ML20037B374
| ML20037B374 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities, Zion  |
| Issue date: | 07/27/1973 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Brian Lee COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8009240803 | |
| Download: ML20037B374 (1) | |
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g UNITED STATES II(. e D.
ATOMIC ENERGY COMMISSION Qg DIRECTCRATE OF REGULATORY OPERATIONS y
REGION Ill
'o #%s o' "p 799 ROOSEVELT NOAD mg j
j GLEN ELLYN. ILLINOIS 60137 (312) 858-0660 l
July 27, 1973 r
Commonwealth M=== Company Docket No 1
l ATTN: Mr. Byron Lee, Jr.
Docket No.
37 i
Vice President Docket No. 50-249
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F. O. Box 767 Docket No. 50-254 N e=-a, T11 N is 60690 Docket No. 50-265 Docket No. 50-195 i,
Gentlemen l
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Tais is in confirmation of our telephone conversation of July 27, 1973, with you concerning Bergen-Fatterson hydraulic shock suppressors and restraints.
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The emelooed Esgulatory Operations Bulletin No. 73-3 is sent to you to request specific action of you concerning hydraulic shock suppressors and l
restraints. This any relate to potential defective suppressors and restraints within your facility.
If you have any questions concerning this request, please contact this office.
i Sincerely, i
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Boyce R. Grier Engional Director Emelosure:
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EO Bulletin 73-3 i
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bes: E0 Files J
DR Central Files j
FDR Local FDE OGC, Beth, 7-506A R. M. 911 chins (2) i l
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July 27,1973 4
Directorate of Regulatory Operations Bulletin 73-3 4
l DY.FECTIVE HTDEAULIC SHOCK SUFFRESSORS AMD RESTRAINTS i
Information evntat-I in an abnormal occurrence report from the Millstone 1 reactor, supplemented by additional information obtained by Regulatory Operations from other licensees, ravealed that 51 of 120 hydraulic shock l
si.ppressors sad restraints inspected were defective due to loss of hydraulic 211 supply. These suppressors and restraints were manufactured by the l
Bergen-Pattarron Company.
In the light of this information you are requested to tsks the following i
specific metions:
A.
Determine whether Bergen-Patterson hydraulie shock suppressors and 3
l restraints are utilised in safety systems within your farf14ty. Report the results of this determination to this office by noon, Monday, July 30, 1973.
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B.
If Berges-Patterson suppressors and restraints are utilized in such j
systems:
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1.
Inspect prior to noon, July 30, 1973, each suppressor and restraint i
for proper hydraulic fluid level.
2.
Report by telephone to this office by noon, Monday, July 30, i
1973 the results of your actions to show:
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s.
Number of suppressors and restraints installed in safety related systems.
b.
Number inspected.
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i c.
Number defective by model number and location of installation and failure moda.
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.
i e.
Existing or p1==nant surveillance schsdule for suppressors and i
restraints.
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3.
For plants with existing surveillance of suppresscrs and restraints, if y a r inspection has been performed within the last 30 drys l
mad there is no history of defective suppressors and restraints i
or if all were zapaired, this request for inspection prior to i
noon July 30, 1973, dosa not apply.
C.
Emw rts made in rer;cuse to A and B, above, should be confirmed 1.2 writing within 10 days.
D.
For facilities with no Bergen-Pattuson suppressors and restraints or with existing surveillance inspections of suppressors and reetraints:
1.
At the next reactor shutdown, inspect all hydrauli:: suppresscrs i
and restraints in safety related systems.
Inform this office of your scheC21e for this inspection by noon, July 30, 1973.
2.
When the inspection is performed, if defective suppressors and restrafats are identified, the results of your inspection should i
be reported irnediately by telephona to this cffica and confirmed in writing within 10 days. This report should include:
a.
Number of r' pressors and restraints inspected, identified by macafactures, l
b.
Number of defective supprsssors and restraints.
I c.
For each defective suppressor and restraint report:
j (1) manufacturer (3) model number (3) location of installation i
(4) failure mode i
d.
Confirmation of operability of defective suppressors and restraints.
{
If repairs are not completed, ycur justification for operation ot I
your plant and your schedule for completion of repairs.
e.
Surve411==>e schedula.
3.
If no defective suppressors and restraints are idectified a report should be submitted within 10 days of completion of the ingection to show the number of suppressors and restraints inspected identified j
by manufacturer and model nuabar, i
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