ML18191B339
| ML18191B339 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 07/09/2018 |
| From: | Southern Nuclear Operating Co |
| To: | Office of New Reactors |
| Shared Package | |
| ML18191B337 | List: |
| References | |
| ITAAC 3.3.00.07d.ll.a, ND-18-0813 | |
| Download: ML18191B339 (5) | |
Text
U.S. Nuclear Regulatory Commission ND-18-0813 Enclosure 1 Page 1 of 5 Southern Nuclear Operating Company ND-18-0813 Vogtle Electric Generating Plant (VEGP) Unit 3 and Unit 4 Docket No.: 52-025 & 52-026 Completion Plan for Uncompleted ITAAC 3.3.00.07d.ll.a [Index Number 800]
U.S. Nuclear Regulatory Commission ND-18-0813 Enclosure 1 Page 2 of 5 ITAAC Statement Desion Commitment 7.d) Physical separation Is maintained between Class 1E divisions and between Class 1E divisions and non-Class 1E cables.
Insoections. Tests. Analvses Inspections of the as-built raceways that route Class 1E cables will be performedto confirm that the separation between raceways that route Class 1E cables of different divisions, and between raceways that route Class 1E cables and raceways that route non-Class 1E cables is consistent with the following:
ii.a) Within other plantareas (hazard areas), the minimum separation is defined byone of the following:
- 1) The minimum vertical separation is 5 feet and the minimum horizontal separation is 3 feet.
- 2) The minimum vertical separation is 12 inches and the minimum horizontal separation is 6 inches for raceways containing onlyinstrumentation and control and low-voltage power cables ^ 2/0 AWG. This minimumvertical separation is 3 inches for the configuration with a conduit above and crossing the open tray at an angle equal to or greater than 45 degrees.
- 3) The minimum vertical separation is 12 inches and the minimum horizontal separation is 6 inches between a conduit and an open configuration for low-voltage power cables greater than 2/0 AWG but not greater than 750 kcmil. The vertical separation is 3 inches if a conduit is above and crossing an open tray at an angle equal to or greater than 45 degrees.
- 4) For configurations that involve exclusively limited energycontent cables (instrumentation and control), the minimum vertical separation is 1 inch and the minimum horizontal separation is 1 inch.
- 5) Forconfigurations involving an enclosed raceway and an open racewaywith low-voltage power cables, the minimum vertical separation is 1 inch if the enclosed raceway is below the open raceway.
- 6) Forconfiguration involving enclosed raceways, the minimum separation is 1 inch inboth horizontal and vertical directions.
- 7) The minimum vertical separation is 1 inch and the minimum horizontal separation is 1 inchforconfigurations with a non-safety conduit and a free air safety cable with low-voltage power cables and below.
U.S. Nuclear Regulatory Commission ND-18-0813 Enclosure 1 Page 3 of 5 Acceotance Criteria Results of the inspection will confirm that the separation between raceways that route Class 1E cables of different divisions, and between raceways that route Class 1E cables and raceways that route non-Class 1E cables is consistent with the following:
ii.a)Within other plant areas inside containment (hazard areas), the separation meets one of the following:
- 1) The vertical separation is 5 feet or more and the horizontal separation is 3 feet or more.
- 2) The minimum verticalseparation is 12 inches and the minimum horizontalseparation is 6 inches for raceways containing only instrumentation and control and low-voltage power cables ^2/0 AWG. This minimum vertical separation may be reduced to 3 inches for the configurationwith a conduit above and crossing the open tray at an angle equal to or greater than 45 degrees.
- 3) The minimum vertical separation is 12 inches and the minimum horizontal separation is 6 inches between a conduit and an open configuration for low-voltage power cables greater than 2/0 AWG but not greater than 750 kcmil. The vertical separation may be reduced to 3 inches if a conduit is above and crossing an open tray at an angle equal to or greater than 45 degrees.
- 4) Forconfigurations that involve exclusively limited energy content cables (instrumentation and control), the minimum verticalseparation is 1 inch and the minimum horizontal separation is 1 inch.
- 5) Forconfigurations that involve an enclosed raceway and an open raceway with low-voltage powercables, the minimum vertical separation is 1 inch if the enclosed raceway is below the open raceway.
- 6) Forconfigurations that involve enclosed raceways, the minimum vertical and horizontal separation is 1 inch.
- 7) The minimum vertical separation is 1 inchand the minimum horizontal separation is 1 inchfor configurations with a non-safety conduit and a free air safety cable with low-voltage power cables and below.
