ML19308C935
| ML19308C935 | |
| Person / Time | |
|---|---|
| Site: | Crane, Davis Besse  |
| Issue date: | 11/07/1977 |
| From: | Ellison K, Halsted D, Laner J BABCOCK & WILCOX CO. |
| To: | |
| References | |
| TASK-TF, TASK-TMR PROB-771107, NUDOCS 8002110675 | |
| Download: ML19308C935 (16) | |
Text
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j Babcock &Vlilcox Noeleer Power G e n e r o*J e n Division i
Lynchburg. Virginio 24305 g
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desse Pol 2v II/ z/ 77 Please do not roll or fold!
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, SITE Pr.03LDi f
REPORT TRANS}!ITTAL e*** CLEARED ****
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13-14 TT6 TO:
Cha..ga Control For Distribution CONTRACT NC:
620-00 h S.11. Klein
- Quality Assurance SPR
<3 Ib Central Eneineering Files g
O. 8972CHJet. - Task Engineer gg g y
.J. M e F
- Proieet t!ananer s
DATE:
J/.2 7[7 J' STATUS CODE C
L. C. Rogers - MET. ED.
F. R. Taist - TOLEDO J. R. Bohart - Incl. Support J. L. Donnell - 0FR B. A. Karrasch - Plant Integration Attached is one copy of Site Probics Report No.
c3 7d which was processed on Contract 620-00
/Y Future ' ontracts have been reviewed for the c
potential of a similar problem. This prob 1cm C/is not considered applicable to other contracts RDIARKS:
'2.'-
WCLEAR SET 3 ICE SUPPORT ENGINEER
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S;.a so, c.g o.,p Y.,- i Toledo Edison Co=pany F.R.Faist 11/2/77 13 -
620-00lk k.,i g
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No.
VEND 02 Crosby 023 090 Is 28/0h1/005
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i PROSLEM CONTACT qf [y l
g Teil.E (914 30 CHAAACTERS)
Electror.atic Relief Valve Modification J. E. Anderso t U-A.Y,'.,l,. L,l".* (
.7 DE S C R I P T 101: OF PROSLEM:
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See attached sheet.-
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STATUS-ACTION TO DATE, I NCLU 0 i tlG P ERSOM S CO N T AC T E0: Lynb. Engineering is aware of a
g S. A. reana, Lynb., and J. A. Lauer, Prof. Mgm. know of this prob-this problem.
len.
T. D. Mtarray and B. R. Beyer, TEco, are also aware of the problem.
FURTHER ACTION RECOHHENDED SY SITE PERSONNEL:
1 Lynb.,m.ngaueering should review Crosby installation, operating and =aintenance instructions flo. I - 1115, Sect h.2' vith the Crosby vend::r to deternine if these instructions vill give the proper pilot valvt stem adjustment when actuated.
2.
Engineering to trovide additional L
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recou:nendation and concurrence with action taken.
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3AiE COM*LETE3: 3/'i4/76 rect and vill not.be revised.
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Descristien of Preble=:
L on 10/13/77, the electromatic relief valve was tested after the completion of repairs as outlin-21 in ST2 #369. Se velve v2: cycled six ti=es succes:-
fully. On the seventh test cycle the pilot valve did not close. De ERV was isdated and permitted to cool down while waiting for Crosby representa-
-tives.
Crosby rep., Walt Conroy, arrived and the pilot valve asse=bly was re=oved l
from the =ain valve. Disasse=bly of the pilot valve revealed that the pilot valve stem had stuck open due to the close tolerance causing a binding con-dition between the O.D. of the stem and the I. D. of the pilot valve no::le.
Also, a 3"*M stal particle was found in the pi1~ot stem /no::le are'a.
Sub-sequent cleaning of the inlet piping to the ERV revealed this same type of metal particles.
"Ihe Crosby representative furnished a detailed draving of the pilot valve stem requiring a dic=eter of.37h This was changed to read.373 diameter
.373 *
.372 "by the Cresby rep., and the stes was modified accordingly by TEco Maintenance
--under the direction of the Crosby rep. This modification resulted in opening the clearance between the sten and the no::le thus eli=inating the binding.
'The nc::le was also re=ed out with a re=er the se-e size, no caterial was removed.
All parts were cleaned and asse bled. The solenoid linkage was adjusted to drop the adjust:isnt bolt more squarely on the disc actuator.
In addition, the adjust =ent bolt sEs positiened to cove the pilot valve stes off the seat a maxi =us of.125".
It had been moving off the seat sc=e.375".
The pilot valve vEs tdsreirvfth5dt ~ pre'ssure by actuating the solenoid three ti=es.
The valve v s testei assin twice with 5 cr 6 se::nds between tes:s.
..Ihis was followed by testing the valve five more times assuring actuation each time-b'f a cre-2.utre-de127 Tit-Jeen tests. The valve was tested with a Jressure of 1100 psig.on_the.second and third occasion.
