ML20207D048
| ML20207D048 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/17/1986 |
| From: | Carty J, Giannattasio M, Stamm S STONE & WEBSTER ENGINEERING CORP. |
| To: | |
| Shared Package | |
| ML20207C927 | List: |
| References | |
| 7175-1634503-B2, 7175-1634503-B2-R, 7175-1634503-B2-R00, NUDOCS 8612300308 | |
| Download: ML20207D048 (19) | |
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l TEXAS UTILITIES GENERATING CO.
!l COMANCHE PEAK STEAM ELECTRIC STATION I
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ELECTRICAL g
GENERIC ISSUE g
REPORT y
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STONE & WEBSTER l
S8A"R888R8I58ljgs
R;vioita O December 17, 1986 i
TEXAS UTILITIES GENERATING COMPANY (TUGCO)
COMANCHE PEAK STEAM ELECTRIC STATION UNITS 1 AND 2 STONE & WEBSTER ENGINEERING CORPORATION'S ELECTRICAL GENERIC ISSUE REPORT hkh!)knbucI ~
nl. /)
- M.Gianna{fsio Chief Engineer i
Electrical Division C
s J. S. Carty Project Engineer
/%9Ah S. Stamm Project Engineering Manager
[4 N
R. W. Ackley, Jr.
Project Manager 7175-1634503-B2 Iy i
Revision 0 December 17, 1986 Table of Contents Title Page Table of Contents i
Index of Electrical Generic Issue Report 11
1.0 INTRODUCTION
1 2.0 SCOPE 1
3.0 CORRECTIVE ACTION METHODOLOGY 1
4.0 ORGANIZATION OF THE GENERIC ISSUE REPORT 3
Table 1 Electrical Corrective Action Plans lg 3
APPENDIX A - CALCULATIONS E'
APPENDIX B - ELECTRICAL INDEPENDENCE (R.G. 1.75)
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7175-1634503-D2 1
Revision 0 Texas Utilities Generating Company December 17, 1986 INDEX OF ELECTRICAL GENERIC ISSUE REPORT COMANCHE PEAK STEAM ELECTRIC STATION I
Interim I
Revision Date of Issue Document Title No.
Issue Date I
Plan Generic Issue Report 0
11/18/86 Electrical Appendix A Calculations 0
11/18/86 Appendix B Electrical Independence 0
11/18/86
( R.,G. 1.75)
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I R;vigion 0 December 17, 1986 GENERIC ISSUE REPORT ELECTRICAL
1.0 INTRODUCTION
Stone & Webster Engineering Corporation (SWEC) has been retained by i
Texas Utilities Generating Company (TUGCO) to develop and in'plement a Corrective Action Plan (CAP) for the Comanche Peak Steam Electric Station (CPSES) electrical system in response to the Comanche Peak Response Team (CPRT) findings and other identified findings and problem i
areas.
The CPRT findings, known as Discrepancy / Issue Reports (DIRs),
have been identified by TERA Corporation, the third-party reviewer, and by external sources.
This Generic Issue Report (GIR) defines the I
methodology and procedures for responding to design issues with the objective of demonstrating electrical system adequacy in accordance with the Final Safety Analysis Report (FSAR) and other licensing commitments.
In formulating this program, SWEC has reviewed the TERA DIRs pertinent to electrical design, ISAPs, and design issues raised by Evaluation I
Research Corporation (ERC) in their review of construction quality review.
In conducting this review of issues, SWEC assumed that each issue, as written, was factual, complete and correct.
No effort was I
made to ascertain the accuracy of each issue in order to quickly determine the magnitude of probable corrective action requirements.
Subsequent reviews may determine that the number af issues may be reduced.
This review has provided an indication of the types of s
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, electrical design issues which this electrical GIR addresses.
2.0 SCOPE The CAP to be implemented by SWEC consists of two individual corrective action plans identified in Table 1.
These plans address all DIRs identified in IRR DAP-E-EIC-501 and 504 (except as noted in specific I
CAP).
