ML19308D916
| ML19308D916 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 04/04/1974 |
| From: | FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML19308D914 | List: |
| References | |
| NUDOCS 8003200666 | |
| Download: ML19308D916 (1) | |
Text
_
15.4'.11.
Hydrculic 6nsck Supprssscra (Snubbara). Incpsetien,
Applicability Applies to. hydraulic shock suppressors (snubbers) in the 'following systems:
a.
b.
Makeup and Purification i
c.
Core Flood d.
Reactor Building Emergency Cooling e.
Reactor Building Spray f.
Main steam up to and ine.luding main str.am isolation valves.
~~
Objective To specify the frequency and type of examination which assures the continued integrity of the hydraulic snubbers.
Specification A.
Inspection will be visual.
l B.
Ten percent of the snubbers in each system will be inspected each refueling outage.
C.
Any seals found leaking will be replaced.
D.
At the end of five years, 50% of the snubbers in each system will have been inspected.
E.
At the end of 10 years,100% of the snubbers in each system will have been inspected.
0 1
F.
The results of all inspections and any action taken will be reported to the AEC Directorate of Licensing.
l Bases-f Inspection of. hydraulic shock suppressors (snubbers) in nuclear power plants has j
revealed that a large percentage of the seals were defective and that defects can
- recur, 4
t Defects have occurred when a millable gum polyurethane containing plasticizers and additives has been used as a seal in conjunction with silicone based hydraulic
- fluid. -Although these materials are not used in the Crystal River safety-related systems, inspection of all snubbers is required.
4
. References f
AEC letter to Mr. J.T. Rodgers dated December 5,1973.
seoa 2oo (cc
.