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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20202H8821997-12-0303 December 1997
Final Response to FOIA Request for Documents.Records in App a Being Made Available in PDR & Encl
IA-97-428, Final Response to FOIA Request for Documents.Records in App a Being Made Available in PDR & Encl1997-12-0303 December 1997
Final Response to FOIA Request for Documents.Records in App a Being Made Available in PDR & Encl
ML20202H8981997-10-27027 October 1997
FOIA Request for Listed Pages from Section 19 of General Electric ABWR Ssar
ML20210J3591997-08-11011 August 1997
Transmits Revised Fda for Us ABWR Std Design,Per App 0 of 10CFR52.FDA Allows ABWR Std Design to Be Ref in Application for Const Permit or Operating License,Per 10CFR50 or in Application for Combined License,Per 10CFR52
ML20149J7101997-07-23023 July 1997
Requests That R Simard Be Removed from Service Lists & R Bell Be Added to Svc Lists,Due to Recent NEI Reorganization
ML20148A5701997-05-0202 May 1997
Forwards Affirmation Ltr Complying W/Filing Requirements of 10CFR52.45(d) & 50.30(b) Re Application for Review of ABWR Design Control Document,Rev 4 for Design Certification
ML20196F8771997-03-28028 March 1997
Forwards Licensee ABWR Design Control Document,Rev 4 to Incorporate Changes Needed to Reflect Commission SRM Decisions & Subsequent Discussion W/Staff & to Support Ssar
ML20137G3161997-03-28028 March 1997
Forwards Rev 4 to Ge'S ABWR Design Control Document to Incorporate Changes That Are Needed to Reflect Commission SRM Decisions & Subsequent Discussions W/Staff
ML20147C1041997-01-23023 January 1997
Responds to Requesting Opportunity to Review Design Certification Rule for ABWR Before Sent to Ofc of Fr for Publication.Request Denied
ML20133A9791996-12-18018 December 1996
Approves Rules Certifying Asea Brown Boveri-Combustion Engineering Sys 80+ & General Electric Nuclear Energy Advanced Boiling Water Reactor
ML20133A9811996-12-18018 December 1996
Informs That NRC Has Approved Rules Certifying Two Evolutionary Reactor Designs:Asea Brown Boveri-Combustion Engineering Sys 80+ & GE Nuclear Energy ABWR
ML20133A9871996-12-18018 December 1996
Informs of NRC Approval of Rules Certifying Two Evolutionary Reactor Designs,Asea Brown Boveri-CE Sys 80+ & GE Nuclear Energy ABWR
ML20133A9901996-12-18018 December 1996
Informs That NRC Has Approved Asea Brown Boveri CE Sys 80+ & GE Nuclear Energy ABWR as Evolutionary Reactor Designs
ML20133B0191996-12-18018 December 1996
Informs of Approval of Rules Certifying Two Evolutionary Reactor Designs,Asea Brown Boveri-Combustion Engineering Sys 80+ & GE Nuclear Energys Advanced BWR
ML20128P4981996-09-23023 September 1996
Forwards Proposed Rule Language for 3 Design Certifications Discussed at 960827 NRC Briefing
ML20128N6001996-09-16016 September 1996
Provides Addl Info in Response to Several Questions Raised by Commission During 960827 Briefing on Design Certification Rulemaking
ML20117H3311996-08-30030 August 1996
Forwards GE ABWR Dcd,Rev 3 (Filed in Category A),Abwr Cdm, Rev 8 (Filed in Category a) & ABWR Ssar,Amend 37,Rev 9 (Filed in Category K) to Incorporate Changes Ref in 960701 & s from Jf Quirk
ML20115C0861996-07-0101 July 1996
Forwards GE Providing Background for Need for Proposed Changes to ABWR Design Control Document (Dcd), Markups Incorporating Comments Resulting from Interactions W/Nrc & DCD Markups for Addl Proposed Change
ML20115G2201996-06-10010 June 1996
Provides Comments from Two NRR Organizations on Cdm & Ssar Change Pages.Markups of DCD & Ssar Encl
ML20108D4481996-04-26026 April 1996