In addition, other related DIRs, TRT Issues Specific Action Plans (ISAPs) and QOC design issues will be incorporated into the individual plans where applicable 3.0 CORRECTIVE ACTION METHODOLOGY I
The corrective action presented in this section will be performed in accordance with (1) the SWEC management plan for plant quality and (2) project procedures including the following:
Project Procedure Number Title W
PP-004 Preparation, Review, and Approval of I
Design Basis Documents (DBDs)
PP-005 Processing TNE Design Deviation Re-ports (TDDRs) 7175A-1634503-B2 1
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R; vision 0 December 17, 1986 Project Procedure B
Number Title PP-009 Preparation and Control of Manual I
and Computerized Calculations PP-018 Design Verification PP-029 Review and Update of CPSES Design Calculations PP-031 Configuration Control - Prepara-tion and Issue of Design Change Packages (DCPs) Associated with CAPS PP-046 Corrective Action Plan Interface The corrective action methodology will be as follows:
3.1 Electrical licensing connitments and design criteria will be reviewed including the TERA Design Criteria List.
3.2 Based on the criteria review and review of other pertinent electrical documents such as standards, calculations and specifications, Design Basis Documents (DBD's) will be developed.
3.3 Electrical design documents and DIR's will be reviewed to ensure
. consistency with the plant design basis.
Any inconsistencies identi-I fled will be corrected.
Design documents as a minimum will include:
One Line Diagrams I
Calculations Elementary Diagrams s
Wiring Diagrams s
Interconnection Drawings I
Vendor Drawings Cable and Raceway Schedules Raceway Drawings Specifications Test Reports I
3.4 The decign documents will be reviewed against the built conditions. Any adj ustinent required to the design basis or documentation will be made.
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.g 3.5 A t, the completion of corrective action for each topic, a resolution g
report will be issued describing the corrective action taken.
3.6 SWEC will interface with other organizations to exchange information on I
DIRs, results of S W.C reviews (3.1 above), and planned corrective actions in accordance with project procedures.
The or,tanizations with which SWEC wil, interface include TUGCO, Gibbs & lia 11, ERC, EMP, Impell, Ebasco and TERA. Others will be included as required.
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l' Revision 0 December 17, 1986 3.7 Each of the corrective action plans indentified in Table 1 addresses a specific area of concern raised 'by TERA in its Issue Resolution Reports I
(IRR).
4.0 ORGANIZATION OF THE GENERIC ISSUE REPORT The main body of this report contains an overview of the scope and corrective action methodology.
Table 1 lists the electrical corrective action plans and the appendices present the individual corrective action plans.
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Revision 0 December 17, 1986 L
TABLE 1 ELECTRICAL CORRECTIVE ACTION PLANS APPENDIX A - Calculations
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APPENDIX B - Electrical Independence (R G. 1.75)
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R;vicien 0 December 17, 1986 i
APPENDIX A - CALCULATIONS
1.0 BACKGROUND
1.1 TERA reviewed selected Class 1E calculations which form the design I
basis for the electrical systems with the intent of identifying any calculation deficiencies.
Numerous Discrepancy Issue Reports (DIRs) were generated against the calculations. The calculation discrepancies were categorized in the DAP review as follows:
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1.
The assumptions made in the calculations are. incorrect, lack a supporting basis and are implemented inappropriately and inconsistently.
2.
The inputs to the calculations are not verified with the plant as-built condition.
3.
The documentation of the calculations lacks acceptance criteria and the references lack revision status or date.
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Computer programs lack verification and validation.
Computer printouts used in the calculations lack identification, are l
incomplete and untraceable.
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The calculations contain numerous minor mathematic errors.
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The results of the calculations are incorrect, do not confirm the l
design basis for the equipment and are inconsistent with speci-fications and with the ratings of installed equipment.
e 1.2 The DIRs are listed and grouped according to the above discrepancy categories in Attachment 1.
2.0 SWEC's Understanding of the Issues The calculations which form the design basis for the electrical systems
. contain inadequacies, are inconsistent when compared to other documents l
and do not consistently meet licensing commitments.
Design inputs, sources of
- input, assumptions, and computer analysis for these calculations are either inadequately documented or unavailable.
Calculations which form the design basis for the electrical system must I
be reviewed and updated to ensure they reflect confirmed design inputs and assumptions, are technically correct, and are consistent with licensing commitments.
The effects of revised calculations on other I
design documents will be reviewed.
3.0 SWEC Action Plan to Resolve the Issues 1
1 3.1 Review calculations which form the design basis of the safety related i
electrical systems and interfaces for consistency with design basis documents (DBD's) and design documents with respect to technical adequacy.
