ML20086U467
| ML20086U467 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 06/07/1995 |
| From: | GEORGIA POWER CO. |
| To: | |
| References | |
| OLA-3-A-092, OLA-3-A-92, NUDOCS 9508040111 | |
| Download: ML20086U467 (10) | |
Text
.
Attc hment A % q O-NF '/25 - OQ1 -3 00CKETED i
USHRC ff( gy, y __yg f7/93 A -9Z 95 x la k9 S1 LJAda sys. p RISTORY OF DG PNEUMARIetrotffAf1
~
DOW{ggj[Cfi IT HAS BEEN STATED THAT V0GTLE HAS LO DG PROBLEMS.
~
NUREG-1410 LISTS 69 CALCON SENSOR FAILUR h
1 PRESENTATION WILL COVER 3 AREAS:
CALCON TEMPERATURE SWITCNES j
CALCON PRESSURE SWITCNES i
IN ADDITION, WE HAVE BEEN REQUESTED TO ADDRES RECENT PROBLEMS WITH COOPER STARTING AIR ADMISSION VALVES FOLLOWING A PRESENTATION OF THE HISTQ TECHNICAL FACTS RELATED TO THESc 3 SEP PROBLEMS, OUR CONCLUSION IS THAT:
i NO CLEAR PRECURSORS TO THE 3/20/9 ARE EVIDENT FROM A REVIEW OF THE' P SENSOR WORK HISTORY.
GPC DID DO THOROUGH TESTING'AND 3 GENERIC COMPONENT DEFICIENC SUPPLIED COMPONENTS.
GPC DID NOTIFY OTHER OWNERS OF AND SOLUTIONS.
J l
9509040111 950607
{DR ADOCK 05000424 PDR
j':.^-
g 4
1
+.
d e-
)%
t w
h s
D h
g'
\\
N n
a v
8 OoS I
e3tm s ts w e:s ss-a c. d s
o a -
6
& W g
g
$jl,
\\
h ME!A$ISIl
Ie CALCON TEMPERATURE SENSOR i
MODEL A3500-W3 L
TOP PLATE e
0-RING DISK 5 HAFT POPPET DISK POPPET g
AIR INLET r POPPET SPRING BASE GASKET g
\\N, SPRING RETAINER l
VENT PORT i
'5EN50R TENSION SPRIN iROTATED)
BASE SENSOR DISK 5 EXPAND AS SPACER TUBE TEMPERATURE INCREASES. THEREBY PULLING THE POPPET DISK DOWN ONTO THE POPPET. AS THE POPPET IS PUSHED DOWNVARD. THE AIR ESCAPE 5 THROUGH THE VENT.
AS THE TEMPERATURE DECREASES, SENSOR DISK 5 THE SENSOR DISK 5 CONTRACT. THE SENSOR TENSION SPRING PUSHE5 6
UPWARD AGAINST THE SPRING RETAINER.6 VHICH PUSHE5 THE POPPET DISK v
UPWARD OFF THE POPPET. THE AIR SUPPLY AND POPPET SPRING PUSH THE POPPET BACK INTO THE POPPET HOLE.
i 4
SUIMARY OF DIESEL GENERATOR TEMPERATURE SENSOR PROBLEMS AT V0GTLE UNIT 1 UNIT 2 UNIT 1 1R1 UNIT 1 CYCLE 2 POST EVENT CONSTRUCTION CONSTRUCTION (9/88-10/88)
PRE-OUTAGE DUTAGE PRE-EVENT 3/20-3/25/90 (NSTRUMENT FUNCTIdM PROBLEM (8/85-12/86)
(1/88-12/88) 2 4
4 J. W. Temp.
Out-of-cal.
8 7
l' 6
J. W. Temp.
Defective 1
1 1
I L. O. Temp.
Out-of-cal.
l l
1 10 Brg. Temp.
Defective mummmmmmmmes Misc.
3 f
Vib. Snsrs.
Defective e
~~-
" - - - - - ^ - - - - - -
4 9
JACKET WATER SWITCH PROGRAM RESULTS INSUFFICIENT TEMPERATURE STABILIZATION PERIOD PRIOR TO CALIBRATION.
CONTAMINANTS ON THE TEMPERATURE SENSO CALIBRATION BATH HEATUP RATE.
THERM 0WELL SETSCREW TIGHTNESS.
SPACER-TUBE TIGHTNESS.
INTERNAL CONTAMINANTS.
O I
b JACKET WATER TEMPERATURE SWITCH PROBLEMS t
Roor CAUSE INTERNAL CONTAMINATION CAN CAUSE SWITCH TO CONTINUOUSLY VENT.
CALIBRATION OF THE SWITCHES WAS INADEQUATE.
J CORRECTIVE ACTION CALIBRATION PROCEDURE THAT CLEANS AND PROPERLY CONTROLS THE CALIBRATION REQUIREMENTS.
