IR 05000456/1987005
| ML20211H942 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 02/19/1987 |
| From: | Gardner R, Neisler J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20211H929 | List: |
| References | |
| 50-456-87-05, 50-456-87-5, 50-457-87-04, 50-457-87-4, NUDOCS 8702260335 | |
| Download: ML20211H942 (5) | |
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U.S. NUCLEAR REGULATORY COMMISSION
REGION III
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Reports No. 50-456/87005(DRS);50-457/87004(DRS)
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Docket Nos. 50-456; 50-457 License No. NPF-59; Construction Permit No.
CPPR-133 Licensee: Comonwealth Edison Company Post Office Box 767
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Chicago, IL 60690 Facility Narr.e: Braidwood Station, Units 1 and 2-Inspection At: Braidwood Site, Braidwood, Illinois
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Inspection Conducted: February 3-6, 1987 Inspector: John H. Neisler M
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Date Q~ U R
Ronald N. Gardner, Chief 9-M
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Plant Systems Section Date Inspection Summary Inspection on February 3-6, 1987 (Reports No. 50-456/87005(DRS);
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No. 50-457/87004(DRS))
i Areas Inspected: Routine, unannounced inspection of electrical and instrumentation systems, components, cables, terminations and panels.
Followup previously identified items (51053, 51055, 51063, 51065, 52053, l
.37051). Diesel 2A investigation and repair.
Resul ts : No violations or deviations were identified.
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8702260335 870219 PDR ADOCK 0500
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DETAILS
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1.
Persons Contacted
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Principle Licensee Employees
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- P. Barnes, Regulatory Assurance Supervisor
- K. Kofron, Production Superintendent
- T. S'imkin, Regulatory Assurance
- E. Martin, Site Quality Assurance (QA) Superintendent
- R. Kryowac, Stetion QA Superintendent
- M. Takaka, Regulatory Assurance
- E. Wendorf, PCD Electrical Supervisor
- R. Bedford, Regulatory Assurance
j M. Pacilio, PCD Electrical Engineer D. Brown, QA Superintendent, Construction i.
l J. Phelan, PCD
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L. K. Comstock Company
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M. Endicott, Quality Inspector
J. Fusenetti, Electrician
M. Hune, Quality Inspector i
T. Gornan, Quality Inspector J. Hii, Quality Control, Records M. Hintz, Quality Inspector
R. Tuite, Quality Inspector, Supervisor
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A. Fusenetti, Electrician B. Wardlow, Quality Inspector
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- Denotes those persons attending exit interview.
The inspector also contacted other persons in engineering, quality and
craft positions during the course of the inspection.
2.
Licensee Actions on Previously Identified Items
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(Closed) 10 CFR 21 Report (456/35004-PP, 457/85004-PP): Anchor / Darling
valves with Connectro NU2 nylon terminal blocks. The inspector reviewed work travelers, inspection reports and drawings used in walkdowns that
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attested to the replacement of the NU2 terminal blocks located in harsh l
environrents with either Raychem butt splices or qualified Marathon
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NUC 1612 terminal blocks. This 10 CFR 21 report is closed.
(Closed) Unresolved Item (457/85028-05): Conduits to junction box do not meet required separation. Tne inspector verified that conduit routing in Unit 2 does not violate separation requirements at the location identified
.in the Unit 1 item. The Conduit Carrying Cables AR 227 and AR 228 and
the Conduit Carrying Cables AR 229, AR 230, AR 231 and AR 232 do not enter
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the sane junction box as in Unit 1, therefore required separation is
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maintained.
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(Closed) Unresolved Item (457/85007-07): GE SIS "Vulkene" wire used in panels not qualified to IEEE 383. The licensee performed a walkdown inspection of control panels located in potentially harsh environments.
Panels with "Vulkene" wire were identified on NCR 707. The inspector reviewed documentation generated during the walkdown, surveillance reports closing NCR 707 and inspection records attesting to the replacement of the "Vulkene" wire with Rockbestos SIS "Firewall" wire qualified to IEEE 383. This item is closed.
(Closed) Severity Level 6 Violation (457/81014-02):
Failure to install required separaticn barriers between adjacent post accident monitoring indicators in Panel No. 2PM04J. The inspector's visual examination of the post accident monitoring indicators in Panel No. 2FM04J verified i
that the separation barriers have been installed.
(Closed) Open Item (456/85054-01, 457/85052-01): Electrical drawing discrepancies.