This review shall be documented using the following steps.
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r R vicica 0 December 17, 1986 3.1.1 Proj ect procedures will be established for review and validation of existing manual and computerized engineering I
and design calculations.
If required, new calculations will be prepared.
I 3.1.2 Permanent plant drawings and related unincorporated Design Change Authorizations (DCAs), design basis documents and specifications will be used to ensure complete reviews.
The review for technical adequacy will address calculation
- inputs, assumptions, methodology,
- accuracy, outputs and conclusions.
Input will be reviewed for applicability, I
accuracy, and source reference. Methodology will be reviewed for compliance with licensing commitments and to ensure that it is appropriate for the calculation's objectives. Outputs I
will be reviewed to confirm that they are reasonable in consideration of the methodology and objective of the calculation.
The review will verify that calculation assumptions, inputs, and references are
- correct, the sources are uniquely ideatified, and any inputs that require future confirmation I
have been identified.
(Note:
Any input not deemed final will be marked " Confirmation Required.")
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calculation index will be developed to provide documentation of status (e.g.,
Confirmation
- Required, Superseded, Supplemented by, etc.).
3.1.4 Where necessary field walkdowns will be performed to verify built conditions and nameplate data.
I 3.2 Based on the review of the DIRs and calculations covered by Section 3.1, the documents will be sorted into the following categories in order to determine the magnitude of corrective action required, and to ensure that all necessary calculations have been prepared and completed I
to support the design:
Valid calculations (no additional work required) 1 Calculations requiring revisions Calculations requiring confirmation I
New calculation required (no calculation presently exists or existing calculation to be voided and superseded by new I
calculation)
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3.3 Modifications of existing hardware or addition of new hardware will be identified, if required.
3.4 Close-out of calculation input, identified under Section 3.1 as I
requiring confirmation, shall be by revision to the calculation to identify final source, addition of supporting documentation such as j
7175B-1634503-B2 A-2 O
Revision 0 December 17, 1986 calculation attachments, and revision of analysis / design where necessary, or by other means as provided in project procedures.
4.0 REFERENCES
4.1 Comanche Peak Design Adequacy Program, Discrepancy / Issue Reports, dated (Later) 4.2 Issue Resolution Report DAP-E-EIC-501 Electrical Calculations 5.0 CLOSURE 5.1 The completed calculations from the electrical calculation action plan will be the basis for the permanent documents of record for the plant and will provide assurance of the technical adequacy of the design of I
the electrical distribution system in accordance with CPSES licensing commitments.
I 5.2 A resolution report will be prepared - addressing the external source, and self initiated concerns resolved as a result of the corrective action plan.
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Rtvision 0 December 17, 1986 ATTACHMENT 1 5
1.0 The following DIR's are included in Issue Resolution Report (IRR)
DAP-E-EIC-501.
1.1 DIR's for Assumptions I
DIR Issue Issue No.
D-0064 1950 A-H Batt. Duty-Cycle Load Inconsistency I
D-0069 1950 A-H Batt. Duty-Cycle Load Non-Verifi-cation D-0071 1950 A-H Batt. Duty-Cycle Random Load Non-Verifi-I cation D-0072 1950 A-H Batt. Steady-State Load Non-Verification D-0082 Inverter DC Input Current Inconsistency D-0810 480V Switchgear Bus Min.
Voltage Inconsistency I
D-0814 Max. Fault Current Inconsistency at Class IE Distri. Panels D-0827 480V System Load Study Inconsistency with D/G Load Study D-0828 Inappropriate Assumption for Motor Voltage Dip D-0833 D/G Loa'd Sizing Assumption Non-Verification I
D-0834 D/G Assumed Power Factor Inconsistency D-0843 Exclusion of DBA During Grid Voltage Variation D-1149 Insufficient Design Margin Between Calculated Short-Circuit Current and Equipment Rating I
D-2050 Fire Stop Penetration Derating Factor Not Verified 1.2 DIRs for Inputs DIR Issue Issue No.