RELIABILITY OF THE BASIC SWITCH COMPONENT WAS ESTABLISHED.
l SWITCHES HAVE BEEN DEFEATED IN THE EMERGENCY START MODE.
CURRENTLY EVALUATING REPLACEMENT.
~
SIGNIFICANCE OF PROELEM INADEQUATE CALIBRATION PROCEDURES AND TECHNIQU l
RESULTED IN REDUCED RELIABILITY OF THE EMERGE DIESEL GENERATORS.
i CONCLUSION BEGINNING WITH PROBLEMS ENCOUNTERED DURING TH FIRST UNIT 1 REFUELING IN 1988, GPC MAS TAKEN A SERIES OF ACTIONS TO RESOLVE DG TEMPERATURE SWITCH MALFUNCTIONS.
i
i WTES:
l i
l 1. 'A' = Wem asa,tsassa 945 FIEES Mr&IR.
3.
E M BICR M ImprtuG paars W W SEN CORRIuG G 333-1 3
- SacTITE 4 M 1/4379
- 4370 4340 4390 bh 4395 SSpeteNG IIS AS.4 84 7
' eve es, 430 seus 8 4381 as 1
A Y 4375 333 D1Armange 4383 1
A 4394 4370 MAD 1
A 4300 passages FEAR 4
345 Q.==- '
4 4378 4379e 1M7 C
l 4366 A
v 393 segIng A33ggg gaggy 4337 e,,.
WhtVE SECilOSE+4884 go,' see me
'eesse 4
se-essee 1
A i
1 A
373 I>trag f> a--
1 A
3841 TEWF SEAL fERFr """""4 1
A 1967 37t25G 1
A
- apr = ===m1 1
MS9 O-3330 1
A l
antt 1
A 4364 Alh30eTER stat assesLY f
ants
= w -u 6 1
A I
A 4M8 alhpugTER SC33r anal
~=T 1
A 1
4377 SPRE818 EDustsIG 1
A 4379 MIRetus StaETE 1
A amas
- --s 439e WM 1
A Wm8#3 perps?
rw g
A
- 439, gygEEG SERT 1
anta 1
A 4993 abgerlAM 4395 artfuG 34400 lPtESSURE SEli50R Sul ASSENILIES 7*"*if 1
~
SUMMARY
OF DIESEL GENERATOR l
PRESSURE SENSOR PROBLEMS AT V0GTLE UNIT 1 UNIT 2 UNIT 1 1R1 l UNIT 1 1RZ lPOSTEVENT
- MSTRUMENT CONSTRUCTION CONSTRUCTION (9/88-10/88)
PRE-OUTAGE OUTAGE PRE-EVENT 3/20-3/25/90 UNCTION PROBLEM (8/85-12/86)
(1/88-12/88) 2 L. O. Pres.
Out-of-cal.
4 1
L. O. Pres.
Defective 1
T. O. Pres.
Out-of-cal.
1 1
1 T. O. Pres.
Defective I
M. P. (P-3)
Out-of-cal.
1 1
- M. P. (P-3)
Defective i
1
~~
~-
-~ -.
i s,-..
r i
DIESEL GENERATOR CALCON PRESSURE SWITCHE j
10CFR PART 21 (MAY 1988)
" DEVICES THAT ARE ALREADY INSTALLED AND. OPER i
AFTER SEVERAL-HOURS BE W EEN TESTS HAVE DEM IMO DELAVAL RECO>t4 ENDS THAT ALL l
THEIR RELIABILITY.
DEVICES NOT INSTALLED, OR THAT ARE INSTALLED BUT HAVE
~
NOT OPERATED FOR SEVERAL HOURS BEWEEN TESTS, BE l
RETURNED TO.IMO DELAVAL FOR REMACHINING, INSPECTION AND TESTING."
10CFR PART 21 (JUNE 8.1990. AnorNouM 3)
-i 12, 1988 MAY HAVE BEEN 3
"OuR REC 0t#4ENDATION OF MAY CONFUSING AND IN LIGHT OF THIS FAILURE AFTER 9 YEA i
IT IS APPROPRIATE TO RESTATE OUR REC 0t#4END COOPER INDUSTRIES REC 0044 ENDS THAT ALL COOPER P/N F-573-156,.BE MODIFIED OR REPLACED
- DEVICES, BY DEVICES IDENTIFIED AS CALCON'P/N B4400 t
l I
b PRESSURE SWITCH FAILURE ANALYSIS R 4
- Roor CAUSE MIS-INTERPRETATION OF PART 21 (MAY 19 CORRECTIVE ACTION
)
ALL CALCON PRESSURE SWITCHES HAVE BE SIGNIFICANCE OF PROBLEM STICKING PRESSURE SWITCHES COULD HAV IN REDUCED RELIABILITY OF THE EMERGE GENERATORS.
_ CONCLUSION AS A RESULT OF THE GPC Root CAUSE EV A PRESSURE SWITCH PROBLEM IN 1990, THE VENDO CLARIFIED AND REISSUED THE 10CFR21 NOT l
I