Responds to Staff Ltr Re ABWR DCD Change Package Which Recommends That GE Submit All Changes Identified by Foake Program.Ltr Contrary to Previous Understandings
ML20107H3241996-04-16016 April 1996
Forwards marked-up Proposed Changes to ABWR Design Description Resulting from Info Developed in Course of ABWR Engineering Program
ML20108D3111996-04-0303 April 1996
Forwards Marked Up Proposed Changes to ABWR Design Description Resulting from Info Developed in Course of ABWR First-Of-A-Kind Engineering Program
ML20101G9021996-03-22022 March 1996
Forwards Amend 36 to Rev 8 to 23A6100, ABWR Ssar & Rev 7 to 25A5447, Certified Design Matl
ML20101P1231996-03-15015 March 1996
Expresses Appreciation for Opportunity on 960308 to Brief Commission on Views on Design Certification Rules, Particularly W/Respect to Issue of Applicable Regulations
ML20092G0171995-09-15015 September 1995
Forwards Missing Pp 103-117 from Attachment B of from SR Specker on Behalf of GE Nuclear Energy Re Response to Proposed RM for Std Design Certification of Us Advanced BWR Design
LD-95-041, Forwards Response to Ocre 950812 Comment on Design Features of GE Abwr.Disagrees W/Any Suggestion That NRC Extend Favorable Consideration of Comment to Sys 80+ Std Plant Design1995-09-0505 September 1995
Forwards Response to Ocre 950812 Comment on Design Features of GE Abwr.Disagrees W/Any Suggestion That NRC Extend Favorable Consideration of Comment to Sys 80+ Std Plant Design
ML20092B6431995-09-0101 September 1995
Forwards Analysis of Ocre 950812 Supplemental Comments on Design of Abwr,Notice of Final Rule & Statement of Considerations,In Order to Ensure That NRC Has Complete Technical Info on Subj
ML20086G7981995-07-12012 July 1995
Informs of Changes to Svc List,Per Request of Jn Fox
ML20084Q0621995-05-31031 May 1995
Forwards Revised Effective Page Listing for ABWR Design Control Document
ML20078F4271995-01-26026 January 1995
Provides Info for Closure of ABWR FSER Confirmatory Item F1.2.2-2 Previously Addressed in 941222 Closure Ltr
ML20077R9141995-01-17017 January 1995
Forwards Rev 2 to ABWR Design Control Document. Rev of Design Control Document Accompanied by List of Currently Effective Pages.List Provided as Attachment 2
ML20081K9361994-12-22022 December 1994
Documents Closure of ABWR FSER Confirmatory Items
ML20080D3341994-12-22022 December 1994
Forwards Rev 1 to Advanced BWR Design Control Document
ML20077A7471994-11-23023 November 1994
Forwards Revised Fda for Us ABWR Std Design,Per App O of 10CFR52 & Notice of Issuance of Fda
ML20081K9031994-11-18018 November 1994
Forwards Rev 0 to Technical Support Document (Tsd) for ABWR & Updated ABWR Ssar App 19P Markup.Updated Version of App 19P Incorporated as Attachment a to Tsd,As Agreed During 941006 Meeting W/Nrc
ML20073M7221994-11-0404 November 1994
Forwards Proposed Rev to Section 3.8 of DCD Introduction for ABWR Re GE Meeting on 941102
ML20078E6391994-11-0101 November 1994
Forwards Description of Proposed Process for Controlling Changes to Severe Accident Evaluations & Explains Bases for Proposed Process
ML20149G9751994-10-31031 October 1994
Requests That Encl Ltrs Be Distributed to Controlled Copy of Licensee QA Program
ML20149G7081994-10-28028 October 1994
Forwards Rev 0 to ABWR Design Control Document (Dcd). DCD Comprised of Introduction,Certified Design Matl & Approved Safety Analysis Matl.Responses to NRC Comments Requested by Also Encl
ML20081K8881994-10-13013 October 1994
Maintains That Proposition That GE Be Designated in Notice of Proposed Rulemaking as Source from Which Public Could Request Copies of Design Control Document (DCD) Inappropriate.Public Should Obtain Access to DCD from NRC