D-0059 1950 A-H Battery Loads Inconsistency D-0060 1950 A-H Battery Duty-Cycle Load Inconsistency D-0067 D/G Neutral Grounding System Shorting Contact Designation Inconsistency D-0070 1950 A-H Battery Duty-Cycle Load Deletion I
D-0074 1200 A-H Battery Load Inconsistency D-0075 1200 A-H Battery Dist. Panels Load Inconsistency D-0081 1950 A-H Battery Duty-Cycle Load Non-Verification D-0293 Minimum Terminal Voltage at Spent Fuel Pool Cooling
- I Pump Motor Below Criteria Limit D-0294 Min / Max Grid Voltages Inconsistency for Short-Cir-cuit Calculations I
D-0806 Battery Charges Input Rating Inconsistency D-0807 Class IE DC Panelboard Loads Inconsistency D-0811 125VDC Inrush Current Info. Incomplete D-0812 120VAC Cable Sizing Input Data Inconsistency I
D-0816 One.Line Diag. & Calc. Load Inconsistency
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D-0817 120VAC Cable Inappropriate Impedance D-0826 125V DC Swbd. & Dist. Pal. Circuit Breaker Rating I
Inconsistency DIR Issue Issue No.
D-0822 Short-Circuit Calc. Input Inconsistency D-0825 138kV/345kV Grid Volt.
Range Inconsistencies D-0838 Inappropriate Battery Charge Load for D/G Load I
Sizing D-0840 Missing SUPS Loads D-0841 Inverter Load Inconsistency Between Calc. & As-I Built Condition D-0861 Cable Length Inconsistency Between Calc. and Race-way Schedule I
D-1151 AC Districution System Voltage Variation Deletion in Calc.
D-2036 Incorrect Inputs in Calc. VII-13 for Cable Sizing D-2048 Lack of Use of Fire Barrier Derating Factor I
D-2049 Selection Basis of the Limiting Raceway for Derat-ing of Cables 1.3 DIRs for Documentation DIR Issue Issue No.
D-0061 1950 A-H Batt. Inverter Eff. Not Specified D-0062 1950 A-H Batt. Duty-Cyle Load Unavailability I
D-0063 1950 A-H Batt.
Duty-Cycle Load Unavailability D-0065 1950 A-H Batt. Duty-Cyle Load Non-Verification D-0068 Missing 1950 A-H Battery Duty Cycle Load I'
D-0826 Lack of Load Control in AC Overvoltage Control Calculations III-6, III-7, III-8 D-0830 Lack of Acceptance Criteria & Design Review D-0836 Lack of References for D/G Load Calc.
I D-0837 Lack of Acceptance Criteria for D/G Load Calc.
D-0842 Improper Revision Status for D/G Load Sizing Cal-culation l
D-0895 Lack of NSSS Inverter Load Calculation Documenta-
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D-0896 Lack of B0P Inverter Load Method of Analysis and l g Acceptance Criteria
- 3 D-2039 Missing Reference in Calc. VII-1 for Cable Sizing D-2040 Inadequate Design Control Procedure for G&H Calc.
VII-8 D-2044 Lack of App. D in Calc. VII-6 Rev. 12 D-2045 No Basis for Diversity Factor for MCC Intermittent Loads I
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' I R:vicion 0 December 17, 1986 1.4 DIRs for Computer Programs DIR Issue Issue No.
D-0819 6.9kV/4800V System Short-Circuit Computer Program 6062 Non-Verification D-0829 Lack of Computer Program Rev/Date Referenced in I
Calc.
DIR Issue Issue No.
D-0831
. Calculation Results Incomplete & Untraceable D-0832 Demarcation of Revision on Computer Printout 1.5 DIRs for Methodology DIR Issue Issue No.
D-0057 1950 A-H Battery Design Capacity Non-Inclusion in Battery Sizing I
D-0073 1950 A-H Battery Charging Time Inconsistency D-0083 1200 A-H Battery Charger Time Inconsistency D-0818 6.9kV Motors Multiplying Factor Not in Agreement I
with ANSI /IEEE Standard D-0821 D/G Transient Reactance Not in Agreement with ANSI /IEEE Standard D-0835 Mathematics Errors in D/G Load Calc.
I D-2037 Calq. Method Inadequacies:
Calc.
VII-13 Cable Sizing Calc.
D-2041 Inadequate Instrument Cable Sizing Basis 1.6 DIRs for Results I
DIR Issue Issue No.
