IR 05000346/1977002
| ML19326A380 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 02/04/1977 |
| From: | Jordan E, Naidu K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML19326A358 | List: |
| References | |
| 50-346-77-02, 50-346-77-2, NUDOCS 8002030184 | |
| Download: ML19326A380 (6) | |
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UNITED STATES UUCLEAR REGULATORY COMMISSION
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OFFICE OF INSPECTION AND ENFORCEMENT
REGION III
Report of Construction Inspection IE Inspection Report No. 050-346/77-02 Licensee: Toledo Edison Company
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Edison Plaza 300 Madison Avenue Toledo, Ohio 4365';
Davis-Besse Nuclear Power Station License No. CPPR-80 e
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Oak Harbor, Ohio Category:
B Type of Licensee:
PWR 2772 MWt 926 MWe Type of Inspection:
Announced, Special
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Dates of Inspecti'on:
anuary 19-20, 1977
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h Principal Inspector:
K. k.
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N (Date)
Accompanying Inspectors:
None
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Other Accompanying Per nnel:
None
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rdan, Chief k/M Reviewed By:
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Engin ring Support Branch
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SUMMARY OF FINDINGS P
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Inspection Summary Inspection of January 19 and 20,1976, (Unit 1, 77-02): Observed the performance of Hi-Pot testing on cables in conduits 27708A and 36919B. No items of noncompliance were identified. Test results, indicate. that cables in the conduits were not damaged.
Items of Noncompliance Non3.
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Licensee Action on Previously Identified Enforcement Items Not reviewed.
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Other Significant Items A. - Systems and Components None.
B.
Facility Items (Plans and Procedures)
None.
C.
Managerial Items None.
D.
Deviations None.
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E.
Status of Previously Reported Unresolved Items
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None.
Management Interview A.
The following persons attended the Management Interview at the conclusion of the inspection.
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Toledo Edison Company (TECo)
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L. E. Roe, Vice President, Facilities Development E. C. Novak, General Superintendent Power Engineering
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and Construction.
J. D. Lenardson, Quality Assurance Manager
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B.
Matters discussed and comments on the part of the management personnel were as follows:
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The inspector stated that he observed the Hi-Pot tests on cables in selected conduits and determined that the tests were being conducted satisfactorily.
The inspector stat'ed that the complete documentation on the test results will be reviewed during a sub-sequent inspection.
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REPORT DETAILS mU Persons Contacted
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The following persons other than those listed under Management Inter-view section of the report, were contacted during this inspection:
Bechtel Corporation (Bechtel)
W. C. Lowery, Electric Quality Assurance Engineer Fischbach and Moore, Incorporated (F6M)
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W. L. Columbia, Assistant Project Engineer G. L. Roshy, Quality Control Manager Toledo Edison Company (TECo)
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M. D. Calcamuggio,. Electric Engineer C. Daft, Field Quality Assurance Engineer G. W. Eichenauer, Field Quality Assurance Engineer W. Mitchell, Electrical Engineer
E. Wilcox, Field Quality Assurance Specialist Results of Inspection
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1.
Observation of Higli Voltage Tests on Cables To observe the testing in progress and determine whether the per-formance of the high voltage tests on cables in two predetermined ~
conduits were conducted to established procedure CTP-7749-E14 -
11.9 1.e., dated March 15, 1974, and determine whether the results were acceptable. These tests were conducted to meet the licensee's
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commitments to assure the NRC that jacket insulation of cables was
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not damaged during installation of. cables into highly filled conduits.
(Reference Item 10, Page 7 of IE Inspection Reports No.
050-346/76-11 and No. 050-346/76'-25)
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2.
Inspection Objectives Accomplished By a.
Review of Construction Test Procedure for DC Hi-Pot Testing Electrical Cable rated greater than 600 volts CTP-7749-E14-11.9 1.e.,
Revision 1, dated March 15, 1974.
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Review of Letter TECO File 0273-E-14 dated December 10, 1976, instructing Bechtel to use the above specification but to use 10KV DC instead of the test voltage specified in Paragraph 6.6.
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c.
Review Bechtel letter FL14-4503, dated January 3, i
1977, instructing F&M to perform the Hi-Pot test on the cables in conduits 27708A and 36919B.
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d.
Observing the testing of three cables in conduit 27708A and four cables in conduit 369L9B.
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Inspection Findings a.
General
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Conduit 27708A contained seven cables identified by numbers ICBE1126C, ICBE1147G, ICBE1161F, ICBE1194G, ICBE1195C, ICBE1199G and ICBE1218H, Conduit 36919B contained nine cables identified by numbers 2 CAD 1083,
'2 CAD 1130, 2CGD201N, 2CGD2023, 2CGD202E, 2CGD202F, 2CGD203G, 2CGD208B and 2CGD210A.
Two spare cables, c
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2C SPARE 19 and 2C SPARE 20.which had at one time been pulled through the conduit had been pulled back and were lying in the cable tray spares, were included in the testing.
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b.
Methods of Testing 101G7 DC was being applied between an ind'ividual-s conductor and the remaining conductors in a given cable.
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The test was repeated so that every conductor was tested against the conductors.
The charging currents, after stablization was reached, were being recorded.
The vol-tage was raised in steps of 2KV in two minute intervals, to reach a maximum of 10KV and held for five minutes.
In doing so the procedural requirements were being met.
As a result of discussions with the licensee, on January 20, 1977, the test was modified and 10 KV DC was applied between an individual conductor in a cable and other conductors in the same cable along with all the other conductors in cables in the same conduit.
Two cables in conduit 27708A and three cables in conduit 36919B were tested in this manner.
On January 21, 1977, the test was modified and 10KV DC was applied between an individual conductor and all the other conductors in the same cable, with all the conductors in the
' cables routed through the conduit, at ground potential.
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Observation ~f Tests
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The inspector observed the tests being performed and
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determined that:
(1) Cables tested were procured to specification E-7749-15.
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(2) The two DC Hi-Pot testers had current calibration
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stickers and the calibration records were acceptable.
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(3)
Relative humidity and temperature were being recorded on the data sheets.
The values were supplied by the painting contractor', Bagwell Industries.
(4) The cables under test were meggered prior to the Hi-Pot test.
e (5) Test. voltage was being applied in increment steps of
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2KV every two minutes And the charging currents were being recorded in microamperes.
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(6) Test results indi.cated that leakage currents were accept-able as established in the procedure mentioned below.
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(7) Acceptance criteria was that the leakage currents
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should first increase and subsequently descrease h
and stabilize, she.uld not continue to increase at
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full test voltage and leakage currents on individual conductors of the same cable should not deviate morb than 300% from each other.
The performance of the tests and the values measured
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were determined acceptable.
The documentation on the i
tests will be reviewed during a subsequent inspection.
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