ML18030A256
| ML18030A256 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 04/15/1981 |
| From: | Curtis N PENNSYLVANIA POWER & LIGHT CO. |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| PLA-703, NUDOCS 8104170431 | |
| Download: ML18030A256 (3) | |
Text
ACCESSION NbR:8104170431 OUC ~ DATE: 81/04/15 NOTARIZED'O rACIL:50-3'"7 Susquehanna Steam Electric Station~
Unit 1I "ennsylva 50 388 Susquehanna Steam Flectric Station~
iJni c 2g Pennsylva A U Tri ~ iN AHE AIJTHOR AFFILlATIO~
CURT I S i N ~ '~ ~
Pennsylvania Power 8, Light Co.
RE,C I P ~ TAHE
<ECIP<tl'I err j,LiAi ION YOUNGBLOODiB.J.
Licensing Branch 1
DOCKET p%000387 vvv4 SIZE:
SUBJECT:
Responds to NHC concerns re electrical isolation designs for Circuits 85,Boio9
~
103 in rSAR Tavle o ~ 1"2'grees to accop one of sugqesteu options to resolve isolation for Circuits 85 8 86.Remaining circuit." are being evaluated, DISTRIBUTION CODE:
B001S COPIES RECEIYED:LTR ENCL TITLE: PSAR/FSAR AHOTS and Related Correspondence NOTES:Send IKE 3 copies FSAR 8 all amends.
Send IEE 3 copies FSAR 8, all amends.
0500038m 05000388 RECIPIENT ID CODE/NAME ACTION; A/D LICENSNG RUSHBROOKpM ~
INTERNAL: ACCID EYAL BR26 CHEM ENG BR 08 CORE PERF BR 10 EHERG PREP 22 GEOSC IENCES 14 HYD/GEO BR 15 I8E 06 LIC QUAL BR HECH ENG BR 18 NRC PDR 02 OP LIC BR PROC/TST REY 20 RA~0 BESS BR22 86~+
01 S
1 RECIPIENT ID CODE/NAHE YOUNGBLOODeB STARKrR ~
04 AUX SYS BR 07 CONT SYS BR 09 EFF TR SYS BR12 FAUlP QUAL BR13 HUH FACT ENG BP IS,C SYS BR 16 LIC GUID BR MATL ENG BR 17 HPA OELD POWER SYS BR 19 QA BR 21 REAC SYS BR 23 SIT ANAI. BR 24 SYS INTERAC BR
,COPIES LTTR ENC 1
1 LPDR 03 TOTAL NUMBER OF COPIES REQUIRED:
LTTR 57 ENCL
TWO NORTH NINTH STREET, ALLENTOWN, PA. 18101 PHONEr (215) 770 5151 NORMAN W. CURTIS Vice presidenr. Engineering 8 Constrccrion-Ncc!ear 770 5381 Mr. B. J.
Youngblood, Chief Licensing Projects Branch 81 Division of Project and Management U. S. Nuclear Regulatory Commission Washington, D.
C.
20555 April 15, 1981 Susquehanna Steam Electric Station Docket Nos.
50-387 and 50-388 Non-Class IE Loads on Class IE power System ER 100450 File 841-2 PLA-703
Dear Mr. Youngblood:
Pennsylvania Power and Light Co.
has reviewed the NRC's concerns relative to the electrical isolation designs for circuits 85, 86, 89 and 103 in table 8.1-2 of the FSAR.
We agree to accept one of the three suggested options to resolve isolation for circuits 85 and 86, PP8L is evaluating circuits 89 and 103 to determine if they should be reclassified as class 1E. If not feasible, PP8L will apply one of the three options to provide acceptable isolation.
These options are as follows:
1)
The addition of another circuit breaker fully coordinated with the existing breaker and periodically tested for verification.
2) the use of a safety injection actuation signal to automatically 'trip the load.
3) the use of a shunt trip device, for the breaker such that this trip would not be subject to the direct thermal and magnetic effects of any large magnitude (e.g.,
short circuit) fault current.
8104170481 PENNSYLVANIA POWER 8
LIGHT COMPANY
B. J.
Youngblood, Chief April 15, 1981 Page two The modified design
~chill be installed prior to fuel load.
Very truly yours, N.
W. Curtis Yice President-Engineering and construction-Nuclear cc:
R.
H. Stark bcc:
N.
W. Curtis W.
E. Barberich 8.
A. Snapp C. T. Coddington R. J. Shovlin