D-0058 1950 A-H Battery Loads Inconsistency I
D-0066 D/G Grounding Resistor Rating Inconsistency D-0076 1200 A-H Battery Load Inconsistency D-0080 1200 A-H Batter Load Inconsistency I
D-0291 480V Equip. Term. Voltage Below Criteria Limit D-0292 480V Equip. Term. Voltage Below Criteria Limit D-0295 480V Swgr.
Bkr.
Interrupting Rating Inadequacy D-0808 480V Equip. Term. Voltage Below Criteria Limit I
D-0809 Min Pickup / Holding Voltages for Class IE Starter Coils Discrepancy D-0813 Batt.
Charger Max Output Current Inconsistency I
D-0815 125VDC Cable Length Insufficiency for Short-Circuit Protection D-0823 Aux. System Voltage Dip > Criteria Limit I
D-0824 D/G Voltage /Freg. Stability L'imits not Specified in Specification
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D-0839 D/G Sizing Inadequacy D-0862 D/G Load Sizing Not Verified Through Predicted I
Loads During Preop Test D-0863 D/G Preop Test Lacking Load Rej ection Criteria
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D-0864 D/G Neutral Grounding Resistor Size Indetermi-I nate D-2038 Minimum Acceptable Voltages Exceeded for Loads of Panel IEC1 I
D-2042 No Calculations for Control Cable Sizing DIR Issue Issue No.
D-2043 Missing Calc. for 480V MCC 2EB4-1 Branch Feeder D-2046 125VDC Class 1E Cable Sizing Inadequate D-2047 Inadequate 480V SWGR Breaker DC Control Circuit Sizing 2.0 The following DIR's which were not listed in Issue Resolution Report (IRR) DAP-E-EIC-501 will be included as part of this Correct Action I
Plan.
2.1 DIR's for Assumptions DIR Issue Issue No.
D-1878 Failure to list assumptions in cable pulling ten-sion calculation D-1931 Inverter DC Short-Circuit Calc. Voltage Level Error E-1149 System Shcrt-Circuit Currents i
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E-1190 Overcurrent Protection E-1152 Cable Sizing 2.2 DIR's for Inputs D-0844 CPSES Motor List EML-I not available for review of i
calculation inputs.
9.3 DIR's for Documentation D-1037 Battery Calculation / Specification Load Mismatch.
D-1876 Incomplete References in Cable Pulling Tension Calculation D-1877 Ambiquous References in Cable Pulling Tension l
Calculation E-1191 AC Distribution System Voltage 3
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R:vicien 0 December 17, 1986 APPENDIX B - ELECTRICAL INDEPENDENCE (R.G. 1.75)
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1.0 BACKGROUND
I TERA reviewed the physical and electrical independence of the redundant systems for compliance with R.G.
1.75 (and IEEE 384) and issued IRR DAP-E-EIC-504.
The DIRs contained in the IRR can be categorized as follows:
1.
Iridequate Separation Wi tin Panels 2.
Safety-Circuit Degradation Due to Nonsafety Interface I
3.
Inadequate Separation for Conduit / Cable / Tray Configurations 4.
Inadequate Sensor / Tap Separation Requirements 5.
Electrical Equipment Separation Concerns The CPRT has issued ISAPs addressing similar concerns.
Attachment B-1 lists and summarizes the DIRs and ISAPs by category and I
identifies those DIRs addressed in other discipline GIRs.
R.G. 1.75 and IEEE 384 provide a design basis to ensure the physical I
and electrical independence of electrical equipment and systems.
Deviations from the spatial requirements of R.G. 1.75 may be satisfied by analysis based on test.
Such analysis must be submitted as part of FSAR.
2.0 SWEC'S UNDERSTANDING OF THE ISSUE A review of the independence (including separation) related DIRs and ISAPs indicate that the probable causes of inconsistencies are:
l Lack of adequate criteria (i.e., criteria is not sufficiently i
detailed)
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Lack of training based on existing criteria Lack of adequate criteria and inadequate training in application of the criteria resulted in design documents which do not demonstrate electrical independence in compliance with R.G. 1.75.
3.0 SWEC ACTION PLAN TO RESOLVE TIE ISSUES 3.1 Review of Existing Separation l
3.1.1 A review of existing criteria (inetallation specification, I
installation drawings, etc) will be conducted to determine whether or not criteria (1) refl.ct current licensing commitments and (2) provide adequate and sufficient detail.
