ML18025A644
| ML18025A644 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 09/15/1978 |
| From: | Curtis N Pennsylvania Power & Light Co |
| To: | Boyd R Office of Nuclear Reactor Regulation |
| References | |
| 841-2, ER 100450, PLA-288 | |
| Download: ML18025A644 (3) | |
Text
~~ ~
If~g REGULATORY INFORMATION DISTRIBUTION SYSTEM (RlDS>
DISTRIBUTION FQR INCOMING MATERIAL 50-3
/39 REC:
BOYD R S
ORG:
CURTIS N
W DOCDATE: 09'/15/78 NRC PA PWR
& LIGf<T DATE RCVD: 09/20/78 OOCTYPE:
LETTER NOTARIZED:
NO COPIES RECEIVED
SUBJECT:
LTR 1
ENCL 0 FURNISHING RESPONSE TO NRC LTR OF 08/11/78 CONCERNING INSTALLATION OF REACTOR PROTECTION SYSTEM PWR SUPPLIES.
PLANT NAME:SUSQUEHANNA UNIT 1
REVIEWER INITIAL:
XJM SUSQUEHANNA UNIT 2 DISTREBUTER INITIAL:~
<<4++++++++4+++++ DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS 44+++<+++++++++<<+
OTES:
vEND I&E 3CYS FSAR & ALL AMDTS FOR ACTION PSAR/FSAR AMDTS AND RELATED CORESPONDENCE
<DISTRIBUTION CODE B001)
ASST IR VASSAL'LO4+LTR ONLY< 1)
- PROJ, MINER+>LTR ONLY. (1.)
BR CHIEF LWR03 BC<+LTR ONLY'< 1)
LIC ASST LWR03 LA++LTR ONLY(1)
INTERNAL:
EG'I 4LTR, QNLY( 1 )
I & E+4LTR ONLY(2)
OPERATOR LIC BR>4LTR ONLY(i)
QAB+4LTR ONLY< 1)
MIPC>>LTR ONLY(1)
MECH ENG BR+<LTR ONLY(i)
MATERIAL ENG. BR4+LTR ONLY(2)
REACTOR SYSTEMS BR+4LTR ONLY(1)
CORE PERFORMANCE BR>+LTR ONLY(i AUXILIARYSYS BR><LTR ONLY<1)
I & C SYSTEMS BR>+LTR ONLY(1)
AD FOR SITE TECf I++LTR ONLY(5)
ACCIDENT ANALYSIS++LTR ONLY(i >
RAD ASSESSMENT BR+4LTR ONLY( 1)
GEOSCIENCES BR++LTR ONLY(1 >
NRC PDR++LTR ONLY(i>
OELD<+LTR ONLY< 1)
EMERGENCY PLAN BR++LTR ONLY(1)
DIRECTOR NRR>+LTR ONLY< 1 )
AD FOR ENG++LTR ONLY(i)
STRUCTURAL ENG BR++LTR ONLY(i)
AD FOR REAC SFTY++LTR ONLY(i)
ANALYSIS BR++LTR ONLY<i)
AD FOR PLANT SYSTEMS>+LTR ONLY(
CONTAINMENT SYSTEMS%+LTR ONLY< 1 POWER SYS BR++LTR ONLY(i)
AD FOR SITE ANLYS<+LTR ONLY< 1)
EFFLUENT TREAT SYS4+LTR ONLY(i)
KIRKWOOD++LTR ONLY< 1)
EXTERNAL:
LPDR S WILKES BARREr PA~+LTR ONLY( 1 >
TERA++LTR ONLY < 1 )
NSIC++LTR ONLY(i>
ACRS CAT B++LTR ONLY<16) 3ISTRIBUTION:
LTR 58 ENCL 0 SIZE:
1P THE END CONTROL NBR:
780880301 Mh-
PPI.L Lttt /liar j gI ~~
TWO NORTH NINTH STREET, ALLENTOWN, PA.
18101 PHONE:
(215) 821-NORMAN W. CURTIS Vice President Engineering d Construction 821-5381 September 15, 1978 Mr. Roger S. Boyd, Director Division of Project Management.
Office. of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C..
20555 SUSQUEHANNA STEAM ELECTRIC STATION REACTOR PROTECTION SYSTEM POWER SUPPLIES'R 100450 PLA-288'ILE 841-2
Dear Mr. Boyd:
In your letter of August 11,. 1978,, you requested that we install, Class lE systems; approved'y you and capabl'e of de-energizing the reactor, protection system power supplies when their output voltages exceed or fall'elow, or their output frequencies fall below limits within which the equipment being powered by. the power supplies has been designed and qualified to operate continuously and without-degradation.
We have reviewed the system design in light of your concern and believe that modifications to this system are unwarranted;
- however, in response to your requirement, we propose the addition of redundant RPS protective rel'ays and. associated.
generator output circuit breaker for each M-G set.
This equipment would be contained in a wall mounted enclosure separate from, but connected in series with. the current M-G set mounted enclosure containing simil'ar equipment.
The new equipment will be qualified to meet the NRC requirements.
General Electric has scheduled a meeting in September, 1978, to discuss this concept with you on a generic basis.
The Susquehanna FSAR can be modified in about one year to include the details of the system
- design, assuming you approve the concept.
The system will be installed prior to initial fuel loading.
Very truly yours, QQ N.
W. Curtis Vice President-Engineering 8 Construction WEB:jm 7808803D1 PENNSYLVANIA POWER IL LIGHT COMPANY Y> o
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