ML20076F8451994-10-0505 October 1994
Responds to Re Root Cause & Corrective Measures on Unidentified Changes That Occurred in Design Control Document
ML20081K8721994-09-20020 September 1994
Requests That ABWR Final Design Approval (Fda) Be Amended to Provide for Term of 15 Years from Date of Issuance & That,As Provided in SRM on COM-SECY-95-025,FDA Be Updated as Needed to Conform to Any Changes Resulting from Certification RM
ML20149F7681994-09-0707 September 1994
Forwards Rev 0 to Advanced BWR Design Control Document
ML20072T2691994-08-30030 August 1994
Advises That Industry Intends to Comment in Opposition to Applicable Regulations Approach & Proposed Text of Applicable Regulations in Design Certification Rulemaking Proceeding for Both ABWR & Sys 80+
ML20072Q2811994-08-30030 August 1994
Submits mark-up of Previous Version of Design Control Document Introduction Together W/Typed Rev
ML20072C9821994-08-12012 August 1994
Responds to Re NRC Fee Regulations for Design Certification & Request Confirmation of Understanding of 10CFR170
ML20072E3381994-08-0909 August 1994
Requests Addition of Author Name to Svc List for Advanced BWR
ML20072A8451994-08-0303 August 1994
Forwards Chapter 21 17x22 Inch Drawings to Replace Temporary 11x17 Drawings Provided in
ML20071Q9091994-08-0202 August 1994
Forwards Ten Copies of Draft ABWR Design Control Document
ML20070H9651994-07-20020 July 1994
Forwards Rev 7 to 23A6100, ABWR Ssar, Amend 35 & Rev 6 to 25A5447, ABWR Certified Design Matl
1997-08-11
[Table view]
Category:INCOMING CORRESPONDENCE
MONTHYEARML20202H8981997-10-27027 October 1997
FOIA Request for Listed Pages from Section 19 of General Electric ABWR Ssar
ML20149J7101997-07-23023 July 1997
Requests That R Simard Be Removed from Service Lists & R Bell Be Added to Svc Lists,Due to Recent NEI Reorganization
ML20148A5701997-05-0202 May 1997
Forwards Affirmation Ltr Complying W/Filing Requirements of 10CFR52.45(d) & 50.30(b) Re Application for Review of ABWR Design Control Document,Rev 4 for Design Certification
ML20196F8771997-03-28028 March 1997
Forwards Licensee ABWR Design Control Document,Rev 4 to Incorporate Changes Needed to Reflect Commission SRM Decisions & Subsequent Discussion W/Staff & to Support Ssar
ML20137G3161997-03-28028 March 1997
Forwards Rev 4 to Ge'S ABWR Design Control Document to Incorporate Changes That Are Needed to Reflect Commission SRM Decisions & Subsequent Discussions W/Staff
ML20128P4981996-09-23023 September 1996
Forwards Proposed Rule Language for 3 Design Certifications Discussed at 960827 NRC Briefing
ML20128N6001996-09-16016 September 1996
Provides Addl Info in Response to Several Questions Raised by Commission During 960827 Briefing on Design Certification Rulemaking
ML20117H3311996-08-30030 August 1996
Forwards GE ABWR Dcd,Rev 3 (Filed in Category A),Abwr Cdm, Rev 8 (Filed in Category a) & ABWR Ssar,Amend 37,Rev 9 (Filed in Category K) to Incorporate Changes Ref in 960701 & s from Jf Quirk
ML20115C0861996-07-0101 July 1996
Forwards GE Providing Background for Need for Proposed Changes to ABWR Design Control Document (Dcd), Markups Incorporating Comments Resulting from Interactions W/Nrc & DCD Markups for Addl Proposed Change
ML20115G2201996-06-10010 June 1996
Provides Comments from Two NRR Organizations on Cdm & Ssar Change Pages.Markups of DCD & Ssar Encl
ML20108D4481996-04-26026 April 1996
Responds to Staff Ltr Re ABWR DCD Change Package Which Recommends That GE Submit All Changes Identified by Foake Program.Ltr Contrary to Previous Understandings
