ML20235S642
| ML20235S642 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 06/30/1987 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| PY-CEI-OIE-0277, PY-CEI-OIE-277, NUDOCS 8707210729 | |
| Download: ML20235S642 (11) | |
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f THE CLEVELAND ELECTR P.O. BOX $000 - CLEVELAND. OHIO 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLDG - 55 PUBLIC SOUARE Serving The Best Location in the Nation MURRAY R. EDEl. MAN PRIORITY RDUTING e 30, 1987 PY-CEI/01E-0277 L
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SR WCE PRESIDENT NUCLE AR NIGe / v Mr. A. Bert Davis
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3 hU Regional Administrator, Region III E
- U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Perry Nuclear Power Plant Docket No. 50-440 Update on Augmented Inspection Team (AIT) Commitments i
Dear Mr. Davis:
to this letter provides a status on the commitments made to the Augmented Inspection Team on June 20, 1987, as documented in our letter PY-CEI/0IE-0276 L. is a summary of the drawing consistency review for the C71, C51, and B21H systems as committed to in our June 20, 1987 letter.
If you have any questions, please feel free to call.
Very truly yours, Wef Murray. Edelman Senior Vice President Nuclear Group MRE:njc Attachment cc:
K. Connaughton T. Colburn Document Control Desk Dy jDOCKo729 g70$39 05000440 G
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JUL 6 1987 I CG/
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r PY-CEI/0IE-0277 L Commitment CEI will modify the power supplies to the MSIV solenoids. This modification will preclude an MSIV isolation from the loss of a single RPS power supply.
This modification will be completed prior to startup following the July 12, 1987 outage.
CEl will continue to discuss this proposed modification with the NRC staff.
Status A Design Change Package (DCP) has been initiated to modify the power supplies to the MSIV solenoids. As discussed in the commitment this change will preclude an MSIV isolation from the loss of a. single RPS power supply. CEI presently intends to install this modification prior to startup following the July 12, 1987 outage. CEI personnel have discussed this modification with both site NRC personnel, and members of the NRR staff. The modification package has been given to the~ Perry Nuclear Power Plant NRC Resident Office.
Commitment CEI will add a note to the appropriate plant instruction to require the Operator to shut the MSIVs using the remote manual switches, if the MSlVs close as a result of an RPS power loss.
This action will be complete prior to the plant startup.
Status CEI changed the appropriate plant instructions to require the operator to shut the MSIV's using the remote manual switches, if the MSIVs close as a result of an RPS power loss. The action was completed on June 20, 1987 prior to plant startup.
Commitment CEI will provide improved permanent barrier separation in the RPS relay cabinets (H) 3-P691, H13-P692, H13-P693, and H13-P694) prior to startup following the July 12, 1987 outage.
Status Engineering is presently evaluating the internal wiring in the RPS relay cabinets to determine necessary improvements.
The improvements will be installed prior to startup following the July 12, 1987 outage.
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Attachment i PY-CEI/01E-0277 L i
Commitment CEI will complete a consistency review of General Electric drawings versus GAI drawings for C71, C51, and B21H systems. While this review will be essentially completed by June 22, 1987, all attendant changes to the drawings will be completed by June 26, 1987. A summary of the results of this review will be sent to the NRC.
Status CEI completed the consistency review for the three systems on June 22, 1987 (See Attachment 2).
This review indicated that there were no additional drawing discrepancies which affect wiring, power supply, or component / system function.
The drawing changes to the MSIV pilot solenoid power supply drawings and to the minor discrepancies found during the consistency review have been approved. This item is considered completed.
Commitment CEI will satisfactorily complete surveillance testing of the normal RPS power supply output breakers prior to starting the plant.
CEI will change out the EPA cards of the normal RPS "B" power supply prior to startup following the July 12, 1987 outage.
Status CEI completed surveillance testing on the normal RPS power supply output breakers on June 20, 1987 CEI will change out the EPA cards on the normal RPS "B" power supply prior to startup following the July 12, 1987 outage.
Commitment CEI will provide the results of the failure analysis which GE is conducting on the EPA cards which were replaced on June 18, and 19, 1987.
Status GE is still evaluating the EPA cards.
