ML20091C183
| ML20091C183 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 05/25/1984 |
| From: | Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20091C186 | List: |
| References | |
| NUDOCS 8405300498 | |
| Download: ML20091C183 (3) | |
Text
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O PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 PHILADELPHI A, PA.19101 MAY 251984
'284'-45o2 mmm.
VfCE PRESIDEPsT EMapMas asMe Amo ness ancM Mr. A. Schwancer, Chief Docket Nos.: 50-352 Licensing aranch No. 2 50-353 Division of Licensing U.
S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Limerick Generating Station, Units 1 & 2 Additional Infcrmation for Materials Engineering Branch (MTEB) Regarding SER Confirmatory Issue #22 - Fracture Toughness of Containment Pressure Boundary
Reference:
General Design Criteria (GDC) 51 Compliance Audit for Limerick Units 1 and 2, conducted on June 24, 1983.
Enclosure:
" Acceptability of 24-Inch Class 1 Feedwater check Valves", Technical Report No.
1183-05EV, Revision 2, May 1984.
Files GOVT 1-1 (NRC)
Dear Mr. Schwencer:
We are pleased to provide the enclosed report in order to address the concerns raised by J. Italapatz (NRC/MTED) at the reference audit regarding the fracture toughness capability of the 24-inch class 1 feedwater check valves (1F074 A and B, 1F010 A and B, 2F074 A and B, 2F010 A and D).
The attached report provides documentation that these valves satisfy the acceptance criteria of GDC 51
(" Fracture Prevention of Containment Pressure Boundary")
in the following three areas:
(1) the check valve castings meet the material toughness requirements of the 1977 Summer Addenda of ASME Section III, (2) the permissible lowest service metal temperature was satinfactorily confirmed by available nil ductility transition temperature data, and h
O Ml
. e (3) brittle fractures are highly unlikely as indicated by a fracture mechanics analysis.
In addition, the material of these valves was demonstrated to be satisfactory by Charpy impact testing and by in-situ metallographic examination of the Unit i valves as described in Appendix A of the attached report.
We trust that this information will assist you in the closecut of SER confirmatory issue #22.
Sincerely, AS/~f JIIA/gra/050984950 cc:
See Attached Service List
g.
s cc: 4.idge Lawrence Brenner (w/o enclosure)
Judge Peter A. Morris (w/o enclosure)
Judge' Richard F. Cole (w/o enclosure)
Troy B. Conner, Jr., Esq.
(w/o enclosure)
Ann P. Hodgdon, Esq.
(w/o enclosure)
Mr. Frank R. Romano (w/o enclosure)
Mr.-Robert L. Anthony (w/o enclosure)
Maureen Mulligan (w/o enclosure)
Charles W. Elliott, Esq.
(w/o enclosure)
Zori G. Ferkin, Esq.
(w/o enclosure)
Mr. Thomas Gerusky (w/o enclosure)
Director, Penna. Emergency (w/o enclosure)
Management Agency Angus Inve, Esq.
(w/o enclosure)
David Wersan, Esq.
(w/o enclosure)
Robert J. Sugarman, Esq.
(w/o enclosure)
Martha W. Bush, Esq.
(w/o enclosure)
Spence W. Perry, Esq.
(w/o enclosure)
Jay M. Gutierrez, Esq.
(w/o enclosure)
Atomic Safety & Licensing Appeal Board (w/o enclosure)
Atomic Safety & Licensing Board Panel (w/o enclosure)
Docket & Service Section (w/o enclosure)
James Wiggins (w/o enclosure)
Timotny R. S. Campbell (w/o enclosure)
..I' l
/ ^
.