ML18030A273
| ML18030A273 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 04/28/1981 |
| From: | Curtis N PENNSYLVANIA POWER & LIGHT CO. |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| PLA-747, NUDOCS 8105060304 | |
| Download: ML18030A273 (3) | |
Text
REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:8105060304 DOC.DATE: 81/04/28 NOTARIZED:
NO DOCKET FACIL:50 387 Susquehanna Steam Electric Stationr Unit 1r Pennsylva 05003+87 50 388 Susquehanna Steam Electric Stationr Unit 2r Pennsylva O.OS'UTH.
NAME AUTHOR AFFILIATION CURT 1 St N ~ 'A ~
pennsy 1 vani a Power 8, Ligh t Co ~
RKC IP ~ iuAME RECIPIENT AFFILIATION YOUNGBLOODrR ~ J ~
l.-icensing Branch 1
SUBJECT:
Requests aporoval of Code Case 1481 ir "Klevated Temp Design of Section IIlrViv IrClass 2
L 3 Components."
Provides technical, justification.
DISTRIBUTION CODE:
BOO IS COPIES RECEIVED:LTR l.
ENCL Q SIZE: P-TITLE: PSAR/FSAR AMDTS and Related Correspondence NOTES:Send IS,E 3 copies FSAR L all
- amends, Send IRE 3 copies FSAR 8 all amends'5000387'5000388 REC IP IENT ID COOK/NAME ACTION'/D LICENSNG RUSHBROOKrM ~
INTERNAL: ACCID KVAL BR26 CHEM FNG BR Ott CORE PERF BR 10 EMKRG PREP 22 GKOSC I'KNCES 14 HYD/GEO BR 15 IRK 06 LIC QUAL BH MECH KNG BR 18 iuRC PDR 02 OP LIC BR PROC/TST REV 20 RAO ASSESS BR2?
FA- -
01 STHUCT ENG BR25 COPIES LTTR ENCL 1
1 REC IP IENT ID CODE/NAME LIC BR ¹2 BC STARKrR ~
04 AUX SYS BR.
07 CONT SYS BR 09 EFF TR SYS BR12 EQUIP QUAL BR13 HUM FAC'T FNG BR IEC SYS BR 16 LIC GUID BR NATL ENG BR 17 4IP A OE,LD POWER SYS BR 19 QA BR 21 REAC SYS BR 23 SIT ANAL BR 24 COPIES LTTR Ei>>CL 1
3 1
1 1
1 1
1 1
1 1
1 EXTERNAL: ACRS NSIC 27 05 16 1
1 1
LPDR 03 1
1 MAY 07 1%)
0 TOTAL NU'40KR OF COPIES RK4UIRt.D:
LTTR 56 ENCL 0
TWO NORTH NINTH STREET, ALLENTOWN, PA. 18101 PHONEs {215) 770-5151 NORMAN W. CURTIS Vice President-Engineering lt Ccnstructlcn-Nuclear 770.5381 April 28, 1981 Mr. B. J. Youngblood, Chief Licensing Branch No.
1 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
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SUSQUEHANNA STEAM ELECTRIC STATION REQUEST FOR APPROVAL OF CODE CASE 1481-1 ER 100450 FILE 526-M-30 PLA-747
Dear Mr. Youngblood:
This is to request approval by the NRC of Code Case 1481-1 entitled "Elevated Temperature Design of Section ZZI, Division I, Class 2 and 3
Components."
Following are the technical justifications for this request:
l.
Article ND-3600 of ASME 1II does not permit material to be used at metal and design temperatures above the allowable stress values given in Appendix Table Z-7.2.
The allowable stress data from this table is available up to 700'F.
2.
The diesel-generator exhaust system material used on Susquehanna project is SA 155-KC 70-Class 1,
ASME ZZI, Safety Class 3, Seismic Category I, 150 lb. ANSI rating and carbon steel.
The material plate specification and grade designation of SA 155 KC 70 Class 1 are SA 515 and Grade 70 respectively per ASTM Table 1 of SA 155 (1971 through 1974 Edition).
The operating and design temperatures of the diesel exhaust are 950'F and 1000'F respectively.
3.
Code Case 1481-1, approved in March 1976, allows the extension of the allowable stress values in Appendix Table Z-7.2 to higher temperatures by using the values contained within the various stress tables of ASME Section VIII, Division I.
4.
The intermittent nature of the diesel operation should preclude the carbide phase of carbon steel (SA 515) from converting into graphite, ref. Note 27 from ASME Section VIII (1971 through 1974 Edition),
Table UCS-23.
tCI CI Ci I
,Yo g05 0 ~g PENNEYIYANIA POwER A llGNY COMPANY
Mr. B. J.
Youngblood April 28, 1981 Zn view of the above technical justifications for the use of allowable stress values at elevated temperatures for the SSES diesel exhaust material and as permitted by Code Case 1481-1, PPGL hereby requests NRC approval of the use of Code Case 1481-1 for diesel generator exhaust piping on the Susquehanna Project.
Very truly yours, N.
W. Curtis Vice President-Engineering
& Construction-Nuclear RRS/mcb