ML20107H3241996-04-16016 April 1996
Forwards marked-up Proposed Changes to ABWR Design Description Resulting from Info Developed in Course of ABWR Engineering Program
ML20108D3111996-04-0303 April 1996
Forwards Marked Up Proposed Changes to ABWR Design Description Resulting from Info Developed in Course of ABWR First-Of-A-Kind Engineering Program
ML20101G9021996-03-22022 March 1996
Forwards Amend 36 to Rev 8 to 23A6100, ABWR Ssar & Rev 7 to 25A5447, Certified Design Matl
ML20101P1231996-03-15015 March 1996
Expresses Appreciation for Opportunity on 960308 to Brief Commission on Views on Design Certification Rules, Particularly W/Respect to Issue of Applicable Regulations
ML20092G0171995-09-15015 September 1995
Forwards Missing Pp 103-117 from Attachment B of from SR Specker on Behalf of GE Nuclear Energy Re Response to Proposed RM for Std Design Certification of Us Advanced BWR Design
LD-95-041, Forwards Response to Ocre 950812 Comment on Design Features of GE Abwr.Disagrees W/Any Suggestion That NRC Extend Favorable Consideration of Comment to Sys 80+ Std Plant Design1995-09-0505 September 1995
Forwards Response to Ocre 950812 Comment on Design Features of GE Abwr.Disagrees W/Any Suggestion That NRC Extend Favorable Consideration of Comment to Sys 80+ Std Plant Design
ML20092B6431995-09-0101 September 1995
Forwards Analysis of Ocre 950812 Supplemental Comments on Design of Abwr,Notice of Final Rule & Statement of Considerations,In Order to Ensure That NRC Has Complete Technical Info on Subj
ML20086G7981995-07-12012 July 1995
Informs of Changes to Svc List,Per Request of Jn Fox
ML20084Q0621995-05-31031 May 1995
Forwards Revised Effective Page Listing for ABWR Design Control Document
ML20078F4271995-01-26026 January 1995
Provides Info for Closure of ABWR FSER Confirmatory Item F1.2.2-2 Previously Addressed in 941222 Closure Ltr
ML20077R9141995-01-17017 January 1995
Forwards Rev 2 to ABWR Design Control Document. Rev of Design Control Document Accompanied by List of Currently Effective Pages.List Provided as Attachment 2
ML20080D3341994-12-22022 December 1994
Forwards Rev 1 to Advanced BWR Design Control Document
ML20081K9361994-12-22022 December 1994
Documents Closure of ABWR FSER Confirmatory Items
ML20081K9031994-11-18018 November 1994
Forwards Rev 0 to Technical Support Document (Tsd) for ABWR & Updated ABWR Ssar App 19P Markup.Updated Version of App 19P Incorporated as Attachment a to Tsd,As Agreed During 941006 Meeting W/Nrc
ML20073M7221994-11-0404 November 1994
Forwards Proposed Rev to Section 3.8 of DCD Introduction for ABWR Re GE Meeting on 941102
ML20078E6391994-11-0101 November 1994
Forwards Description of Proposed Process for Controlling Changes to Severe Accident Evaluations & Explains Bases for Proposed Process
ML20149G9751994-10-31031 October 1994
Requests That Encl Ltrs Be Distributed to Controlled Copy of Licensee QA Program
ML20149G7081994-10-28028 October 1994
Forwards Rev 0 to ABWR Design Control Document (Dcd). DCD Comprised of Introduction,Certified Design Matl & Approved Safety Analysis Matl.Responses to NRC Comments Requested by Also Encl
ML20081K8881994-10-13013 October 1994
Maintains That Proposition That GE Be Designated in Notice of Proposed Rulemaking as Source from Which Public Could Request Copies of Design Control Document (DCD) Inappropriate.Public Should Obtain Access to DCD from NRC
ML20076F8451994-10-0505 October 1994
Responds to Re Root Cause & Corrective Measures on Unidentified Changes That Occurred in Design Control Document
ML20081K8721994-09-20020 September 1994
