ML18018B501
| ML18018B501 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 12/01/1983 |
| From: | Mcduffie M CAROLINA POWER & LIGHT CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| GL-82-14, LAP-83-556, NUDOCS 8312090207 | |
| Download: ML18018B501 (2) | |
Text
CSRK Carolina Power & Light Company
~Q 9$ )983 e COoPY SERIAL:
LAP-83-556 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT UNIT NOS.
1 AND 2 DO(KET NOS. 50-400 AND 50-401 DRAFT SAFETY EVALUATION REPORT MECHANICAL ENGINEERING BRANCH
Dear Mr. Denton:
Carolina Power
& Light Company (CP&L) hereby transmits additional information in support of our response to Draft Safety Evaluation Report Open Item 275.
This response documents the results of the meeting held on October 24, 1983 between the Nuclear Regulatory Commission and CP&L.
In accordance with the requirements set forth in Generic Letter No. 82-14, CP&L transmits one original and forty copies of this submittal.
Yours very truly, PRtGtNAL SIGNED BY, M A geDUFFIE M. A. McDuffie Senior Vice President Nuclear Generation PS/ccc (8626PSA)
CC:
Mr. B. C. Buckley (NRC)
Mr.
G. F. Maxwell (NRC-SHNPP)
Mr. J.
P. O'Heilly (NRC-RII)
Mr. Travis Payne (KUDZU)
Mr. Daniel F. Read (CHANGE/ELP)
Chapel Hill Public Library Wake County Public Library Mr. Wells Eddleman Dr. Phyllis Lotchin Mr. John D. Runkle Dr. Richard D. Wilson Mr.
G. 0. Bright (ASLB)
Dr. J.
H. Carpenter (ASLB)
Mr. J.
L. Kelley (ASLB) 411 Fayetteville Street
~ P. O. Box 1551
~ Raleigh, N. C. 27602
Shearon Harris Nuclear Power Plant Draft Safety Evaluation Report Mechanical Engineering Branch Open Item 275 What is the criteria for seismic/non-seismic interface anchors?
Response
In a meeting between the NRC staff and CP&L, CP&L agreed upon the following criteria for review of seismic/non-seismic interface anchors:
1)
CP&L willidentify all anchors that separate the seismic from the non-seismic portions of large bore piping, and for which the non-seismic portion of the pipe is not supported in the horizontal direction in accordance with the spacing recommended by ANSI B31.1 for vertical
- supports, or has heavy equipnent above it.
CP&L will demonstrate that those anchors are capable of accommodating a reaction load corresponding to yielding in the piping, or will demonstrate that the horizontal support spacing of the non-seismic portion is such that the load transmitted to the anchor from this portion does not exceed twice the load transmitted from the seismic portion or alternatively will demonstrate that the anchor is capable of accepting the actual load that would occur for the specific piping configurations.
Based on limited sampling CP&L believe all such anchors are properly designed.
2)
Seismic/non-seismic anchors on small bore piping, here defined as piping of diameter up to but excluding 6 inches, are capable of accommodating loads resulting from either portions of piping by reason of the manner in which the non-seismic portion of the piping is supported, i.e., both vertically and horizontally per ANSI 831.1 spacing.
1his spacing has been shown to result in acceptable result reactions and acceptable load on the anchors.
3)
By the same argument presented in 2) above, large bore piping which is supported both horizontally and vertically per ANSI B31.1 will transmit seismic loads from the non-seismic portion which are acceptable to the anchor.
(8626PSA/ccc)