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?...I N C fr O.S O Y V A L V E s,. , :c GAGE COMPANY i ~ -N. ri MASS O2093
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er t.2 ayu4 h,,f tJ T H A M. -- e 3 ;.-r.:.d.'3-$ N A c w. e v' 3* s IRO[k.W.a:rr. slip 16 G76 msg *) T / py,s <N u-s January 13, 1 : %.g. t.. This Babcock & Wilcox evy Power Generating Group P.O. Box 1260 Lynchburg, Virginia 24505 ~ Attention: Mr. C. D. Carmichael ~ - Senior Buyer Purchasing Department
Subject:
TOLEDO EDISON '(DAVIS BESSE NO.1) EPV-SN ASSEIBLY 10. N54890 ADJUSDIENT CF SCLENCID AD.'TUSTIlO BOLT Gentlemen: t Please forward the following information to Steve T==nna. . Para. 4.2.2.2, Crosby instruction No. I-1115 is correct as written and should be followed. ..y* r.l... 2.*. , ',. Proper adjustment of the solenoid adjusting bolt can be further checked as follows: a. Hove the solenoid plunger to full stroke by pushing to the
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3 mhvimum position. The Disc Actuator pilot Valve (19) will be depressed by the adjusting bolt (31) with the plungc in this Position. If the adjusting bolt (31) were to be, backed off a distance of approximately 5/32" (which could be accomplished by allowing the pluger to drop from its full upward position), the adjusting bolt (31) should be just beginning to make con-tact with the disc actuator pilot valve (19). Shoula the con-dition prevail, with the adjusting bolt (31) is making contact with, or is moving the disc pilot valve (19) below the free position, the adjustment is not correct and should be reset per instruction I-1115, Fara. 4.2.2.2. The above described method is not to be used for any reason other than infor 1tica, and al =cetings of the adjusting bolt (31) should be Per the instruction manual (I-1115). ~ l g
7.. _ __ G Ilil l;ll Y Y, ~ ~ a' Mr. C D. Carr.ic.:cel f / January 13, 1970 I hope the infon.stion as written is cicar and as request'ed, but if further clarification or inferr.ation is required, please do not hesitate to contact 12. R. A. Wright, Service Manager or this writer. Very truly yours, CROSB*l VALVE & GAGE CCMPANY cc: V.L. Heine
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M.A. Gaffin R.J. Ma.rtin Asst. Product Manager - Power Industry ~* B3H/1ea , f .e =, 8 9 ..,s j e-w .m..e, h 4.s 1 x 5:.; -.<
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V - - - - + - v . -+ Babcock &Wileox %,come,.uco crao P.O. Box 1260, t.ynchburg, Va. 24505 Telephone:(804) 354-5111 March 2h, 1978 SOM #352 620-001h 12B28 T3.3.1 01-020h-00 ,.= - Mr. T. D. Murray, Station Superintendent Davis-Besse Nuclear Pcver Station 5501 North State P.oute #2 Oak Harbor, Ohio h3hk9
Subject:
Adjustment of Solenoid Adjusting Bolt on Pressuriser Power Relief Valve RC2A
Reference:
Crosby Style HPV-SN Solenoid Pilot Operated Relief Valve, " Installation, Operating and Maintenance In-ctruction No. I 1115",st&T #o1-0204-00
Dear Ter:
y: The referenced instruction r.nnual pertains te the pressurizer power relief valve R02A. Sectica h of the - nal describes the testing and adjust =ent Procedure for the valve, while section 4.2 pertains to adjustments fo.- ~ Proper pilot valve actuation. A critical adjust =ent is that described in step k.2.2.2, Setting of the Adjusting Salt (P/3 31). All adjustments should be made per the instruction manual, however, proper adjustment of the solenoid adjustment bolt can be further checked as follevs : Move the solenoid plu=:er to *ull streke by pushing to the r.ar4mm position. The Disc Actuator Pilot Valve (19) vill be depressed by the adjusting bolt (31) with the plunger in this position If the adjusting bolt (31) vere to be backed off a distance of approximate-ly 5/32" (which eculd be accc=plished by allering the plunger to drop from its full upward position), the adjusting bolt (31) should be just beginning to =cke centact with the disc actuator pilot valve (19). Should the eendition pn vail, with the adjusting bolt (31) making contac: vith, or is moving the disc pilot velve (19) belev the free position, the adjustr.ent is not correct and should be re-set per instructien I-1115, Parn. h.2.2.2. Tie r:Mo-k t. W.'.c i Cem:-my I E-t efie.cs !PG7
Q) ) w Babcock &Wilcox SOM #352 l 620-0014 t March 24, 1978 Pge 2 7 Insta11stien and adjustment of the pcver relief valve was perfor=ed with i a Crosby sertice representative. The valve operated properly when tested 4-aiir. e4 c.f:er instM ' *:ica, a.d has operated properly during certain RCS transients. It is ree:::.ded that the " farther checks" cn the solenoid adjust =ent bolt stated above de included in the appropriate =aintenance procedures for the power relief valve RC2A to M"4w4:e any misadjust=ents that may be overicoked. 3 IIyou have any questions, please advise. 1 C\\ Yours truly, (: t R l Fred R. Faist - g Site Operations Mana6er FRF:nif l cc: W. E. Spangler J. A. Lauer R. L. Pitt=an R. J. Finnis D. A~ Ice J. S. Grant, TEco E. C. Novak, TEco C. R. De=eck, TECo J. G. Evans, TECo R. R. Beyer, TEco R. A. Brown, TIco J. P. Eartigan, Jr., TECo J. D. Lenardson, TECo R. E. Elen:henc, TECo
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