive safety feature actuation and operator intervention.
i Resp <mse: Design details such as control barriers are not described in the .
SSAR. This issue of what type of barrier to implement on controls for passive safety systems will be dealt with during the detailed human-system interface ;
(HSI) design implementation process described in Appendix 18E of the SSAR. ,
62.0.11 Question: Describe the provisions for control room habitability during the i 72-hour period immediately following a design-basis accident. ,
Response: The topic of control room habitability is discussed in SSAR Section r 6.4 and the radiation exposure aspect of control room habitability is discussed ,
in the SSAR Subsection 15.6.5. For more information on this topic please i contact Earl Nichols (408-925-4288). t i
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