Requests That ABWR Final Design Approval (Fda) Be Amended to Provide for Term of 15 Years from Date of Issuance & That,As Provided in SRM on COM-SECY-95-025,FDA Be Updated as Needed to Conform to Any Changes Resulting from Certification RM
ML20149F7681994-09-0707 September 1994
Forwards Rev 0 to Advanced BWR Design Control Document
ML20072Q2811994-08-30030 August 1994
Submits mark-up of Previous Version of Design Control Document Introduction Together W/Typed Rev
ML20072T2691994-08-30030 August 1994
Advises That Industry Intends to Comment in Opposition to Applicable Regulations Approach & Proposed Text of Applicable Regulations in Design Certification Rulemaking Proceeding for Both ABWR & Sys 80+
ML20072C9821994-08-12012 August 1994
Responds to Re NRC Fee Regulations for Design Certification & Request Confirmation of Understanding of 10CFR170
ML20072E3381994-08-0909 August 1994
Requests Addition of Author Name to Svc List for Advanced BWR
ML20072A8451994-08-0303 August 1994
Forwards Chapter 21 17x22 Inch Drawings to Replace Temporary 11x17 Drawings Provided in
ML20071Q9091994-08-0202 August 1994
Forwards Ten Copies of Draft ABWR Design Control Document
ML20070H9651994-07-20020 July 1994
Forwards Rev 7 to 23A6100, ABWR Ssar, Amend 35 & Rev 6 to 25A5447, ABWR Certified Design Matl
ML20070D9381994-07-12012 July 1994
Forwards D-RAP Design Description & ITAAC for Inclusion in Section 3.6 of Cdm & Cdm & Ssar Markups Addressing Minor Corrections
ML20069Q3001994-06-23023 June 1994
Forwards Rev 6 for Ssar Amend 35 & Rev 5 for Certified Design Matl
ML20070E1981994-06-0808 June 1994
Forwards Ssar Markup Indicating Applicable Edtion to UBC, AISI SG-673 & NEMA FB1 to ABWR Ssar.Changes Will Be Included in Amend 35 Mod Package.Notifies That Applicable Edition of Bechtel Rept BC-TOP-3-A Is Rev 3
ML20070E1891994-06-0808 June 1994
Forwards Ssar Markup of Section 1A.2.34 Which Responds to TMI Item III.D.1(1).Mod Makes Section Consistent W/Ts 5.5.2.2.Change Will Be Included in Amend 35 Mod Package Scheduled for Distribution Later This Month
ML20070D9331994-05-26026 May 1994
Forwards Results of Analyses to Assess Impact of Drywell Spray Actuation Following LOCA to Ensure Bounding Scenario
ML20069H2101994-05-25025 May 1994
Forwards 25A5447,Rev 4, ABWR Certified Design Matl & Nonproprietary & Proprietary Version of 23A6100,Rev 5, ABWR Ssar. Proprietary Version of Ssar Withheld
ML20069G9301994-05-25025 May 1994
Submits non-proprietary Ssar Amend 35 & Certified Design Material Rev 4 to Listed NRR Recipients
ML20069B1831994-05-25025 May 1994
Resubmits Affidavit for GE Abwr,Proprietary Info Section 18H, Supporting Analysis for Emergency Control Operation Info
ML20069A7371994-05-20020 May 1994
Forwards Proprietary Ssar Sections 11A.2 & 11A.4 to Specified NRR Recipients Listed on Attachment 1.Encl Withheld
ML20029D4211994-04-29029 April 1994
Forwards Revised Ssar Markups Responding to Commitments Made at 940415 Meeting in Rockville,Md,Including Addl Info Reflecting Locking Mechanisms of Subassemblies & European Experience & Finalized TS for CRD Removal - Refueling
1997-07-23
[Table view] |
Text
. . . . . , - . . _ _ _ . . . ._
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(
. GENuclearEnergy
. GeneralElectric Company 175 Curtner Avenue, San Jose, CA 9512S June 24,1993 Docket No. STN 52-001 Chet Poslusny, Senior Project Manager Standardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation
Subject:
Submittal Supporting Accelerated ABWR Schedule - Plant Systems Branch Information
Dear Chet:
Enclosed is a SSAR markup of Subsection 9.4.6 which should have been included in my letter dated June 23,1993.
