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Forwards Supplemental Info Re 870403 Requests for Amend to License NPF-57 & Exemption to 10CFR50,App J,Including Efforts on Leak Rate Testing W/Containment Isolation Valves in Question & Environ Valves Exposed to Prior to Testing
	ML20215L360
Person / Time
Site:	Hope Creek
Issue date:	05/08/1987
From:	Corbin McNeil; Public Service Enterprise Group
To:	; NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
	NLR-N87085, NUDOCS 8705120209
	Download: ML20215L360 (15)
	v • d • e

{{#Wiki_filter:. T Pubitc Service Electric and Gas Company Gorbin A.McNeill,Jr. Public Service Electric and Gas Company P.O. Box 236, Hancocks Bridge, NJ 08038 609339-4800 Senor vice President - Muclear yay 0 8 I!B7 N L R-N8 7085 s United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Gentlemen: SUPPLEMENTAL INFORMATION RELATED TO APRIL 3, 1987 REQUESTS FOR AMENDMENT OF FACILITY OPERATING LICENSE NPF-57 AND EXEMPTION TO 10 CPR 50, APPENDIX J HOPE CREEK GENERATING STATION DOCKET NO. 50-354 r. Attached for your review is supplemental information related to the subject submittals of April 3, 1987. Included is information with regard to the planning efforts related to the leak rate testing of the containment isolation valves in question, the environment to which the valves were exposed prior to commencement of the low power testing program, and NPRDS information indicating the operating / failure histories of the valves. We hope this information will facilitate your review efforts. - i Should<you have any questions on the attached information, please -do not hesitate to contact us. Sincerely, lLlk 4 4_ ~~ Attachment \\ C Mr. G. Rivenbark Licensing Project Manager Mr. R. W. Borchardt Senior Resident Inspector Mr. W. J. Russell, Administrator Region il Director, Bureau of Radiation Protection Department of Environmental Protection / 0 380 Scotch Road Trenton, NJ 08628 870512O209 870508 PDR ADOCK 05000354 P PDR

4 LEAK RATE TEST EXEMPTION REQUEST [ AND ASSOCIATED PLANNING EFFORTS Until late February 1987, an outage had been planned for Hope Creek for March 1987. This outage was to have included the leak rate testing of the valves in question. When plans changed, it was necessary to address the licensing efforts needed to permit an extension of the Hope Creek operating run beyond the peak l . summer period. The valves in question are intended to be leak rate tested during the planned September 1987 outage which is indicated on the attached most recent planning schedule prepared by the Hope Creek Planning Department (4/14/87). The testing exemption was requested until the first refueling outage because it was felt that the test. period could be legitimately extended i until that time due to the limited period of time that the valves have been exposed to an operating environment, The Hope Creek Planning Department addresses outage work to be i / done in terms of forced outages, planned short duration outages, and refueling outages. The forced outage plan which.is updated + i on a continuous basis is for a 3-5 day outage. If it is ,#;,} determined that a short duration will.be greater than 5 days, activities from the forthcoming short duration outage and/or the i ' forthcoming refueling outage are scheduled into the outage depending on their duration and their relationship to the other, .I more critical work that has been scheduled into the 3-5 day forced outage plan. t' / To address the upcoming. leak rate, testing. Hope Creek Planning 7 has generated a forced outage plan for a 7-day outage. The first page of the attached 7-day outage chart (and of all other outage - a plans generated by Hope Creek Planning), indicates the overall outage schedule. Always included in this overall schedule is a ~ f-period of time (8-10 hours) which'will enable plant management to determine how long the outage will be and make final decisions on the priority of work and how much of that prioritized work could be expected to be completed during the outage. In this case, since the first valve which is due for testing is included in the plan, de-inerting of the drywell for containment entry is included.- The activities in Section 8 of the chart, Site Services - ISI, indicate the efforts needed to perform the leak i rate test on valve HV-F012A (currently due 6/11/87) and other related valves. The six other valves indicated for testing are L not necessarily those due in chronologiclal order but were selected because they all require draining of the "A" RHR loop. In particular, the other valves and their current due dates are: HV-F017A-7/16/87 HV-F017A 7/16/87 i HV-F041A 7/16/87 HV-F146A 7/16/87 HV-F015A 7/25/87 i HV-F050A 7/25/87 ~. -. ~.

