ML20209G375
| ML20209G375 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 04/24/1987 |
| From: | Russell Gibbs, Meers B, Murphy M TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20209G315 | List: |
| References | |
| 302.06-SQN, 302.06-SQN-R03, 302.06-SQN-R3, NUDOCS 8704300535 | |
| Download: ML20209G375 (5) | |
Text
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TVA EMPLOYEE CONCERNS REPORT NUMBER: 302.06-SQN SPECIAL PROGRAM REPORT TYPE: Sequoyah Nuclear Plant-Element REVISION NUMBER: 3 TITLE: Transfer Canal Electrical Equipment Problem REASON FOR REVISION: Revised to incorporate SRP comments Revision 1 Revised to reflect a scope change for Revision 2 Employee Concern SQP-6-Oll-001 Revised to incorporate drawing /
Revision 3 configuration check PREPARATION PREPARED BY: & %p
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REVIEWS DATE PEER:
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iDATE MANAGER OF NUCLEAR POWER DATE CONCURRENCE (FINAL REPORT ONLY) 1443T 8704300535 870427 PDR ADOCK 05000327 i
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e TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR PLANT EMPLOYEE CONCERNS TASK GROUP OPERATIONS CEG Subcategory: Cable and Conduit Element: Transfer Canal Electrical Equipment Problem Report Number: 302.06 - SQN Revision 3 Concern Numbers: SQP-5-004-002 SQP-6-011-001
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O, I/F4/07 B. Meers #3 r.
'Date Reviewed by:
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Ravision 3
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Transfer Canal Electrical Equipment Problem This report evaluates the concern that the electrical equipment in the fuel transfer canal is not installed according to the drawings and the-concern that there are no fuel transfer system "as-constructed" drawings.
II.
Specific Evaluation Methodology This element is made up of two K-forms:
"SQP-5-004-002 - The configuration of the electrical equipment in the Transfer Canal is not per the drawing. Details known to QTC and withheld to maintain confidentiality.
Nuclear Power concern. No further information may be released. CI has no further information."
"SQP-6-011-001 - The fuel transfer system was upgraded from non-QA to a QA Level II; however, there are no "as-constructed" drawings. Nuclear Power concern. CI has no further information."
The K-forms were' reviewed to determine the area of concern. The referenced documents were reviewed to determine the requirements and testing conditions of fuel transfer equipment presently located in the
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transfer canal. The Engineering Change Notices (ECN) authorizing the equipment modifications and the associated installation and testing workplans were reviewed. As-constructed drawings referenced in the workplans were reviewed to verify as-constructed configuration following completion of the work plans. This was done by comparing drawings obtained from the Drawing Control Center with the respective workplans.
Interviews were held with cognizant engineers in SQN Systems Engineering to evaluate the testing history of the equipment in question. It was not necessary to review any " upper tier" documents, l
work requests, regulatory! requirements, or NCRs'.
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l III. Findings
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Following initial conatruction, the electrical equipment in the L
transfer canal was tested by Preoperational tests W-7.2B Unit 1 and FY+
W-7.2B Unit 2 (references 1 and 2).
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The equipment tested by these Preoperational Tests was subsequently replaced with the presently existing equipment bbc'ause of water leakage into the air motors and limit switches. This was done by authority of ECN L5667 R0 (reference 3).
Several workplans were involved in completion of ECN L5867 (reference 8).
These workplans were reviewed together with current as-constructed drawings. The as-constructed drawings have all been updated as specified in the workplans.
Following the modification, the new equipment including the electrical equipment j
now in question was tested by Post Modifications Test (PMT) - 48.
This i
was done by Workplan 10736 and 11561 for Unit 1 (references 4 and 5) and by Workplan 11177 for Unit 2 (reference 6).
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Page 1 of 3
A Rsvisica 3
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III. Findings (Continued)
Administrative Instruction AI-19 provides for "As-Constructing" drawings following modification by workplan.
(reference 7).
See also ECTG report 307.04, "Workplan Process" (reference 9).
Subsequent to reviewing the as-built drawings ECTG requested assistance l
from the Systems Engineering Group to perform a selected review of the IR3 as-built configuration of the fuel transfer system pit side panel and to l
confirm the as-built configuration of the equipment. No significant l
discrepancies were noted during this review.
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Conclusions:==
Workplans and as-constructed drawings regarding the installation of new fuel transfer equipment were reviewed and compared. All drawings were found to be in agreement with the workplans referenced and were correctly as-constructed.
The concerns SQP-5-004-002 and SQP-6-011-001 are determined to be not valid.
IV.
Root Cause None V.
Generic Applicability No problem with "as-constructed" drawings for the fuel transfer system was identified at SQN. A sample review of WBN fuel transfer system drawings indicated "as-constructed" drawings exist; therefore, this issue is not generic to WBN and no detailed evaluation will be conducted.
VI.
References 1.
SQN Preoperational Test Data Package W-7.2B for Unit 1 l
2.
SQN Preoperational Test Data Package W-7.2B for Unit 2 l
3.
Post Modifications Test 48 Workplan 10736 for Unit 1 5.
Post Modifications Test 48, Workplan 11177 for Unit 2 6.
Post Modifications Test 48 Workplan 11561 for Unit 1 i
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R;visien 3 VI.
References (Continued) 7.
SQN Administrative Instruction AI-19, Part IV, " Plant Modifications: After Licensing," Revision 18, dated July 7, 1986.
'I 8.
Workplans 10341, 10646, 10664, 10994, and 11041.
9.
Employee Concerns Task Group Report 307.04, "Workplan Process,"
Revision 4, dated December 11, 1986.
VII.
Immediate or Long Term Corrective Action None l
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