Please provide a copy of this transmittal to Chandra.
Sincerely, ack Fox Advanced Reactor Programs cc: Alan Beard (GE)
Gary Ehlert (GE) /l?
Norman Fletcher (DOE) i .!
Morry Manson (GE)
Nabe Totah (GE) g dg.
A JSS I-p fh' Q60 '
,&, I lt l 2800GG 9306300046 930624..
l
( PDR ADOCK 05200001 A PDR.
l ABWR 23A6100AH wn Standard Plant 9.4.6 Radwaste Building HVAC System system. The air-conditioning system is a unit air-conditioner consisting of a water-cooled condenser, 9.4.6.1 Design Bases compressor, cooling coil, heating coil, filters and fan.
Outdoor air and recirculating air are mixed and drawn 9.4.6.1.1 Safety Design Bases through a prefilter, a heating coil, a cooling coil, and two 100% supply fans. One fan is normally operating The radwaste building HVAC system has no and the other fan is onstandby. A pressure differential !
safety-related function as defined in Section 3.2. controller regulates the exfiltration from the control Failure of the system does not compromise any room to maintain it at a positive static pressure, safety-related system or component and does not preventing airborne contamination from entering.
prevent safe reactor shutdown. Provisions are incorporated to minimize release of radioactive The exhaust air system consists of two 100% exhaust .
substances to atmosphere and to prevent operator fans. One fan is normally operating and the other is l exposure. The radwaste building HVAC P&ID is on standby Exhaust air from the control room is vt44 shown in Figure 9.4-10. mc;I:c :d fc :.hbe-e rad iemiviij Lcie.c d ='ing !
to the atmosphere.
9.4.6.1.2 Power Generation Design Bases 1 9.4.6.2.2 Radwaste Building HVAC Control System The radwaste building ventilation nystem is designed to provide an environment with controlled The HVAC control system for the remainder of the
' temperature and airflow patterns to insur: both the radwaste buildingis a once-through type. Outdoor air comfort and safety of plant personneh and the is filtered, tempered and delivered to the integrity of equipment and components. The noncontaminated areas of the building. The supply air radwaste building is divided into two zoses for air system consists of a prefilter, beating coil, cooling coil, ese zones and two 100% supply fans. One fan is normally conditioning and ventilation purposes. plance are the radwaste control room and the ba operatingof the and the other fan is on standby. The supply radwaste building. I fan furnishes conditioned air through ductwork and j diffusers, or registers to the work areas of the building.
A positive static pressure with regpect to the Zone preheat coils installed in the supply air ductwork osphe provide temperature control. Air from the work areas balance maintained ofinthe thebuilding radwasteand to atm[ room.re control The isexhausted through the tank and pump rooms. Thus, is balance of the radwaste building is ma ntained at a the overall airflow pattern is from the least potentially negative static pressure with respect to atmosphere. contaminated areas to the most contaminated areas.
The system design is based on outtoor summer h The exhaust air system consists of two 100% exhaust i maximum of 115 F. Summer indoor tpmperatures y fans, one normally operating and one on standby. 1 include 75 F in the radwaste control st 'on,90 Fing Exhaust air from thep!!:, ~me 11?*.+eems,-el-operating areas and corridors, a maximum w rm'a"ac~ ~ 'M mi%
d 7:; 3:;: c E temperature of104 Fin areas that may occupied nmonitored for airborne radioactivity. U^ --
and 110 F in the equipment cells. Wi ter indoor ccch Mi n: -taminatin, nn mt e: ciao.