3.1.2 Built electrical configurations will be compared with separation criteria to establish the extent of any discrepancies.
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3.1.3 Where (1) lesser distances than stated in R.G.
1.75 are specified, (2) barriers and enclosures are utilized or (3)
I other deviations occur, the technical adequacy of supporting analysis will be reviewed.
3.2 Design Basis Document A separation criteria DBD will be developed to ensure that licensing commitments are properly identified.
3.3 Identification of Independence Issues Based on the DBD, design features not in accordance with R.G. 1.75 spatial requirements, or without supporting analysis or adequate technical justification, will be identified as independence issues.
3.4 Resolution of Independence Issues Each identified independence issue will be resolved either by providing I
adequate technical justification based upon analysis and/or test as warranted or by providing barriers or proper spatial separation.
I Separation criteria and associated documents will be revised based upon resolved independence issues.
4.0 CLOSURE A resolution report will be prepared addressing external source and self initiated concerns resolved as a result of the corrective action I
plan.
In addition, this report will include recommendations relative to maintaining physical independence of the redundant electrical systems throughout the life of the plant.
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Rsvicion 0 December 17, 1986 ATTACHMENT B-1 I
1.
Inadequate Separation Within Panels I
D-0381 Train A/Non-1E Cable Separation in BOP Analog Rack CI-01 D-1121 Separation Violations Within 6.9 kV Switchgear D-1822 Apparent Inadequate Panel Device Separation CB-09 D-2017 CR Ventilation Panel Separation Less Than Requirement I
D-2170 Violation of, Separation Criteria Within Control Panels Similar Concerns I
D-0738 Failure to Identify Non-Class 1E Wiring D-1290 Separation Violation Within 6.9 kV Switchgear E-0386 Failure to Maintain Minimum Separation I
E-0387 Failure to Maintain Minimum Separation E-0389 Iailure to Maintain Minimum Separation E-0390 Failure to Maintain Minimum Separation ISAP I.b.1 Flexible Conduit to Flexible Conduit - Inside Panels I.b.2 Flexible Conduit to Cable - Inside Panels I.b.4 Barrier Removal and Wire to Wire - Inside Panels 2.
Safety-Circuit Degradation Due to Nonsafety Interfaces I
D-0041 Isolation Device Qualification, AFW Control Relay D-0042 Isolation Device Qualification, AFW Hand Switch Control D-0051 Isolation Device Qualification, AFW Control D-0613 AFW Cable Separation Violation
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I D-1527 Lack of Supporting Calculations D-1797 Non-Class IE Circuits Without Isolation D-1849 Nonseismic Instr. Connected to Safety-Related System D-2169 MCC Strip Heaters Do Not Have an Acceptable Isolation Device t
l Similar Concern D-2016 Dual Train Control Switches - Separation Problem 3.
Inadequate Separation for Conduit / Cables / Tray Configurations D-0302 Minimum Separation D-1177 Separation of Flexible Conduit Lacks Analysis I
D-1800 Inadequate Separation Between Class 1E and Non-Class 1E Circ D-1801 E9 - Non-Class 1E Minimum Separation Similar Concerns D-0441 Lack of Basis for Separation Criteria D-0442 Inconsistent Analysis Assumptions I
D-1178 General Plant Separation Less Than Required l
E-0388 Separation Criteria Analysis Not Reviewed by NRC ISAP I.b 3 Conduit to Cable Tray s
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Inadequate Sensor / Tap Separation Requirements (Note 1)
D-1855 Separation Problem With AFW Suction Press Switch Install D-1857 Lack of Instrument Separation Criteria ES-100 5.
Electrical Equipment Separation Concerns D-1799 E-9 Panel Separation D-1802 Separation of Flexible Conduit From Piping-Doc. Discrepancy (Note 2)
D-2019 X-HV-5883 Redundant Solenoids Separation L
Similar Concerns D-0300 Splices in Cable Tray D-1179 Cable Train Identification Confusion D-1798 High Energy Equipment in Control Room and Spreading Room Note 1 This category is addressed in the Instrument. and Control GIR.
Note 2 This DIR is addressed in the MecS nical GIR.
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