If the forced outage were to be longer than 7 days, additional leak rate testing would be scheduled. The next group of valves scheduled would be: HV-F027B 8/12/87 HV-F050B 6/23/87 HV-F015B 6/23/87 HV-F122B 6/23/87 Performance of the leak rate tests on these two groups of valves would encompass all tests currently due in June-July 1987. The second group of valves cannot be tested simultaneously with the first group because each group requires draining of either the "A" or the "B" RHR loop. Both RHR loops cannot be drained simultaneously for obvious reasons. It can be seen from the 7-day outage schedule that the time it takes to de-inert, perform HP surveys of the drywell, and drain the "A" RHR loop is 32-36 hours. Efforts which require this much preparatory effort are not, as a rule, scheduled into the continuously prepared 3-5 day forced outage schedule. That is indeed why the leak rate testing is not indicated in 4/24/87 outage schedule. Hope Creek management has indicated however, that performance of some of the aforementioned leak rate tests would be a priority if a forced outage of greater that 5 days is encountered. i m

( l l PSE&G HOPE CREEK GENERATING STATION PLANNING DEPT HOPE CREEK l OUTAGE PACKAGE Date 4/24/87 l 1. PLANNED SYSTEM OUTAGE SCHEDULE 2. FORCED OUTAGE SCHEDULE 3. PLA.NNED FALL OUTAGE SCHEDULE 4. REFUELING OUTAGE SCHEDULE 4 l P O

g SECTION 1 PLANNED SYSTEM OUTAGE SCHEDULE Status as of 4/24/87 l REV.13 i 1. A DIESEL {Apr 27-28) 2. LPCI D 1 [Apr 29-30) 3. LPCI C 1 (May 04-05) 4. SERVICE WTR B 1 [May 06-07? 5. RBVS C 1 (May 11-12) 6. SERVICE WTR D 1 (May 13-14) 7. SACS A 1 {May 18-19) 8. LPCI B 1 [May 20-21) 9. DG HVAC GR1 {May 26-27) l \\

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l SECTION 2 l H i i l l FORCED OUTAGE-SCHEDULE Date 4/24/87 ( l. i 4 l e \\ o.

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SECTION 3 i l l l l I DIAMM.ED FALL OUTAGE i SCHEDULE Date 4/24/87 3 -.-i = - ' - o Y e

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SITE SERVICES-ISI (DbNCAN) ' CONT.l j ( TTC P2178 6. REQ BEA 18 0 8E-ISI -R 18E V025 AND V035 LLRT HTORO , TTC-P2148 6. REO BCR 18 b8C ISI -R 18 Vil2 LLRT ORRIN R-RHR LOOP RTC P217R 6. NOME BE8 p R212A2118R ' 6. NONE 8C8 S SU8MIT & TAG TO TEST 8 VALVES IN 8 LOOP RHR RS44322P3 4. . NONE BC8 8NI E TAG 0 TEST 2 VALVES IN 8 LOOP RHR RTC-P244 4. NONE BCS Mt E TAG 18CV018 & 019 FOR TEST 8-RHR LOOP P212A2118A 20. REOS 8C8 18 ISI -R HR00 TST 18CV006 V001 V034 V031 TS44322P3 10. REQ BC 18 C-ISI -R IBC V164 AND V071 TS RIR TEST hE-TTC P217A 6. REQ SEB 18 8 1 -R IBE V026 RNO V036 LLRT HTORO TTC-P24A 6. REO BC8 IB -R IBC V018RNO v019 LLAT gC i d N'S/ PLANT INSTALLATIO,N SE.RVICES 1; 4 10 C iij 4 i i SWIIbHESREPLACEMENT 8605210478 144. GT GTIB6-226) .maar l ' ' ' l_ LI,I I l l 1 i 861110109A 120. NONE BC BC(86-237)IIIIIIIIllq l 5 ISOL ATE HPCI FROM RHR X8 8612151694 48. REQ EG -8361 RELOCATE SACS FLOW TRAN 'S TO LOOPR f,. ' ' ' LLLL1 J 8701090445 120. NONE CH CHIB6-1088A CHANGE 500MV BREAMER C 'f IIIIIIIIIIII 4 8703031829 56. NONE PB 5301 CU-22 RELAY CHANGE 0UT R&C CHANNEL ' ' LLL! ! ! ! ! L I I I M d_-12691A00 RRCS WTR PERMS SIG TO EMER RIR 8610300536 48. REQ MB C0 c5LLLL! ! ! ! ! L I I I ] ,C612100992 24. NONE SB SB (86-88 41 ADO REGULRTING TRANSFORMER IIIIIiiIIII M d.'836) RELOCATE SACS FLOW TRANSMIT *S TO LOOP 8 8612151708 48. REQ EG hBTB'd..I I I I I I I I I I I I 8703031837 48. NONE PB -5303 CU-22 RELAY CHANGE 00T'040 CHANNEL 8611181093 120. REQS BCA BC486-2371IS L T I ROM HR HT. EX A IIIllIIIIIIII 1

