ML20072S559
| ML20072S559 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 04/01/1983 |
| 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 8304070236 | |
| Download: ML20072S559 (2) | |
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TENNESSEE VALLEY AUTHORITY fdd'5AestniA 39setYow!Pfi April 1, 1983 BLRD-50-438/82-73 BLRD-50-439/82-67 c,,
u U.S. Nuclear Regulatory Commission 3
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Attn:
Mr. James P. O'Reilly, Regional Administrator
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101 Marietta Stre'et, NW, Suite 2900 c tv Atlanta, Georgia 30303 E3 rn E;
Dear Mr. O'Reilly:
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BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - FINS AND HEADS ON STAR MODEL QE SPRINKLER HEADS - SECOND INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on October 26, 1982 in accordance with 10 CFR 50.55(e) as NCR BLN MEB 8208. Enclosed is our second interim report. For disposition purposes, NCRs BLN MEB 8208 and WBN MEB 8204 are now being handled independently. Therefore, a separate interim report will be submitted for WBN MEB 8204. We expect to submit our next report on or about December 5, 1983 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 J.
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L. M. Mills, ager Nuclear Licensing Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Records Center (Enclosure)
Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 fi AL COP 1%
8304070236 830401
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PDR ADOCK 05000438 fEg S
PDR An Equal Opportunity Employer
ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 FINS AND HEADS ON STAR MODEL QE SPRINKLER HEADS NCR BLN MEB 8208 BLRD-50-438/82-73, BLRD-50-439/82-67 ~~
SECOND INTERIM REPORT Description of Deficiency Star Model QE sprinkler heads have been used in fire suppression systems located in various areas of the plant. Two problems associated with the heat collecting fins on these heads have been brought to TVA's attention by Factory Mutual Research Corporation. First, the fins can be easily bent preventing the heads from opening during a fire. The upright sprinkler heads are more susceptible to this type of failure than pendant heads.
Second, the center strut on the heads corrode at the mounting point for the heat collecting fins. This produces an insulating effect which can change the head's temperature setpoint and operating time.
Factory Mutual Research Corporation has also retracted their approval of the Star Model QE sprinkler heads on the basis of these problems and has recommended that they be replaced.
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Interim Progress Star model QE sprinkler heads will be replaced in all areas of the plant with Star model H sprinkler heads or the equivalent. The replacement will
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~be accomplished ~under Engirieering ~ Change Notice-(ECN) 1728.
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Since only a few of the model QE heads have been installed at Bellefonte to date, their replacements _will be largely installed during the normal. course.,
of sprinkler system construction. All replacement heads will be in place before the fuel loading of the respective unit into which the sprinkler system is to be installed. coTV/.'s final report will specify -the schedule.
for these replace =ents.
A final report on this subject will be submitted on December 5,1983, upon closure of ECN 1728 and the release of the procurement documents for the replacement sprinkler heads.
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