ML20083A888
| ML20083A888 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 12/13/1983 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8312200441 | |
| Download: ML20083A888 (2) | |
Text
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g, TENNESistE"VALLEt AUTHORITY
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SH TTANOOGAh Y NbESSEE 374o1 400 Chestnut Street Tower II NON Dhof er 13, 1983 BLRD-50-438/81-76 BLRD-50-439/81-75 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW,-Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - VIKING FLOW CONTROL VALVES IN FIRE PT.0TECTION SYSTEM - BLRD-50-438/81-76, BLRD-50-439/81 FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on November 24, 1981 in accordance with 10 CFR 50.55(e) as NCR BLN MEB 8103 This was followed by our interim reports dated
-December 22, 1981, and March 1, June 7, and' October 4,1982, and January 14, June 7, and August 8, 1983 Enclosed is our final
. report. We consider 10 CFR Part 21 applicable to this deficiency.
If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Licensing Enclosure oc (Enclosure):
Mr. Richard C. DeYoung, Director -
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 IEETFICIAL COPY e.-
M2 7 B312200441 831213 I
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PDR ADOCK 05000438 S
PM A
1983-TVA 5OTH ANNIVERSARY An Equal Opportunity Employer
y ENCLOSURE a
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 VIKING FLOW CONTROL VALVES IN HIGH PRESSURE FIRE PROTECTION SYSTEM -
BLRD-50-438/81-76, BLRD-50-439/81-75 NCR BLN MEB 8103 10 CFR 50.55(e)
FINAL REPORT Description of Deficiency The Viking model G-1 and G-2 flow control valves which are used in preaction sprinkler systems will not regulate outlet pressure to 25 lb/in2 as required by the acceptance criteria in Preoperational Test PT-RF-01.
Severe system vibrations occur when attempts are made to regulate the valves under the high inlet pressure and low flow conditions established by the Preoperational Test. These conditions
. are equivalent to those that would result if water was flowing from a single sprinkler head.
The model G-1 and G-2 flow control valves are manufactured by Viking Corporation of Hastings, Michigan. The manufacturer's catalog literature indicates that the valves will regulate outlet pressure as 2
low as 25 lb/in. However, the literature did not indicate that the valves would not regulate properly under the conditions TVA is establishing during preoperational testing (i.e., high inlet pressure and low flow).
The manufacturer's catalog literature states that the valves can be used to control water pressure on sprinkler systems. This statement led TVA to believe that the valves would function properly for flows equivalent to a single sprinkler head when the valves are sized in accordance with the manufacturer's Technical Bulletin No. 4041 for the maximum design flows dictated by National Fire Protection Association Standard No.13 In verbal discussions with a representative of the manufacturer, we were assured that the valves would regulate properly under such low flow conditions for pressures up to the maximum working pressure for which they are rated.
Safety Implications The severe vibrations induced by the flow control valves can cause damage to the sprinkler system piping and impair the system's function. Failure of the sprinkler system could, in the event of a fire, allow spreading of the fire which could compromise safety-related systems and thereby adversely affect the safe operation of the plant.. A system failure could also result in water or mechanical damage to safety-related equipment located near the damaged piping.
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