ML14097A315
| ML14097A315 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/27/1973 |
| From: | US Atomic Energy Commission (AEC) |
| To: | |
| Shared Package | |
| ML14097A316 | List: |
| References | |
| IEB-73-03, IEB-73-3, NUDOCS 7904200086 | |
| Download: ML14097A315 (2) | |
Text
RO Bulletin No 73-3 July 27, 1973 DEFECTIV HYDRAULIC SHOCK SUPPRESSORS AND RESTRAINTS Information contained in an abnormal occurrence report fro the Millstone 1 reactor, supplemented by additional information obtained by Regulatory Operations from other licensees, revealed that 51 of 112 hydraulic, shock suppressorsad. restraints inspectedwere defecti e due to-lossof hydraulic oil supply.
These suppressors and restraints were manufactured by the Bergen-Patterson Company.
In the light of this information you are requested to take the following
'specific actions:
A IDeterine whether Bergen-Patterson hydraulic shock suppressors and Trestraints are utilized in safety systems within your facility; Report the results-of this determination to this office by noon, Monday July 30, 1973.
B.I f Bergen-Patterson suppressors and restraints are utilized in such systems:
1 Inspect prior to noon, July 30, 1973, each suppressor and restraint for proper hydraulic fluid level.
- 12.
Report by telephone to this office by noon, Monday, July 30 1973 the results of your.actionis to show:
- a. Numberof suppressors -and restraints installed in safety related systems.
- b. Number inspected.
- c. Number defective by model number and location of installation and failure mode.
- d. Confirmation of operability of defective suppressors and restraints If repairs are not completed, your justification for continuing operation of your plant and your schedule for completion of repairs.
- e.
Existing or planned surveillance schedule for suppressors 'and restraints.
rplants with existing surveillance of suppressors and restraints,
'if your inspection has been performed within-the-last 30days and there is no history of defective suppressors and restraints or if all were repaired, this.request for. inspection prior to noon July 30, 1973, does not_ apply.
C.
Reports made in response to A and B, above, should beconfirmed in writing within 10 days.
D For facilities with no Bergen-Patterson suppressors and restraints or
-ith existing surveillance inspections of suppesr ad restraints At the next reactor shutdown, inspect all hydraulic suppressors d restraints in safety related systems. Inform this office of your schedule for this inspection by noon, July 30,1973.
he the inspection is performed, if defective suppressors and restraints are identified, the 'results of your inspection should be reported immediately by telephone to this office and confirmed in writing within 10 days. This report should include:
a., Number of suppressors and restraints inspected, identified by manufacturer.
- b.
Number of defective suppressors nd-restraints.
- c. For each defective suppressor and restraint report:
(1) manufacturer (2) model number (3) location of installation (4) failure mode d
Confirmation of operability of defectire suppressors and restraints If repairs are not cowpleted, your justification for operation of your plant and your schedule for completion of repairs.
- e. Surveillance schedule.
- 3.
If no defective suppressor.s and restraints are identified a report should be submitted within 10 days of completion of the inspection to show.the number of suppressors and restraints inspected identified by* manufacturer and model numlber.
If you have any questicns concerning this request, please contact this office.