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0 m0 4 8 e/ 0 1 3 ari 7 4 3 0 llI 4 4 = i 8 l 2 = a l 0 1 1 l l k i 0 mM I' a l l' l 8 h P!pi l' 8! l 1 M k 8 l A l 8h!,l N l N l R l 8 P H l f l I l E l !p 0 a p ll 8!P!P!l 3 !Y a 8 P P l i = T I R g l L l F E g a I R !gl l E - !,i 8 l P l a p p l !p !p p! !p!p!p P P l p p! T a l L a e l E = !R m l G = l = l f !p !p!, = p s l !p!p p! E a F l 1 = l a l. l N a l lp! p i p!p l l. l s I h I ] [ I. [ [ { I. I )1 m lll. l E E E E E E E E E E E E E E E E E E E E = = A A A A A 8. 8 B 8 B C C C C C 0 0 B B G B G G 8 8 C G G S B 8 G B C G 8 B P P P P P N P P P P N P P P P P P N P P 1 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 t 3 P P P P P P Pt P P P P P PI P P P P P P P G G G G C G G G G G G G G G G G G G G 0 0 D 0 0 O O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E1 I 1 1 E EI 2 2 2 2 2 2 3 3 3 3 3 3 4 4 4 B E E E E E E E E E E E E E E E E E a a 8 8 8 8 8 8 8 8 a 8 8 8 8 8 8 8 8 8 8 9 n 8 8 8 8 8 a 8 8 o 8 8 8 8 8 8 8 8 8 8 6 e T 8 8 B 8 8 8 8 B B B B B B 8 8 8 8 8 8 b u E E E E E E E E E E t E E E E E E E f E t Pf f f f F f F t 5 5 4 4 4 4 4 5 t f FI fl ft F F F F F f f f f t, E0 0 0 0 0 0 t t. I. I. i. t 8 8 7 8 9 91 2 2 I. 1 1 1 1 1 D 0 0 0 5 1 0 0 0 0 14 4 3 0 0. 1 5. 0 5. 0 0 u 0 0 0 1 5 0 0 0 0 1 2 0 0 2 1 0 1 0 0 u e Y 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 ita 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 i A8 B B 8 D B 8 8 8 8 8 B 8 8 8 8 8 8 8 8 t E E E E E E E E E E E E E E E E E E f E I L F f F f F f f f F fl FL fi ? 7 7 8 8 9 4 4 r4 F F F F F F f F E 3 3 3 4 4 4 0 0 0 0 0 0 0 0 0 1 1 4 I. t t 1 1 1 1 1 2 2 l 4 4 4 5 5 5 4. 4. 4 5 5. 4. 4 4 4 4 4 f 1 1 1 0 0 1 1 1 1 0 0 1 1 4. 5 5. 5 1 1 t e 4 0 1 0 e 0 0 u. T 0. 0. 0. 0. 0. 9. 0. 01 0. 9. 9. 9. ot 0 9. 01 9 01 1 1 l N1 1 1 1 1 1 1 1 I eA 5 0 7 3 4 2 3 31 0 6 2 8 2 1 5 7 7 3 4 9 2 9 9 4 M6 01 5 7 5 7 7 t 5 2 3 5 4 61 3 3 3 3 3 0 3 3 5 3 5 3 6 2 5 61 7 6, 3 5 7 7 7 5 5 7 5 7 7 1 3 1 2 2 2 2 21 2 2 21 2 21 28 2 21 21 2 21 21 2n 1 3 3 3 3 0 1 3 2 2 2 1 8 t 1 3 3 3 3 1 0 1 4 i (e R R R R R R R R R R R R R H R H R f R H H i d

