L-76-186, Forwards Info Requested in 760505 Telcon Re Mechanical Snubber Failures
| ML20072S479 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 05/10/1976 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| L-76-186, NUDOCS 8304070203 | |
| Download: ML20072S479 (2) | |
Text
P O. SOX 013100, MIAMI, FLCRfDA 33101 p.-
i
.~
I FLORIDA POWER & UGHT COS.1PMu May 10, 1976 L-76-186 s
. O.h Office of Nuclear Reactor Regulation B
i 7 '.i ggp(1pg70 Attn: Mr. Victor Stello, Jr., Director Division of Operating Reactors d
'I U.
S. Nuclear Regulatory Commission f,,)#
Washington DC 20555 s
Dear Mr. Stello:
4 g
Re:
Turkey Point Plant Units 3 & 4 Docket Nos. 50-250 and 50-251 Snubbers The following information is forwarded to you in accordance with a telephone request from Don Elliott of your Staff on May 5, 1976:
Turkey Point Unit 3 1.
Seventy (70) Bergen-Paterson hydraulic snubbers were installed during the period from January 1, 1974 to December 1975, and thirty-eight (38) from December 1975, to April 1, 1976, Thirty-two (32) Bergen-Paterson hydraulic snubbers were replaced by Pacific Scientific mechanical snubbers in December 1975.
2.
Thirteen (13) Bergen-Paterson hydraulic snubbers were replaced by spare units between January 1, 1974 and April 1, 1976 because the indicated fluid level was below the required level.
The FPL inspection procedure requires replacement of the unit if the indicated level l
is "two marks" below the specified normal level.
However, the units contain sufficient excess fluid that they are normally still operable when replaced.
The j
causes for the below normal fluid levels are as follows -
i l
three (3) piston rod packings were not properly installed during the rebuilding, ten (10) had low fluid due to leakage past seals which could not be specifically identified.
3.
Thirty-two (32) Pacific Scientific mechanical snubbers were installed in December 1975.
There were no mechanical snubbers installed prior to that tbme.
There have been no failures of any mechanical snubbers.
l SNM-8304070203 760510 PDRADOCK05000g j[
S DFY 8ENT REGION H E LPIN G BUILO F600
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