Once the evaluation is completed, CEI will submit the results to the Perry Nuclear Power Plant NRC Resident Office for NRC review.
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e PY-CEI/01E-0277.L t
. gal /GE Elementary Wiring Diagrams Review c
The.RPS' power supply assignments for the inboard and' outboard Main Steam I
Isolation Valves (MSIV) are shown on gal drawings B 208-013 Sheets HOS, H10, and'
' H11. These drawings are b'ased on GE elementary wiring diagrams 828E445CA, Sheets 4,10, and 11. Revision 1 of GE drawing 828E44SCA, Sheet 4 shows Figure' 6
- (outboard MSIV's) being supplied by Panel 1C71-P001 and Figure 7 (inboard MSIV's)
L supplied by Panel 1C71-P002. Revision 2 of drawing 828E445CA, Sheet 4 made.
various changes in'cluding a change to the Figure 6 and 7 power supply assignments.
Revision 2 reversed the power supplies between Figures 6 and 7. Figure 6 is now supplied by 1C71-P002 and Figure 7'is supplied by 1C71-P001. While other changes
'on the GE drawing were clearly identified with ba& circles, the change of panel assignment on Figures 6 and 7. were not. Consequently this change was not p
, incorporated on the equivalent gal drawing B 208 013, sheet H05. This resulted in l-the two solenoids controlling each MSIV being supplied from the same power source rather than from two different power sources as shown on GE drawing 828E445CA, Sheet 4, Revision 2.
r Therefore, when the Electrical Protection Assembly (EPA) for Panel 1C71-P001 trippe'd, power was lost to the two controlling MStV solenoids instead of only one solenoid thereby causing the MSIV to close resulting in the Reactor Protection L
System to initiate a scram.
Based on a detailed review of drawings B 208 013, Sheets HOS, H10 and H11, B 208-e 040, Sheets A09 and A10, and B 208 041, Sheets B01 and 802, the drawing anomaly
-for the RPS power supply to the MSIV solenoids was determined to be an isolated case. Ho' wever, in order to further confirm the randomness of this anomaly y
between the gal and GE design drawings, an in depth review on all systems supplied by RPS distribution panels 1C71 P001 and 1C71 P002 was performed.
These systems comprise C71 A - Reactor Protection System, C71B Reactor Protection System MG Sets, B21H Nuclear Steam Supply Shut-off System, and C51 A - Startup Range Neutron Monitoring System. The objective of the review was to determine if the design configuration depicted on the latest GE elementary wiring diagram (EWD) had been correctly and completely transferred to the corresponding gal
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elementary wiring diagram.
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PY-CEI/01E-0277 L The review included confirmation of:
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- 1. Power supply assignment and references.
- 2. ' Divisional assignment.
- 3. Panel and termination cabinet assignment.
- 4. Schematic representation.
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- 5. Notes and instructions. summarizes, by drawing, the results of the review. The review l
confirmed that there were no additional drawing discrepancies which affect wiring, power supply, separation or component / system function. No additional physical wiring, termination or control changes are required except for the RPS power supply changes to 1C71-P001 and 1C71-P002.
- A total of 75 gal elementary diagrams were reviewed along with the corresponding GE EWD's. Of the 75 drawings,51 drawings had no discrepancies between the GE and GAI elementaries. On three drawings differences existed between the GE drawings and gal drawings B21-H07, C51-A26 and C71-A12. The gal drawings reflected the correct design. Other than the error on Sheet 821-H05 which was the initiating problem causing the scram, there were no other power supply, separation, or termination or wiring discrepancies identified.
l The remaining discrepancies involve minor differences in notes, instructions, and schematic format which do not affect wiring / function, separation, or design intent.
i Therefore, the conclusion is that the anomaly between the GE and gal elementary for the RP5 power supply to the MSIV solenoids was an isolated case.
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PY-CEI/0IE-0277 L Attat.hment 1 gal /GE Elementary Wiring Diagrams Review Summary Systems C71 A, C718, B21 H, C51 A Drawing
- Discrepancy Drawina Tvoe Comment B 208-013(B21H)
Sheet H01 None H02 5
Update relay tabulation references.
Wiring / Function unaffected.
H03 None H04 5
Update switch 574 and 575 contact references. Wiring / Function unaffected.
