ML17174A569
| ML17174A569 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 10/22/1980 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Abel J COMMONWEALTH EDISON CO. |
| References | |
| TASK-07-01.A, TASK-7-1.A, TASK-RR NUDOCS 8012110023 | |
| Download: ML17174A569 (4) | |
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Docket File NRC PDR L PDR Docket No. 50-237 TERA JRoe SX~ NSIC DCrutchfield ORB#5 Rdg
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- - IE-3 Gla inas OELD OCTOBER Mr. J~ Abel TNovak
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Director of Nuclear Licensing, *~~~!.}.
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Corrancinwealth Edison Comp(iny,:.:..... ~,*~*-.,.,,.*,~.. *~"-*'"""'"- * "*,*,... -.
P. 0. Box 767
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Chicago. I111.noi s 60690
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pear Mr. Abel:
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. ~RE:. SEP TOPIC VII-1.A ISOLAtiQN.... OF.. R~~TQB. PBQT~~:qo~... sysr~~~-FROM NQf'JilO... -*._.
SAFETY, INCLUDING QUALIFICATION OF ISOLATION.DEVICES
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v Dresden Nuclear. Power Station, Un.it No~ 2.
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We are continuing our revi*ew of.S{iP ~op!~.,YP: l.~.. and ~~v~ foun~ tha~
additional information as described an the enclosure to this letter is needed.
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We request your response w1tflfo*go days of your receipt of this letter.
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Enclosure:
Request for* Additional lnfonnati on cc w/enclosure:.
- See next page
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... * :Gus c. La1nas, Assistant Director..
.for Safety* Assessment
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- Division of Licensing
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DATE*1*.......*............ :..... *:............................. :...... P................ ;.....................................
- NRC FORM 3.18 (9*76) NRCM 021+0.
Uu.s. GOVERNMENT PRtNTING'OFFICE: 1979.289*369
UNITED STATES NUCLEAR REGULATORY COMMISSION
- WASHINGTON, D. C. 20555 Docket No. 50-237 Mr. J. S. Abe 1 Director of Nuclear Licensing Conmonwealth Edison Company P. 0. Box 767 Chicago, Illinois 60690
Dear Mr. Abel:
October 22, 1980.
RE:
SEP TOPIC VII-1.A ISOLATION OF REACTOR PROTECTION SYSTEM FROM NON SAFETY,* INCLUDING QUALi FI CATION OF ISOLATION DEVICES
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Dresden Nuclear Power Station, Unit No. 2 We are continuing our review of SEP Topic VII~l.A and have found that additional information as described in the enclosure to this letter is needed.
We request your response within 90 days of your rec~ipt of this letter.
Enclosure:
Request for Additional Information
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See next page Si~cerely,.
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Gus C. Lainasl Assistan for Safety Assessment Division of Licensing
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- Mr~.J. '.S. Abel
- ,,l' cc I sham_, 'L\\i ncoa 1n.& *Beale
'C*ounselors at Law
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One,f<<irs.f:Nati ona ~ P~ aza, 42nd :fl o*or
- Chicago, I.l H1nois. 60603
~Mr. :s. ;B. ;Stephenson
- Plant :Sup*eri:n'tendent
!Dresden Nuciear *Power Station
'Ruta l Route # l Morrls, 'I l lir'loi s
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Natu.ral Resources* Defense t'ounci 1
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20005 U. S. Nuclear *Regu'l'atory Coilwni ssion Resident 1 nspectors Off ice : *
~r~sden Station 1RR *#1 Mof;ri *s ~ :.H llnoi s 60450 1
.1 Susan N. Sekuler Assistant*Attorney General
- Enviro.nmental :Control D.iVision*
isa.w*.- *Randolph Street Suite 23'15
- Chicago. Illinois
~0601.*
- Morris P'-'blic Library
- 604 Liberty Street Mofri s, 111 i noi s 60451 chairman
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Bo~rd :of Superv.isors of Grundy *county Grundy County Courthouse Mo~ris, Illinois 60450 jo~n f'. Wolfe, Esquire 3409 Shepherd Street Ch~vy Chase, Maryland 20015
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1 Linda w. Little 500 Hermitage Drive Raieigh, North Carolina 21t12
!Ii October 22.; 1980 Department of Public ~ealth ATTN~ Chief, Di*1sion of Nuclear Safety 53'5 West Jeffers*on Springfield, Illinois 62761 Director; Technical Assessment DiVision Off 1 ce of Ra di at'i on Programs (AW-459)
- u. S. Environmeii'tal Protecti'on
- 6.gency
- Crystal Mall #2 '
Arlington, Virginia 20460 J;~ S. Envi ronme.ntal Pr~tection
- Agency Federal Activities Branch Region V Office ATTN:
EIS COOROINATOR 230 South Dea.rborn. Street Ch;cago, Illinois 60604 D~~ Forrest J. Rem;ck 305 East Hamilton Avenue State College, Pennsylvania 16801
REQUEST DRESDEN FOR AD.TIONA~
UNIT 2 FOR SEP INFORMATION ON TOPIC VII-1.A The FSAR does not contain sufficient information for us to review the degree of isolation between the nuclear instrumentation CNI> and non-safety syste*s receiving NI signals. Therefore, please provide the following *additional information:
(1) List all parameters and systems that interface between the safety and non-safety systems.
C2) Identlfy the type of transmission Ci.e.
a~alc3. digital, electric, optic, etc.>
invol~ed with each interface that is identified in response to Part C1) above.
<3) Identify the type of isolation device that defines the Class 1E boundary for each interface identified in response to Part (1) above.
(4) Provide the acceptance criteria for each isolation de11ice identified in response to Part C3) above.
(5l Describe the type of testing that ~as conducted on the isolation devices to insure adequate protection against exceeding the voltage and current limits
~pecified in Part (4) above.
(6} Describe the qualification test plans and provide the test results for each isolator iden~i7ied in response to Part (3) above.
(7) Provide the electrical schematics and wiring diagrams for each type of isolation device used.
t Enclosure
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