IR 05000423/1982005
| ML20053A730 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 05/12/1982 |
| From: | Beckman D, Finkel A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20053A726 | List: |
| References | |
| 50-423-82-05, 50-423-82-5, NUDOCS 8205270209 | |
| Download: ML20053A730 (5) | |
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U. S. NUCLEAR REGULATORY COMMISSION Region I Report No. 50-423/82-05 Docket No. 50-423 License No. CPPR-113 Priority Category A
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Licensee:
Northeast Nuclear inergy Company P. O. Box 270 Hartford, Connecticut 06101 Facility Name:
Millstone Nuclear Power Station, Unit 3 Inspection At:
Waterford, Connecticut hpril12-16,1982 Inspection Cond t
f-b b Inspectors:
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(n A. E.'FinEl, Reactor Eri neering Inspector date signed n
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date signed Approved By:
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(-M b D. A. Beckman, Chief, Plant Systems Section dite signed Inspection Summary:
Unit 3 Inspection on April 12-16,1982 (Report No. 50-423/82-05)
Areas Inspected:
Unannounced inspection of electrical component and systems procedures and installation including:
implementation of quality assurance plans, construction installations, instructions and procedures associated with equipment storage, raceway installation, and conformance with SAR commitments.
The inspection involved 37 hours4.282407e-4 days <br />0.0103 hours <br />6.117725e-5 weeks <br />1.40785e-5 months <br /> onsite by one NRC region based inspector.
Results:
Of the areas inspected, no items of noncompliance were identified.
820527020P
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DETAILS 1.
Persons Contacted Northeast Utilities Service Company R. Bush, Project Manager, Millstone Unit 3
- T. Sullivan, Senior Electrical Engineer
- S. Toth, Superintendent, New Site Construction Stone and Webster Engineering Company
- J. Carty, Superintendent of Engineering
- E. Fleming, Engineering Construction / Audit
- D. Hemminger, QA Assistant
- D. Logan, Engineer J. Kappas, Superintendent - Construction
- R. Smith, Section Head / Audit Section F. Sullivan, Assistant Superintendent - Construction
- G. Turner, Superintendent of Field Quality Control (FQC)
- W. Vos, Engineer U. S. Nuclear Regulatory Commission
- J. Mattia, Senior Resident Inspector
- denotes those present at exit meeting.
Other licensee and contractor personnel were also interviewed.
2.
Facility Tour Work in progress, completed work, and plant status were observed during a general inspection of the electrical construction activities.
Installations and activities were examined for obvious defects or noncompliance with NRC requirements or licensee commitments. Craft and supervisory personnel encountered in work areas were interviewed.
3.
Cable Spreading Room During the inspection of the cable spreading room, the inspect 3r identified that 480 volt and 4160 volt cable conduits were routed through the cable spreading room. The Preliminary Safety Analysis Report (PSAR) states that no power cables will run through the cable spreading areas. The NRC has stated in Position 18 to the PSAR that cables installed in the cable spreading area should be limited to control and instrument functions and those power cables serving the control room. The licensee's drawings indicate that a wall will be built around the installation providing a 3
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hour fire barrier for the 480 and 4160 volt cables / conduit. The current drawings show only a dotted line around the power conduits. The type of wall, the method of anchoring, and other design features have not yet been defined.
This tem is unresolved pending a review of the design and installation requi ements (50-423/82-05-01).
4.
Raceway Separation Criteria The inspector reviewed electrical specifications, Engineering and Design Coord nation Reports (E&DCRs) and drawings that established raceway separ tion criteria. These documents are consistent with Amendment 25 of the P AR. The PSAR does not include a licensee commitment to Institute of Electrical and Electric Engineers (IEEE) Standard 384-1977, Standard Criteria for Separation of Class IE Equipment and Circuits nor Regulatory Guide 1.75-1974, Physical Independence of Electrical Systems. As a result, the licensee's separation practices use measurement techniques difference from those in the IEEE Standard and Regulatory Guide and minor deviations (1/4 - 1/2 inch; 2 - 4%) were found between actual, inspector measured raceway separations and those specified by the standard and guide. Using the measurement techniques and acceptance criteria in the licensee documents, the installations are acceptable and no fire barriers are required.
The licensee's practices and criteria appear acceptable based on the neglible deviations observed in actual raceway separation. The raceway installations will be inspected again during future inspections.
No items of norcompliance were identified.
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5.
Engineering and Design Coordination Report (E&DCR)
E&DCRs F-E-4077, P-E-3566, and P-E-3605 define the criteria for physical separation of raceways, conduit, and cables for the safety related electrical systems. They also define raceway identification and color coding requirements.
The licensee is presently reviewing these E&DCR's and is planning to compile the information into a single document.
These E&DCR's also do not reflect current PSAR requirements in that they identify only two color coded, safety related trains, "A" (orange) and
"B" (purple).
The PSAR (Amendment 10, dated November 9, 1973) states that the third component cooling and charging pumps will be connected to either of two redundant 4160v emergency switchgear buses by safety related train "C."
Similarly, the PSAR states that provisions will be made to connect the third containment air recirculation fan to either of the two associated redundant 480 volt emergency switchgear buses by the "C"
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train. The current drawings show that the third containment air recirculation fan is connected to a non-safety related bu,
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i The above matters are considered unresolved pending NRC revien of the licensee's actions (50-423/82-05-02).
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Identification - Raceway Loading - Separation The licensee has established administrative controls for methods of raceway identification, raceway loading, and separation.
The installations are verified to meet the requirements as defined in the E&DCRs, drawings and specifications by Quality Control inspection.
Except as discussed in paragraphs 3 and 5 of this report the licensee has established acceptable requirements. No items of noncompliance were identified.
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Documentation Review and Equipment Storage The inspector reviewed the licensee's controls for the storage, maintenance, and preservation of equipment as described in the PSAR and applicable engineering documents.
The following documents and activities were reviewed:
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Maintenance Procedures for Stored Electrical Equipment,
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Storage of Electrical Equipment,
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Diesel Storage and Maintenance, and, Cable Storage Yard.
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The inspector observed electrical equipment in storage both in plant and in the various warehouses on the site. The equipment was covered and i
heat was applied where required. The diesel generators wera well protected and maintenance was being performed as required by the program.
Construction work was underway in the 4160 volt switchgear area, and, although the l
equipment was covered, dirt was penetrating the equipment. This matter I
had been identified and documented by the NRC resident inspector and in
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licensee audits.
The inspector observed equipment cleaning in progress
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during his tour. This matter is being followed by the resident inspector l
in conjunction with his prior findings.
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No items of noncompliance were identified.
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Unresolved Items Unresolved items are matters about which more information is required in
order to ascertain if they are acceptable. Unresolved items are discussed
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in Details, paragraphs 3 and 5.
9.
Exit Meeting i
The inspector met with licensee and Architect-Engineer / Constructor represent-atives (See Details Paragraph 1) at the end of the inspection on April
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16, 1982. The inspector summarized the purpose and scope of the inspection and identified the inspection findings. A separate meeting was held with licensee personnel, the NRC resident inspector, and the region based inspector to discuss electrical separation requirements with respect to Regulatory Guide 1.75-1974, IEEE 384-1974, PSAR Amendment 25, and the licensee's implementing documents as reported in Details, Paragraph 4.
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