H05 1
Initiating probiem causing scram.
Revise drawing & wiring per GE EWD.
H06 5
Revise relay reference C71 K11 A to read C71 A K11 A. Wiring / Function unaffected, H07 4
GE EWD shows incorrect contact numbers. gal EWD corrects contact numberto be consistent with relay manufacturer & type. Wiring / function unaffected.
HO8 None HO9 None H10 None H11 None H12 None H13 None H14 None l
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1-L o
l PY-CEI/01E-0277 L Drawing
- Discrepancy Drawina Tvoe Comment H15 None H16'
' Sheet Deleted - N/A H17 None H18 None H18.
None H19 None H2O None H21 5
Panel 1 H13-P622 reference n'issing.
Wiring / function unaffected.
H22 None H23 None H24 None H25 None H26 None H27 None H28 None H29 None j
H30 None H31 None H32 None H33 None H34 None H35 None H36 None Attachnent 2 PY-CEI/01E-0277 L Drawing
- Discrepancy Drawino Type Comment E 828E445CA, Sheet 3,3A 4
Terminal blocks shown versus cable iAl R61 Annunciator System) plugs. Wiring / function unaffected.
B 208 037(C51 A)
Sheet A01 5
Panel number transposed in notes (P701 B - P7108). Wiring / Function unaffected.
A02 None A03 None A04 Sheet Deleted - N/A A05 None A06 None A07 None A08 4
Shield ground to signal common not Wiring unaffected.ysically installed.
shown on EWD. Ph A09 Sheet Deleted - N/A A10 Sheet Deleted - N/A A11 Sheet Deleted - N/A A12 5
Cablejack reference missing' Wiring unaffected.
A13 5
Cable jack reference missing. Wiring unaffected.
A14 4
Switch schematic representation different. Internal wiring / function unaffected.
A15 4
Cable jack reference missing. Switch internal schematic representation different.
-b PY-CEI/01E-0277 L Drawing
- Discrepancy Drawing Type Comment
~A16 Sheet Deleted - N/A A17 Sheet Deleted - N/A A18 Sheet Deleted - N/A A19 Sheet Deleted -N/A
'A20 None A2?
None A22 Sheet Deleted - N/A A23 Sheet Deleted - N/A A24 4'
ind, lights terminal numbers reversed.
Wiring / function unaffected.
A25 4
Ind,li histerminal numbers reversed.
Wirin / function unaffected.
A26 5
GE shows incorrect wiring to (2) meters. gal drawing corrects wiring to meters.
5
. -Term, block & fuse reference missing.
A27 f
Wiring /functilin unaffected,.
/-
3, A28 None A29 None A30 None A31 5
Reference to pre fab cable ID riumber incorrect. Wiring / function unaffected.
B.208 040 (C71 A)
- 4.
Sheet A01 5
Update references on index sheet per gal EWD's. Wiring / function unaffected, j
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Attachnent 2 PY-CEI/OIE-0277 L Drawing
- Discrepancy Drawina Type-Comment A02 5
Update references on relay tabulation sheet. Wiring / function unaffected.
e A03 None A04 5
Revise Figure 6,125 VAC to read 120 VAC. Wiring / Function unaffected.
A05 None Switch change documented by DCP-86-0216.
A06 None Switch change documented by DCP-86 0216.
A07 None Switch change documented by DCP-86-0216.
A08 N ne Switch change documented by DCP-86-0216.
A09 None i
A10 None I
All None A12 4
GE drawing incorrectly labeled relay design ation., drawing corrects conta contact. GAI i
A13 5
Revisa reference to plug / jack number.
i Wiring / function unaffected.
A14 None A15 None I
A16 None s
E 828E53CA Sheet 12,13,14 4
gal shows terminal blocks versus cable iAlR61 AnnunciatorSystem) plugs. Wiring / function unaffected.
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5-
g PY-CEI/01E-0277 L Drawing
- Discrepancy l
Rewina Type Comment I.
5-208 041(C718)
Sheet 801 None 802-None i.
f Discrepancy Type:
- 1. Power supply assignment and references.
- 2. Divisionalassignment.
- 3. Panel and termination cabinet assignment.
- 4. Schematic representation.
- 5. Notes, instructions and drawing interface references.
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