design temperatures include 60 F in pied areas, in 'b wre M ::i: ^'" rprer: !- the 57=5 is 70 F in the radwaste control room and F in the = = int ain 'i E::h-ef the :.bersreted specce is A ;
equipment cells3based on an outdo r design sepmtely mnnienrd A high level of radioactivity l temperature of-40 F. activates an alarm in the main control room, )
_:i- M :::=!;i im., .'~ . feed :7:::. The j 9.4.6.2 System Description exhaust air is ci. ::d through the main plant stack. l
- v. M l 9.4.6.2.1 Radwaste Building Control Room Heating, cooling and pressurization of the contro "" * " '" 4 , i room are accomplished by an air-conditioning /b osca AuA l j94'u' u a& &l **" 1 Amendment 29 d, myf G(w ** g/ gJi.
9.4-2j h 4 *'
'4 M + -9 .
\\ c/w A> k bA l
I j' '
l
+
ABM ux61oorn wa )
Etandard Plant 9.4.63 Safety Evaluation building are started manually. The fan inlet dampers open when the fan is started. A flow switch installed l in the exhaust fan discharge duct actuates an alarm on Although the HVAC system is not safety-related as l
! defined in Section 3.2, several features are provided indication of fan failure in the main and radwaste .
l to insure safe operation. A completely separate control rooms and automatically starts standby fan. l h HVAC System is provided for the control room. The exhaust fan is interlocked with the supply fan to Pressure control fans for radwaste areas are prevent the supply fan from operating if the exhaust
! redundant, with provision for automatic start of the fan is shutdown.
l standby unit. Radiation detectors and isolation dampers are provided to permit isolation and Two pressure indicating controllers modulates containment of any radioactive leakage. variable inlet damper vanes in the supply fan to l
maintain the area at a negative static pressure with 9.4.6.4 Tests and Inspections respect to atmosphere. 'lle switch causes an alarm to be actuated if the negative pressure falls below the The system is designed to permit periodic preset timit.
l inspection of important components, such as fans, motors, belts, coils, filters, ductwork, piping and Differential pressure indicators measure the l
valves, to assure the integrity and capability of the pressure drop across the filter section. The switch l l causes an alarm to be actuated if the pressure drop l
system. Local display and/or indicating devices are i provided for periodic inspection of vital parameters exceeds the preset limit.
- such as room temperature, and test connections are
(\r l provided in exhaust filter trains and piping for periodic checking of air and water flows for @"
conformance to the design requirements. Portable Radiation mo itors are installed in the radwaste test and monitoring equipment is available to building A high radiation signalin the vent i
balance the system when required. causes Bh : ~mming alar " an nwwe alarm to annunciate in the main control roomW = WM alarm soundieg-and :-d!:p!g !!gh 2L% virThe rah:c building-H .C svi pael. In addition, &j p the branch high radiation signal automatically closes a /#
the branch-isolating damper so that air conditioning is continued in the balance of the building. I' 9.4.6.5 Instrumentation Application 9.4.6.5.1 Radwaste Building Control Room If the vent high radiation alarm continues t ,
annunciate, the work area branch ducts are manuall The air. conditioning unit for the control room is isolated selectively to locate the affected buildin /2dh started manually. A temperature indicating area. Should this technique fail, because the airborn controller modulates the air conditioning system via radiation has generally spread throughout th y#
a three way hot water salve to maintain space , building, control room air conditioning continug V conditions. A differential pressure indicating Io rating. However, the air conditioning for th for controller modulates dampers in the return air the) balance of the buildingis shut down. The opera-ductwork and the room damper to maintain the tors, using approved plant health physics procedures, positive static room pressure. Differential pressure then enter the work areas to locate and isolate the indicators measure the pressure drop across the filter leakage source.
bank.
The supply and exhaust air ductwork have manually l balancing dampers provided in the branch ducts for i balancing purposes. The dampers are locked in place j after the system is balanced.
9.4.6.5.2 Radwaste BuildingWork Areas The air exhaust and supply fans for the radwaste l
9 4 2k Amendment 17