ITAAC ComDietlon Description Multiple ITAAC are performed to ensure that physical separation is maintained between Class 1E divisions and between Class 1E divisions and non-Class 1E cables. This ITAAC requires inspections of the as-built raceways that route Class 1E cables and raceways that route non-Class 1E cables inside containment to confirm that physical separation between raceways that route Class 1E cables of different divisions and between raceways that route Class 1E cables and raceways that route non-Class 1E cables meet the required separation distances.
The Class 1E cables and raceways and non-ClassI E cables inside containment are designed to be appropriately separated in accordance with APP-GW-E1-001 (Reference 1). Installation specifications provided to the constructor identify the separation criteria, consistentwith the ITAAC commitment.
U.S. Nuclear Regulatory Commission ND-18-0813 Enclosure 1 Page 4 of 5 Class 1E electrical cables and raceways are installed in accordance with design drawings, installation specifications issued for construction and work package requirements. Completed raceway installation, in-progress and completed cable installation, and completed cable terminations are inspected to ensure the separation installation specifications are satisfied.
Inspections are performed in accordance with the Construction Quality Verification Program 26139-000-4MP-T81C-N7101 (Reference 2). The completed inspection records document the satisfactory separation between raceways that route Class 1E cables of different divisions, and between raceways that route Class 1E cables and raceways that route non-Class 1E cables.
Cable Separation Reports XXX (References 3 and 4) identify the inspection reports associated with the raceway separation inspections and confirm that the separation between raceways that route Class 1E cables of different divisions, and between raceways that route Class 1E cables and raceways that route non-Class 1E cables is consistent withthe following:
Within other plantareas inside containment (hazard areas), the separation meets one ofthe following:
- 1) The vertical separation is 5 feet or more and the horizontal separation is 3 feet or more.
- 2) The minimum vertical separation is 12 inches and the minimum horizontal separation is 6 inches for raceways containingonlyinstrumentation and control and low-voltage power cables <2/0 AWG.This minimum vertical separation may be reduced to 3 inches for the configuration with a conduit above and crossing the open tray at an angle equal to or greater than 45 degrees.
3)The minimum vertical separation is 12 inchesand the minimum horizontal separationis 6 inches between a conduit and an open configuration for low-voltage power cables greater than 2/0 AWG but not greater than 750 kcmil. The vertical separation may be reduced to 3 inches if a conduit is above and crossing an open tray at an angle equal to or greater than 45 degrees.
- 4) For configurations that involve exclusively limited energy content cables (instrumentation and control), the minimum vertical separation is 1 inch and the minimum horizontal separation is 1 inch.
- 5) For configurations that involve an enclosed raceway and an open raceway with low-voltage power cables, the minimum vertical separation is 1 inch if the enclosed raceway is below the open raceway.
- 6) For configurations thatinvolve enclosed raceways, the minimum vertical and horizontal separation is 1 inch.
- 7) The minimum vertical separation is 1 inch and the minimum horizontal separation is 1 inch for configurations with a non-safety conduit and a free airsafetycable with low-voltage power cables and below.
Exceptions are not included within the scope ofthis ITAAC and are addressed within the scope of ITAAC 3.3.00.07d.iii.a (Enclosure 2), ITAAC 3.3.00.07d.iv.a (Enclosure 3), or IT/\\AC 3.3.00.07d.v.a (Enclosure 4).
U.S. Nuclear Regulatory Commission ND-18-0813 Enclosure 1 Page 5 of 5 The Cable Separation Reports (References 3 and 4) are available for NRC inspection as part of the Unit 3 and Unit 4 ITAAC 3.3.00.07d.ii.a Completion Packages (References 5 and 6, respectively).
List of ITAAC Findings In accordance with plant procedures for ITAAC completion, Southern Nuciear Operating Company(SNC) performed a review ofall ITAAC findings and associated corrective actions.
This review found no relevant ITAAC findings associated with this ITAAC.
References favaiiabie for NRC inspection)
- 1. APP-GW-E1-001, Electrical Systems Design Criteria 2.
26139-000-4MP-T81C-N7101, Bechtel Construction Quality Verification Program 3.
Unit 3 Cable Separation Report XXX 4.
Unit 4 Cable Separation Report XXX 5.
3.3.00.07d.ii.a-U3-CP-Rev0, ITAAC Completion Package 6.
3.3.00.07d.ii.a-U4-CP-Rev0, ITAAC Completion Package