ML20209G140
| ML20209G140 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 08/04/1986 |
| From: | Lagergren W, Mcvay J, Meers B TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20209G085 | List: |
| References | |
| 1443T, 302.06-SQN, NUDOCS 8609120377 | |
| Download: ML20209G140 (3) | |
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i TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR PLANT EMPLOYEE CONCERNS TASK GROUP OPERATIONS CEG Cable and Conduit Subcategory:,
Element: Transfer Canal Electrical Equipment Problem Report Number:
302.06 - SQN B.
7-Y-k 5 W
Evaluator:
,7 B. Meers Date Reviewed by:
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W.R.Lagyrdren
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I.
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 the same electrical equipment was tested using inadequate "Information Only" drawings.
The scope of this report is limited to the evaluation of electrical e;
equipment presently found in the fuel transfeb canal and used in the process of fuel transfer.
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 the electrical equipment presently located in the transfer canal. The Engineering Change Notice (ECN) authorizing the equipment modification and the testing workplan were reviewed.
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, work requetts, regulatcry requirements, or NCRs.
III.
Findings Following initial construction, the electrical equipment in the transfer canal was tested by Preoperational tests W-7.20 Unit 1 and
'l W-7.20 Unit 2 (References 1 and 2).
The equipment tested by these Prooperational Tests was subsequently replaced with the presently existing equipment. This was done by authority of ECN L5067 R0 (Reference 3).
Following the modification, the new equipment including the electrical equipment now in question was tested by Post Modifications Test (PMf) - 40.
This was done by Workplan 10736 for Unit 1 (Reference 4) and by Workplan 11177 for Unit 2 (Reference 5).
Cognizant engineers in SQN Systems Engineering stated that the only electrical equipment now in the transfer canal is one limit switch por unit and that they were satisfactorily tested and l
conformed to the drawings. The cognizant engineers also stated that'~
"Information Only" drawings which had been verified correct by Page 1 of 2 l
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III. Findings (Continued) comparison with the drawings used for installation were used for testing. This procedure is necessary because only one official drawing (or set of drawings) is used in the installation Workplan.
If changes are made during installation (authorized only by approved changes),
they are noted, in ink, on the installation Workplan copies and transfered later to the PMT copy - this eliminates any drawing
' differences and the PMr drawings are effectively "As Constructed" a
copies. The installation Workplan must be complete before any testing is started. This assures that the drawings will not be further changed as a result of the installation Workplan.
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Conclusions:==
No problems were identified concerning the testing of the electrical equipment now located in the transfer canal.
The concern probably was
, expressed to be lack of knowledge of the details of Workplan procedure and Post Modification Testing procedure.
The concerns are determined to be not valid.
IV.
Root Cause None i
V.
Generic Applicability This concern had been determined to be generically applicable to WBN.
The evaluation for WON is contained in a separate report.
VI.
References 1.
SQN Preoperational Test Data Package W-7.2B for Unit 1
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2.
SQN Preoperational Test Data Package W-7.2B for Unit 2
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3.
ECN L5867 RO Post Nodifications Test 84, Workplan Ib736 for Unit 1 4.
5.
Post Modifications Test 84, Workplan 11177 for Unit 2 VII.
Immediate or Long Term Corrective Action None Page 2 of 2