ML20210G579
| ML20210G579 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 03/28/1986 |
| From: | Danielson D, Yin I NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20210G569 | List: |
| References | |
| 50-295-86-09, 50-295-86-9, 50-304-86-08, 50-304-86-8, IEB-79-07, IEB-79-7, IEB-81-01, IEB-81-1, NUDOCS 8604020549 | |
| Download: ML20210G579 (4) | |
See also: IR 05000295/1986009
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U.S. NUCLEAR REGULATORY COMISSION
REGION III
Reports No. 50-295/86009(DRS); 50-304/86008(DRS)
Docket Nos. 50-295; 50-304
Licensee:
Commonwealth Edison Company
P.O. Box 767
Chicago, IL 60690
Facility Namei
Zion Station, Units 1 and 2-
Inspection At:
Zion site, Zion, IL
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Inspection Conducted:
March 20-21, 1986
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Inspector:
I. T. Yin
Date
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3 )2 # d
Approved By:
D. H. Danielson, Chief
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Materials and Processes Section
Date
Inspection Summary
Inspection'on March 20-21, 1986 (Reports No. 50-295/86009(DRS);
No. 50-304/86008(DRS))
Areas Inspected:
Routine, announced inspection of snubber inservice-inspection
and testing; licensee actions on previously identified items, and licensee
actions in response to IE Bulletins 79-07 and 81-01.
Results: No violations or deviations were identified.
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8604020549 B.'.0328
ADOCM 05000295
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DETAILS
1.
Persons Contacted
Commonwealth Edison Company (Ceco)
- C. Schultz, Regulatory Assurance Supervisor
- R.
Lane, Technical Staff
- W.
Reecher, Technical Staff
- T. Rieck, Services Superintendent
- W. Stone, QA Supervisor
USNRC - Region III (RIII)
- M. Holzmer, Senior Resident Inspector
- Denotes those attending the management exit meeting on March 21, 1986 at
the site.
2.
Licensee Action on Previous Identified Items
(Closed) Unresolved Item (304/79-02-02):
Snubber VC279-S2 was welded to
a leak chase structure, the reservoir for Snubber VC279-S7 was mounted on
the side of the cylinder, and there were several small snubbers with leaks
at the adjustment screw seals.
Based on a review of related records and
other-documentation and on examination of a the photograph that was taken
at the location, the corrective actions taken to resolve this unresolved
item were considered adequate.
The site SNED staff verified the snubber
correction conditions in August 1985.
(Closed) Unresolved. Item (304/79-02-03): .The licensee committed to
evaluate the difference in the steam generator snubber (SGS) cold
position settings (CPSs).
The NRC inspector reviewed the following
correspondence that addresses this evaluation:
Zion-Station Superintendent letter to SNED, " Unit 2 Steam Generator
Snubbers,"' dated April 23, 1979.
S&L letter to CECO, " Steam Generator Snubbers," dated February 15,
1980.
S&L letter to CECO, " Steam Generator Snubbers," dated March 19, 1986.
Based on his review of these documents the NRC inspector has no further
questions.
(Closed) Unresolved Item (304/81-24-01):
Follow up on the snubber
overhaul program to replace all seals for ITT-Grinnel hydraulic snubbers.
The snubber seal overhaul program was completed in the Fall of 1985.
The proper fluid reservoir positions were verified by CECO SNED staff in
August 1985.
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(Closed) Unresolved Item (304/81-24-02):
Licensee actions to revise the
snubber Technical ' Specification (TS) in response to NRC-NRR generic
letter, dated November 20, 1980.
On June 28, 1985 the licensee submitted
to the NRR the proposed TS amendment that addresses snubber surveillance
and testings for both mechanical and hydraulic snubbers.
The TS changes
became effective January 22, 1986.
The NRC inspector reviewed the
affected TS Sections (3.22, 4.22 and 6.5) and had no adverse comments.
The TS amendment will be implemented for Unit I during Summer 1986
refueling outage.
(Closed) Unresolved Item (295/82-29-01; 304/82-26-01):
The licensee
agreed to evaluate snubbers with little or no thermal displacements for
possible replacement with rigid restraints. The NRC inspector reviewed
the Stone and Webster (S&W) Engineering Corporation letter to Ceco,
No. ZPS-283, " List of Snubbers with Thermal Movement 1/8" or Less," dated
March 15, 1983, and had no adverse comments.
CECO SNED has reviewed the
S&W 1etter and is considering the replacement of some snubbers in the
future.
3.
Licensee Actions on IE Bulletins
(Closed) IE Bulletin 79-07 (205/79-07-BB; 304/79-07-BB):
" Seismic Stress
Analysis of Safety-Related Piping," dated April 14, 1979.
The bulletin
requested the licensees to verify that appropriate load combination
methods had been utilized in the piping stress analysis computer
programs.
The following CECO letters were submitted to RIII:
" Response to IE Bulletin 79-07," dated April 24, 1979.
" Additional Information on IE Bulletin 79-07," dated July 10, 1979.
Based on the NRC staff's review of the above documents and RIII followup
on the piping analyses performed in response to IE Bulletin 79-14, the
NRC inspector concluded that CECO had taken adequate measures to resolve
this bulletin.
(Closed) IE Bulletin 81-01 (295/81-01-BB; 304/81-01-8B):
" Surveillance
of Mechanical Snubbers," dated January 27, 1981.
The NRC inspector
reviewed the following CECO letters to RIII:
" Response to IE Bulletin 81-01, Revision 1, Item 4," dated June 9,
1981.
" Response to IE Bulletin 81-01, Revision 1, Item 4," dated
January 14, 1982.
The CECO letters stated that all 29 Pacific Scientific Company PSA
mechanical snubbers installed in Zion Unit 1, and all 47 PSA mechanical
snubbers installed in Zion Unit 2 were visually inspected and manually
stroke tested.
No deficiencies were identified.
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4.
Snubber Inservice Inspection
The NRC inspector reviewed the records from the Zion Unit 2 snubber
inspection an~d tests conducted during the plant refueling outage in the
Fall of 1985.
The snubber. inspection and testing requirements are stated
in TSS 15.6.48, " Hydraulic and Mechanical Snubber Surveillance," Revision 4,
da~ted April 25, 1984.
The following records were reviewed:
. Hydraulic Shock and Sway Suppressor Test Record, dated September 24
through December 2, 1985.
Mechanical Snubber Surveillance Procedure Inspection Data Sheet,
dated October 24, 1985.
Unit 2 Steam Generator Snubber Inspection, dated September 18, 1985.
Snubber Surveillance Procedure Inspection Data Sheet Supplement,
dated December 10, 1985.
Hydraulic Snubber Surveillance Procedure Inspection Data Sheet,
dated December 16, 1985.
No violations or deviations were identified as a result of the review.
5.
Exit Interview
The NRC inspector met with licensee representatives (denoted in. Paragraph 1)
at the conclusion of the inspection.
The inspector summarized'the scope
and findings of the inspection.
The inspector also discussed the likely
informational _ content of the inspection report with regard to documents
reviewed by the inspector during the inspection.
The licensee representa-
tives did not identify any such documents as proprietary.
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