ML20091G903
| ML20091G903 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 12/13/1991 |
| From: | Wallace E TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9112190137 | |
| Download: ML20091G903 (6) | |
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DEC-131991 U.S. Nucinar Regulatory Commission ATTW: Document Control Desk Washington, D.C. 20555 Contlemen:.
in the Matter of
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Docket Nos.
50-259 Tennoosco Valluf Authority
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50-260
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50-296 l
EMERGEWCY RESPONSE DATA 3YSTDs (ERDS) - 1MPLEMENTATION LCUFDULE In accordance with a verbal requor,i. from the NRC Projeit Manager for Browns Ferry Nuclear plant (BFN), TVA is clarifying its orignal rouponso concerning-the operability dato for BFN Unit 2.
Alito, TVA would like to provide additional datr. concerning the installatton of redundant data links.- Enclosures 2, 4, and 5 of the original submittal dated October 28, 1991, are enclosed and havo revision barn to denoto changes.
No new commitments are contalned in this submittal.
L Sincerely.
I N
1 Qu,)
E. C.
11aco Manager Nuclear Licensing and Reg,ulatory Af(ales Encionurcs cca See pago 2 l
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U.S. Nuclear, Reg?tlatory Countesion DEC 131991 Enclosures cc (Eneionutos):
Mr. B. A. Wilson, Project Chief U.S. Nuc1 car Regulatory Coamission Region II 101 MarieLla Street, NW, Suite 2900 Atlanto, Coorgia 30323 hr. Thierry M. Ross, Project Manator U.S. Nuclear Regulatory Commlnston One White Flint, North l
115!5 Rockvillo Pike Rockyllio, Maryland 20852 NRC Resident inspector Drowns Ferry Nucicar Plant Rout, 12 P.O. Box 637 Athens, Alabama 35609-2000 Mr. John R. Jo11 coeur ERDS Project Managor U.S. Nucicar Regulatory Co!.nlosion Mall Stop MNDB 3206 Washington, D.C. 20555 7
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HNCLOSURE 2 TVA will 2.;?,ement Browns 7erry Nuclear Pinnt's (BFH) Etnergency Honponso Deta Systota (P.RDS) throJgh the Central Emorf,ency Control Conter (CECC) whlah surves as the Emergency Operations facility for BFN.
The speelfle implementation plan and scheduto for the activltles identiflod by NUREC 1394, Rev.1, for UPN re as follows:
1 1.
TVA will complete the pionned CECC computer upgrafo by pobruary 2,1992.
l The current VAX 13/150 processors will be replaced with redundant VAX 4000 processors with expanied disk and tape storato capacity.
1 2
2.
The phono line and rodem installation lo scheduled to be complet.ed by i
January 31, 1992.
This is in accordance with the NRC schedulo contained in caneric Lotter 91-14.
Phone line and modem for ERDS Will bo installed 1
in the CECC.
3.
The plant Attributo List at.1 the Data point Library will be submitted to NRC by Occcmber 2, 1991.
4.
The sof tware f or the capture and storano of the BFN data transmitted to the CECC will be dovaleped and tested by March 31, 1992.
5.
Appropriato adminlut tativo control pcocedurca will be revised and/or written and approved by August 7,1992, to onouro that NRC in notified whenovce an ERDS data point is changed. Changno to the Data point Library will be s.bmitted within 30 days of the chango.
6.
preliminary transmlusion testing of the RRDU CECC to NRC dato link will begin on June 1,1992, with completion expected beforo June 30, 1992, 1
I 7.
preliminary software testing for ERDS data t.ransmiselon will bogln on June 15, 1992, with completion orpocted before June 30, 1992.
8.
Formal nof tware tonting with the NUC cont.ractor will begin on July 1, 1992, with completion expected before July 24, 1992.
9.
Formal cystem testing with NHC. wlli begin on July. 27, 1992, with compintion expected before Aucunt 16, 1992. This schedulo is dependent upon NRC scheduling of system tosto.
10.
The appropriato proceduren for activatl#
and ndminlutration of EHDS will be revised and/or developed and will hato en effectivo date to coincide with the date ERDS in declared operational.
Theno procedures will require activation of ERDS within one hour of the declaration of an alert or higher classification.
11.
DFN Urut 2 ERDS will be operational at the completion of the fortpal system testing scheduled to be completed by A" gust' 14, 1992.
BFN KP.DJ will transmit a limited data set at this t.Lme based on data pointu available on the BFH Unit 2 Interim Safety Parameter pinplay Syntem.
As ansced to by NRC in the letter to HFN dated March 6, 1991. UFN will l
upgrado SPDS to provide additional avaltable data points to EHDS during Refueling Outage Cycle 6 and declare the SPDS operationul during operation Cycle 7.
12.
BFN Units 1 and 3 will be added to ENDS au thtso unitu preparo for restart.