{ ~%_,,, + k- -- h. isee e 6 MAINT. RELAT DEPT (CONT.) 82 ns76 s. os.asreses i4.2srrese 40a e3 eso r 6,,,,,,,,,,,, y,,,,, y, a2n?3o io. u.esseees oo.2a cese ,400 es eco e 4,l,li,,1,1,1,,1,,1,1,1,j,j),1,11,,,,,,,,,,,,, .u n2:37s3 io. os.2aceae is.2a ceae e4oa e3 =c e 'q',1,,1,1,,1,1j,j,yI,1,1,1j,1,,,,,,,,,, 7 SI'TE SERVICES-ISIlDUNC'N) R BF36o Jo. to.lutbue 28.l?ffees c38G H QsEL 131 luhDEHWIRI ',LLRT DR1 HELL HE Ao 'I HF4s6 2. t i.2sf E e88 i3.2sFfee8 c68G A B CHEMISTRT (VANNOT) ar2,3 e. u.ourees os.osersee c7ec a Rsiasusuwicciamii 9 BRD PROTECTION (K. HRTSON) RRRoPA0oth 6. 0 7. 3a JHNee 13.3oJANe8 84AG DnAo rao suavti ontwtLL Q

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c.

z 3 w W had wM_-z.. t E A E O' O -- -. E @Z 43 A O Q -. e C C C

=

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6. - U-.=.=-e.-M-M 2

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==a.-

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== ==L C 3 =-w*-Qa-yU 3 a, t. ret.- M.m. M g -g o. N, m, gp 2 ZC-@ O 4g ggo g ga o. 3 g -. g. p W 9. p3 -i.J - v ans .. -,,a.- C. w. a. tn-- w w E I C N - u C - J c

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e mum -.m u.t du 9

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=

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Question 1 What valves, regardless of difficulty in testing or repetition of preparatory efforts required for the testing of other valves, could be leak rate tested at power? Valve HF-F027B, the Torus Spray Supply'B' RHR loop and entrance into a Tech 6" gate valve, could be tested at power. Isolation and drainage of the Spec action statement (3.5.1) would be required for testing. The Appendix J two year testing overdue date for the valve is August 12, 1987. Question 2 What kind of operating environment were the valves exposed to prior to the beginning of the low power testing program (April 1986)? For penetrations 4A, 4B, SA, SB and 6C, the inboard testable check valves (HV-F050B, HV-F050A, HV-F006B, HV0F006A and HV-F041A) and the bypass valves around them (HV-F122B, HV-F122A, HV-F039B, HV-F039A and HV-F146A) were not exposed to reactor temperature and pressure prior to April 1986. These valves are exposed to reactor temperature and pressure during normal operating conditions. Valves HV-F015B, HV-F027B, HV-F017A, HV-F015A, HV-F021A, HV-F022, HV-F023 HV-F005A and HV-F005B for the most part had been exposed to normal standby lineup conditions for the RHR system (100 psi jockey pump discharge pressure, 80-100 F) since December 1984. Valve HV-F006 was similarly exposed, prior to April 1986, to normal standby lineup conditions for the HPCI system (60 psi jockey pump discharge pressure, 100 F). Valves HV-F002, HV-F100, HV-F003, HV-F007, HV-F076 and HV-F008 were not exposed to reactor temperature and pressure prior to April 1986. Valve HV-5152B had been exposed to normal instrument air system pressure (100 psi discharge) since. January 1985. Question 3 Provide NPRDS operating experience data with regard to the valves in question? The results of the search of NPRDS data is attached. Please note the following related to this NPRDS information:

1. The NPRDS data were reviewed by Hope Creek Engineering and summarized on an attached table. This summary table includes a category referred to as " meaningful failures". These failures may be described as failures other than those due to normal valve usage, i.e. other than packing failures, bonnet leaks, worn disc, etc.

2. There were no-NPRDS reports of failures of Atwood-Morrill 12" check valves with the same model number as those installed at Hope Creek. As such the survey _ addressed all Atwood-Morrill 12" check valves.

3. Anchor-Darling valves are individually engineered and as such are not

" catalogued" by a model number.

4. Of the 54 " meaningful failures" reported for Rockwell 2" globe valves, 49 were the result of stem-disc separation due to excessive backseat force. This problem is indigenous to Rockwell globe valves manufactured prior to January 1972 as noted in NRC IE Information Notice 84-48.

