ML20246C615
| ML20246C615 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 06/28/1989 |
| From: | Sterud C CONTROL COMPONENTS, INC. |
| To: | Cross D GEORGIA POWER CO. |
| References | |
| REF-PT21-89 NUDOCS 8907110083 | |
| Download: ML20246C615 (2) | |
Text
,
.y '
3.
Control Components Inc.
AnIMIvalvecompany Fi.": yerm,. W s
June 28, 1989 0 bN Tl.':,3Q0 dtYfs'
~
Mr. Don Cross Georgia Power Company Alvin W. Vogtle Nuclear Plant
Subject:
Atmospheric Dump Valves CCI W.O.# 23469-1,2 Potential Significant Deficiency Under 10CFR-21
Reference:
APS - Palo Verde Telecon 3/28/89
Dear Mr. Cross:
We are hereby notifying you of a potential significant deficiency that may be reportable under the requirements of 10CFR-21.
We are not re-porting this directly to the Nuclear Regulatory Commission (NRC).
We at CCI do not have the systems expertise that would permit us to de-cide if this is a significant deficiency.
However, because of the NRC's interest and their prior contact for information regarding plants with a similar design, we have sent a copy to Rich Lobel of the Events Assessments group in Washington D.C.
On March 28, 1989 we sent you a letter stating that there was suffi-cient actuator force to overcome a potential high load required to open the subject valve.
This was based on the assumption that the ca-pability of the actuator was 20,000 lbs.
The 20,000 lbs is in error.
The maximum actuator load available is 13,620 lbs.
The actuator load g
required (worst case) is approximately 13,408 lbs.
It is necessary to modify the trin inside the valve to reduce the maximum potential load required to open.
We have a modified trim design with which the maxi-
,d i
mum load required to open (worst case) would be approximately 5,800 lbs.
i I
i I
t 4
I g
s997110083 890628 PDR ADOCK 05000424 g 0 g
PDC 1
22591 Avenda Empresa O Rancho Santa Marganta. Cahfornia 92688 Telephone. (714) 858-1877 O FAX (714) 858-18n O Teler 685500
}
i
,:'FOgo 2 l..,
, C@o,rgio POwcr'Compnny n.,<
ls; l
.Please contact myself, Ron Adams,-Larry Stratton or Herbert Miller at CCI if you should have any questions or need additional information.
L-Sincerely, CONTROL' COMPONENTS INC.
h sl1 A
f/
Curtis G. Sterud-Principal Engineer
/jf cc:
HLMiller LRStratton REAdams RTremblay CONTROL COMPONENTS INC
.. _ _ _ _ _ _ _ - _ _ - _ _ _ _ _ _ _ - - - _