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ENCt 0St'RE 4 I
TVA will implenent the Browns Ferry (BFN), pequoyah (SQN), and Watts Bar (WDN; i
Huelcar 't'lants' Emergency Responso Dat a System (ERDS) through the Central Emergency Cont. col Contor (CECC) which serves as the Emorgency Operatione i
facility for TVA nuclour sitos. This facility, located in TVA's office l
complex in Chattanooga in manned 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> a d4y.
TVA in currently replacing the existing VAX 11/750 processors with redundant VAX 4000 procons;ra.
Only 1 prococsor is required to implement the functions 7
required for the CECC including the ERDS function. The redundant processor is mair.tained in an operational standby" mode. The CECC currently han high speed data 11pl.s to the SQW Technical Support Center Data System, the PFN Unit 2 Interim Safety Parameter Display System, and the Watts Har Emergency Reoponso Fattitty Data System simulator system. The CECC also han a dato link to the Envi?'onmental Data Station computer svotems at HFN, SQN, and WBN. The data linka betwoon the operating sitou and the CECC will be made redundant.
l The high spood links that connect the CECC comput.ir system to the plant data systems are IVA owned and operated. These links will be monitored 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> a day to encuro high rollability. This arrangement has distinct advantages over systems located at the altes.
These advantages are:
1.
Itodundant procensorn 2
24-hour coverage 3.
Multipic modemo to NRC f.
Hultiple transmission lines to NRC 5.
Singlo source of date collection o.g., SPSS data and meteorological data 6.
One ulngle point to activate ERDS i
7.
Shorter lead time to implemer.t 8.
Loss software to be developed and umintained 9.
Additional operati;.5 units wlit be added with no additional EkDS i
interfaces required and 10.
Currently, the plant almulators era configured to executo exerciso and del.11 scenarlo data through the CECC computer and not the oito computern.
This data could also be transmitted to ERDS to allow more realistic NRC participallon in drilla.
The specific implementation scheduto for the activitics identit' led by NURCG 1394, Rev 1, are as follows:
1.
TVA will complete the CECC computer upgrado by February 3,1992-.
The current VA?. '11/750 proccesors will be replaced with redundant VAX 4000 l
prococcora with expanded disk und tape storage capacity.
2.
The phone line and modem installation is ocheduled to be completed by January 31. 1992.
This la in accordance with the NRC ochedule contained in Generic I ott.or 91-14.
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2a. The dat.a links from the CECC to the operating sites'(SQN and DFN) will be l-pado redundant by May 1 1992.
l 3.
The coftware for the trannmlanton of the CECr data to the NRC EHDS will be developod and tocLud by June 1, 1992.
4.
proliminary tranumission lecting of the l'.R03 CECC to NHC data link will begin on June 1, 1992. With completion expected befoto June 30, 1992, p
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pago 2 ENCLOSURE 4 S.
preliminnry software testing for ERDS data transmission will begin on June 15. 1992, with completion expected before June 30, 1992.
1 Formal software testing with the NRC contractor will begin on July 1
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1992, with completion expected before July 24, 1992.
j 7.
The ERDS hardware and software will be controlled by the CFCC softwaro Quality Assurat.co plan.
Appropelate administrativo control procedures will be revised and/or written and approvod by August 7, 1992, to requiret j
a.
proposed system modifications wt.lch could affect data communication pectoiol be submitted for NHC review in advance to encure changes are 1
compatible with ERDS, and b.
changes to the Data point !.ibrary bo subaltted to NRC within 30 days of the change.
8.
The appropriato proceduren for activation and administration of ERDS will be revised and/or developed and will have an effective dato to coincide with the dato ERDS la declared operational. Theon' procedures will require at.tivation of ERDS within one hour of tin, declara';1on of an alert j
or higher clausification.
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- 0.. Appropriato poeJonnel will be trained in the operation of the tRDS interfeco by July 30, 1992.
10 Fere41 system testing with NRC will begin on July 21, 1992, with 4
completion expneted before August 14. 1992. This schedulo !s dependent upon NRC ccheduling of system tents.
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ENCLOCURE $
1.
bFN Una
. will have an cperationut ERDS at thu time of restart.
2.
BTW Unit 2 trill have an operational ERDS with a limited data set by August 14, 1992.
3.
BFN Unl+ 2 will upgrade ERDS to provido t.dttitional avallable data points during Cycle 6 refuS11nt, outage and dociaro the SPDS operational during I
7peration Cycle 7.
I 4.
UFW Unit 3 will have an operational ERDS at the time of restart.
I S.
bQN, Units 1 and 2, will have un operational EROS by August 14, 1992.
t 6.
WBN Units 1 and 2 will have an operationni ERD 3 at the time of lic.unning.
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/. CECC will nave'au operational ERDS by August 14, 1992.
8.
The Jata ll'u;9 from the CECC to the site operating units (SQN and UFU) w!11 be mado ref.undant by May 1,1992.
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