ML20040B861
| ML20040B861 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 01/11/1982 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8201260488 | |
| Download: ML20040B861 (2) | |
Text
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TENNESSEE,{ ALLEY AUTHORITY r
CH ATT N OdG AT.T E N N E S SE C 3 7 4 01 2
400 Chestnut Street Tower II MN l8 Jdnkcy l1 1982
-mi'4h BLRD-50-438/81-10
/
BLRD-50-439/G1-1G
" 7 ?x
/
\\
Mr. James P. O'Reilly, Director p.
Office of Inspection and Cnforcement I
U.S. Nuclear Regulatory Commission j
Region II - Suite 3100
/
101 Marietta Street Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - MISLOCATION OF FLOW CHARACTERISTIC INDICATORS - BLRD-50-438/81-10, BLRD-50-439/81 REVISED FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. W. Wright on January 9, 1981 in accordance with 10 CFR 50.55(e) as NCR BLN BLP 8016. This was followed by our final report dated February 9, 1981.
As discussed with R. V. Crlenjak by telephone on Decembe.' 31, 1981, enclosed is our revised final report, The reason for the revision is to change the expected completion date cf the corrective action.
'."he date for completion has been delayed because revisions on all the drawings involved are not complete. The corrective action on this matter will be completed by February 2, 1982.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, nager Nuclear Regulation and Safety Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 8201260488 82011 PDR ADOCh 0500045'8 4.W, 1AL COI'Y S
PDR An i qua oxortunny imp % er in
J ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 MISL0 CATION OF FLOW CHARACTERISTIC INDICATORS BLRD-50-438/81-10, BLRD-50-439/81-10 10 CFR 50.55(e)
REVISED FINAL REPORT Description of Deficiency Temperature wells on the Component Cooling Water System (CCST are used to determine the need to redirect CCS flow and bypass the CCS heat exchanger. The wells are incorrectly located in TVA piping drawings (which do not accurately reflect the design criteria diagram). These piping drawings place the temperature wells upstream of the component cooling water bypass rather than downstream. Specifically, the following temperature wells are incorrectly located:
1KC-ITW-006B-A 2KC-ITW-006B-A 1KC-ITW-007B-B 2KC-ITW-007B-S in addition, two flow elements are incorrectly located.
Flow element 1KC-lFE-007-B is incorrectly located upstream of the component cooling water cooler bypass discharge. Flow element 2KC-IFE-007-B is located too close to the component cooling water bypass discharge per manufacturer's spec ification.
Safety Implications Upon detection of a certain temperature by a thermocouple in the temperature well, a sigaal is initiated and the component cooling water valve is actuated by the control room operator if needed. Had this deficiency remained uncorrected, the actual temperature of coolant parsing into the CCS would not have been accrrately reflected.
This condition could have adversely affected the safe operation of the plant.
, Corrective Action An Engineering Change Notice (ECN 1200) has been written which will reflect the proper positions of the temperature wells and flow elements.
The ECN will be included in revision of design drawings and the corrected design drawings will be reissued to the field for implementation. A memorandum was released within TVA on February 4, 1981 which alerts TVA checkers to this type of oversight.
The above drawing revisions will be completed by TVA by February 2, 1982.
The actual field imp? cmentation of these revisions will be completed by July 6, 1982.
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