ML19331E245
| ML19331E245 | |
| Person / Time | |
|---|---|
| Site: | Hartsville  |
| Issue date: | 08/29/1980 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NCR-HNP-A-084, NCR-HNP-A-085, NCR-HNP-A-086, NUDOCS 8009090440 | |
| Download: ML19331E245 (3) | |
Text
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374ot 400 Chestnut Street Tower II August 29, 1980 Mr. James P. O'Reilly, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region II - Suite 3100 101 Marietta Street Atlanta, Georgia 30303
Dear Mr. O'Reilly:
HARTSVILLE NUCLEAR PLANT ALL UNITS - REPORTABLE DEFICIENCY - VIRING DISCREPAUCIES ON HIGH PRESSURE CORE SPRAY COMPONENTS (NCR HNP-A-084, HNP-A-085, HNP-A-086)
Initial report of the subject deficiency was made to F. S. Cantrell and R. W. Wright on February 8, 1980. The first interim report of the subject deficiency was submitted on March 7,1980.
In compliance with paragraph 50.55(e) of 10 CFR Part 50, enclosed is the final report of the subject deficiency.
If you have any questions concerning this subject, please call Jim Domer at FTS 857-2014 Very truly yours, TENNESSEE VALLEY AUTHORITY s
7
. M. Mills, Ma ager Nuclear Regulation and Safety Enclosure cc:
Mr. Victor Stello, Director (Enclosure)
U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement
'4ashington, DC 20555 p/T S'l i
An Equal Opportunity Employer UU9090440
6 s
ENCLOSURE HARTSVILLE NUCLEAR PLANT - ALL UNITS WIRING DISCREPANCIES ON HIGH PRESSURE CORE SPPAY Cl.HPONENTS 10CFR50.55(e) REPORT NO. 2 (FINAL)
NCR'S HNP-A-084, HNP-A-085, AND HNP-A-086 On February 8, 1980, TVA informed NRC-01E Region II, Inspectors F.
S.
Cantrell and R.
W.
- Wright, of a reportable deficiency under
?0CFR50.55(e) involving wiring discrepancies in the high pressure core spray -(HPCS) diesel generator (DG) control switchgear, HPCS motor control centers, and HPCS DG air compressor skid assembly. The *dPCS DG control switchgear deficiencies were recorted separately under 10CFR21 to your office by Morrison-Knudson in a letter dated April 7, 1980. This is 'our final report on these deficiencies.
Decription of Deficiencies Wiring checks by Hartsville site personnel disclosed wiring discrepancies in the HPCS DG control switchgear (HNP-A-084), HPCS notor control centers (HNP-1.-085), and the HPCS DG air compressor skid assenbly (HNP-A-086).
These discrepancies involve wiring terminations which do not match the wiring diagrams, errors on the wiring diagrams, missing wires, mislabeling or nonlabeling of parts or terminations, and numerous examples of discrepancies between bill of materials and installed components.
The DG control switchgear was fabricated by International Controls and Switchgear, Rocky Mt.,
for Power Systems Division of Morrison-Knudson Cocipa ny (Morrison-Knudson),
Incorporated, Rocky Mt.,
North Carolina, under subcontract to GE who supplied these components to TVA as part of the NSSS package for both Hartsville and Phipps Bend Nuclear Plants.
The DG air compressor skid units were fabricated by Morrison-Knuison as part of _the GE NSSS package.
The HPCS motor control centerJ were fabricated by Powell Electrical Manufacturing Company (Powell),
Sa fety Implications The list of wiring discrepancies on each of the subject NCR's contain one or more items which could potentially prevent the conoonents from functioning as intended.-
These, conditions could have degraded the performance of the safety function of the HPCS system if the discrepancies had remained uncorrected and could have adversely affected the safety of operation of the facility.
Corrective Actions TVA performed in extensive wiring check on each item of equipment identified by.the subject NCR's and have identified all those discrepancies which would affect the operation of the components involved.
GE has evaluated these discrepancies and has approved the aporopriate documentation for rework of these components to meet the specifications and correct discrepancies in drawings or bills of
_a
o d
naterial.
In all esses the subject conponents will be reworked so that ' the wiring for each type of component is identical and the wiring matches the final as-built drawings for each.
GE and Morrison-Knudson came to the site in late March and corrected hardware problems with the DG control switchgear for which parts were available.
- However, some reolacement parts were not available at that time and will be installed as indicated belo'i.
Mecessary drawirg changes were marked at that time fo" revision later by Morrison-Knudson and/or ICS, as applicable.
Hardware corrections on all components are now being scheduled (although none of this work is critical to plant schedule because the components will not be installed for one or more years).
The hardware corrections including rewiring,, replacement of damaged components, proper labelin6 of parts or terminations, etc.,
will be completed-by January 30, 1981.
Software changes including drawing corrections and corrections to the bills of material necessary to resolve these discrepancies will be completed by June 30, 1981.
Since all wiring discrepancies have been identified, no further testing of these components will be performed at this time other than that associated with the RIS & PM program.
As a result of these deficiencies, Morrison-Knudson has removed ICS frem their authorized supplier list.
In addition they have revamped two comprehensive internal procedures involving switchgear manufacturing and inspection.
These procedures stress workmanship 4
and acceptance criteria and cover general electrical work.
Powell has indicated to TVA that since these components were fabricated (about four years ago), their QA system has under6one extensive revision and upgrading.
Revision to their OA manual, most of their QA procedures, production standards, inspection standards, and special process procedures have been implemented - in this period.
Also personnel involved have been given additional training. in the GA/00 program.
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