ML20084Q092
| ML20084Q092 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek, Callaway, 05000000 |
| Issue date: | 05/10/1984 |
| From: | Seiken S STANDARDIZED NUCLEAR UNIT POWER PLANT SYSTEM |
| To: | Jay Collins, James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-PT21-84-248-000 PT21-84-248, PT21-84-248-000, SDR-84-02, SDR-84-2, SLNRC-84-079, SLNRC-84-79, NUDOCS 8405210105 | |
| Download: ML20084Q092 (2) | |
Text
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SNUPPS Standardized Nuclear Unit Power Plant System 5 Choke Cherry Road Rockville, Maryland 20850 '
1301)8694010 May 10, 1984 SLNRC 84-079 FILE: 0491.10.2 SUBJ: Supplemental Significant Deficiency Report (SDR 84-02): Field Run Cables for Solenoid Valves Mr. James G. Keppler U.S. Nuclear Regulatory Commission Ngg Q
Regional Administrator, Region III n
799 Roosevelt Road
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gg i A1984
-Glen Ellyn, Illinois 60137 1
Mr. John T. Collins y_
j Regional Administrator, Region IV U.S. Nuclear Regulatory Commission L
Suite 1000, Parkway Central Plaza
. Arlington, Texas 76012 Docket Nos. STN 50-482 and STN 50-483
Reference:
SLNRC'84-065, dtd. 4/13/84: Final Significant Deficiency Report (SDR 84-02)
Gentlemen:
The reference letter provided a description of a generic deficiency
' relating to improperly rated field run cabling used to _ connect Valcor
_ supplied solenoid valves in Class lE and non-lE applications.
As indi-cated in the reference, design changes have been implemented to replace the ' field run cabling'with high temperature cabling qualified for the environment experienced in these solenoid valves. Field rework to affect the prescribed changes.is currently underway at each SNUPPS job-site >and will be completed within the time frame initially specified.
The reference letter report also indicated that other equipment would be examined'for excessive heat-rise at field termination locations and that a determination would be made whether deficiencies exist similar to
.those observed with the-Valcor valve connections. The scope of the-followup investigation included items of potential high heat' rise such as diesal generator auxiliary equipment, hydrogen recombiners, selected pump motors, packaged air conditioning units, solenoid valves (other than
-Valcor) and certain electrically operated components and equipment fur-nished by the~NSSS supplier. As a result of this investigation, similar deficiencies were identified for the following equipment:
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. _6; SLNRC-84-079 Page Two h
1).-Target Rock Solenoids: A total of 20 Target Rock solenoids furnished
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under the NSSS scope of supply for use generically in safety-related
. systems have deficiencies similar to those described in the reference letter. Actions are presently underway to rework these units, re-placing existing field cabling with qualified, high temperature wiring /
connectors. All rework will be completed at each jobsite prior to the time that these valves are required for their operational modes.
- 2) ASCO Solenoids: Two (2) ASCO solenoid valves on each of 12 condenser dump valves -(nonsafety-related) have been. identified as having under-rated cabling connections-(105*C max vs. 90*C available). The existing installation was reviewed for service at the higher; i.e. 105*C (Max),
temperature.and the conclusion reached that,'as a minimum, continued service would be. permissible at each SNdPPS plant up to the first refueling outage.
Cables for the solenoids will be replaced on a schedule commensurate with each plant's maintenance and operational
~
requirements.
In addition, one (1) ASCO solenoid valve on each of two (2) nonsafety-
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related Control, Room HVAC heating / cooling water control valves will also require rework at each SNUPPS plant.
Cables for these units will likewise be replaced on a schedule commensurate _ with each plant's maintenance and operational requirements.
- This' supplemental report closes out all items relating to the generic deficiency initially reported on behalf of the SNUPPS Utilities and should be considered the final report on.this subject.
If you have any questions regarding this matter, please do not hesitate to contact the undersigned.
Very truly yours, 4
S.
Seiken QA Manager SJS/dck/5a5-cc:
D.-F. Schnell UE G. L. Koester KGE D..T. McPhee KCPL W. S. Schum
.NRC/WC J. H. Neisler NRC/ CAL
.B.
H. Little-NRC/ CAL.
R.-C.-DeYoung.
'NRC/IE: HQ' J. ~ E. Konklin NRC/IE: III.
Record