Installed fuses are 3A, drawing shows 6A. The inspector verified that drawings have been revised to show correct fuse size.
Controls are in place to assure replacement of the correct fuse and overicad when they are removed during preoperational testing. Data from preoperational testing is used as acceptance criteria for fuse sizing by
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operations. This item is closed.
(Closed) Unresolved Item (457/81014-03): Separation between cables connecting post accident monitoring pressure and level indicators inside Panel No. 2PM04J. Cables are required to be covered by metal braid.
The inspector verified by visual inspection that the cables have been covered with the required metal braid. This item is closed.
3.
Inspecticn and Enforcement Bulletins (Closed) Bulletin No. 78-04 (456/78004-BB): Environnental Qualification of certain stem mounted limit switches inside reactor containment. The licensee's architect / engineer identified 23 unqualified limit switches inside centainment and 115 unqualified limit switches in the auxiliary building including the steam tunnel. The inspector reviewed documentation that certified that all the limit switch types identified in the bulletin had been replaced with qualified NAECO EA-180 limit switches.
This bulletin is considered to be closed.
4.
Functional or Program Areas a.
Cable Installaticos: The inspector examined completed and inprocess electrical and instrumentation cable installations.
Included in the inprocess inspection was the observation of cable
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pulling in the diesel generator rocm. Activities were being performed according to approved cable installation procedures and were being continuously monitored by quality control inspectors.
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The inspector also examined completed cable installation including installation and inspection records for the following cables:
2CV006 2VA822 2VC498 2CV590 2CV004 2CV005 2CV491 2CV001 2CV548 No violations of deficiencies were observed.
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Teminations: The inspector examined completed and inprocess electrical and instrur.ent cable terminations in control panels, motor control centers and containment penetrations. The examination included the review cf quality records relative to completed terminations or control, instrument and power cables ar.d inspection of completed terminaticns in control and distribution panels. The inspector also observed electricians performing terminations at exterior containment penetration E-49 and interior terminations at containment penetration E-51.
Instructions and procedures for perfoming the terneinaticos were at the work location and were being used by the persons perforr.iing the work. A quality control inspector was present and monitoring each phase of the work as it was being accomplished.
No violations or deficiencies were observed.
c.
The inspector performed an as-built inspection of a portion of the electrical and instrumentation and control syste.ms associated with Centrifugal Charging Pump 2A. The inspection compared the physical installation of electrical and instrumentation components and wiring with the latest revision of the appropriate design drawings including component locations, cable tray and conduit, component qualificaticn, electrical and instrument terminations, and instrument tubing.
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The inspector observed welding and weld inspection activities for junction box hanger installation in the auxiliary building and the inspection of safety related conduit C0A22PB. Both activities were perforced according to appropriate procedures.
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The inspector reviewed the qualification records of those personnel whose work was included in the observation of the inprocess work activities during this inspection. Records indicated that personnel performing the activities were qulified according to the appropriate procedure codes, standards and licensee FSAR contaitments.
ho violations or deviations were identified.
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5.
Diesel Generators Diesel generator 2A test run failure. During the diesel's 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test
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run, the operators noticed an increase in the diesel's lubricating oil sump level and unusual noise from the engine. The engine was shut down immediately and the licensee began investigating the cause of the failure.
The inspector examined the diesel during the licensee's investigation and repair. Discussions with the manufacturer's representative and licensee personnel revealed that both intake and exhaust rocker arm assemblies on Cylinders No. 3 and No. 5 were broken. Acccrding to the manufacturer's representative, the rocker arn assembly failure was determined to have been caused by the seizure of the cross-head to the guides for those cylinders.
The seizure apparently was caused by insufficient clearance setting in the cross-head guides. The initial settings of 2 mil cold clearances were too close to prevent seizure when the machine had operated for an extended
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period.
Corrective action was initiated while the inspector was en site. The rocker arm assemblies were being replaced. Cross head guide clearances were increased to provide 4-6 mil clearance on all cylinders including No. 3 and No. 5.
The corrective action was being accomplished under the supervision of the diesel nanufacturer's representative-who was present in the diesel generator room during the inspection.
6.
Exit Interview Tha inspector met with licensee representatives (dencted in Paragraph 1)
at the conclusion of the inspection and sunmarized the scope and findings of the inspection.
The licensee representatives acknowledged the inspector's comments. The inspector also discussed the likely informational content of the inspection report with regard to documents or processes reviewed by the inspector during the inspection. The licensee did not identify any such documents or processes as proprietary.
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