Both orders for the 2" Rockwell globe valves used at Hope Creek were placed after January 1972 and as such, no valves of this type were installed at Hope Creek. Nevertheless, procedural precautions have been instituted at Hope Creek to prohibit throttling of globe valves to less than 25% open (defined by Rockwell as a " severe throttling condition") and to prevent excessive torquing. e 0 l

SUMMARY

OF NPRDS INFORMATION RELATED TO HOPE CREEK VALVES MANUFACTURER MODEL SIZE TYPE POPULATION FAILURES MEANINGFUL VALVE NO. FAILURES ATWOOD-MORRILL 13673-02-H 12" CHECK 281 12 0 HV-F050B F041A F050A F006B F006A ROCKWELL 36124MM 2" GLOBE 3014 185 54 HV-F122B F146A F122A F039B F039A 2-3624MT 2" GLOBE HV-5152B F100 F076 ANCHOR / DARLING 16" GATE 1864** 0 0 HV-F021A 14" GATE 856 24 1 HV-F006 12" GATE 0 0 HV-F017A F005B F005A 12" GLOBE 272* 0 0 HV-F015B F015A 10" GATE 75 6 HV-F003 F002 6" GATE 51 1 HV-F023 6" GLOBE 2 0 HV-F027B F022 4" GATE 89 5 HV-F007 F008 TOTAL POPULATION FOR ALL GLOBE SIZES LISTED

- TOTAL POPULATION FOR ALL 16", 12", 10", 6" AND 4" GATE VALVES

r-

SUMMARY

OF " MEANINGFUL FAILURES" IN NPRDS DATA ANCHOR / DARLING GATE VALVES SIZE PROB 1/E 4"

- incorrect r v embly - seating pre.ented by problem with guide rails - binding discs, cause unknown (2) - degraded seat and plug 6" - loose stem nut due to vibration 10" - broken stem - water in hydraulic fluid (from steam) - thermal expansion of water between discs, bowed discs (2) - temperature embrittlement of 410 SS studs - damaged internals, cause unknown 14" - valve failure due to bonnet depressurization ROCKWELL GLOBE VALVES PROBLEM - defective material and severe corrosion - faulty weld - leakage due to seat abrasions and corrosion buildup (2) - damaged seat and disc

problems other than seat-disc separation noted in IE Info. Notice 84-48

CURRENT APPENDIX J TWO-YEAR TEST DATES VALVE NO. DATE HV-F050B 8/7/87 HV-F0158 8/7/87 HV-F122B 8/7/87 HV-F027B 8/12/87 HV-F017A 8/30/87 HV-F041A 8/30/87 HV-F146A 8/30/87 HV-F015A 9/8/87 HV-F050A 9/8/87 HV-F122A 9/8/87 HV-F021A 6/11/87 HV-F005B 9/20/87 HV-F006B 9/20/87 HV-F039B 9/20/87 HV-F005A 9/19/87 HV-F006A 9/19/87 HV-F039A 9/19/87 HV-F006 8/5/87 HV-5152B 8/7/87 HV-F023 10/18/87 HV-F022 10/18/87 HV-F002 9/6/87 HV-F100 9/6/87 HV-F003 9/6/87 HV-F007 9/18/87 HV-F076 9/18/87 HV-F008 9/18/87 4 o I

l PopMho4> /664& = ANCMi/*ARLIE GATE VM FAILWi$: NFRD COTMhi (AILWE (4C) DISPLAY H!i.............. 1 CG............... A391, ANCHM / OARLIE VALVE C0 WG MODEL NUMER., 893 3 ENGG............. 6 EEGV............. IN ENGA.............. E CAUSE W FAILURE. $dEM HAD STEFFED ON M KCLUTCH LEVER $Mfi WHICH MY HAW CAUSED M VW DECLUTCH LEdA $Mfi TO E LOOSE A2 M TOPQUE $ WITCH TO E CAMGED. M DIRECT _CAUSE OF THIS !$,UNFN0Ji. R$f JUDGEST !$ THAT M (CACITION MY M4 OCCURRED TWOUGH OE OR ALL W M FOLLOWIE ; FREVIOU$ MINTEMNCE, OR TMT $0MEM MD $fEPPED ON M K CLUTCH LEVER. HIT.............. 2 W6............... A391. ANCHOR / DARLIE VW C0 WG not(L MER., 772 3 ENGG............. 10 ENGGU............. IN ENGA.............. E CAUSE W FAILWE., M ROOT CAUSE FOR THIS FAILWE WA$ TMT M VM WA$ $ FUCK IN IT$ $ EAT. HIT.............. 3 W G............... A391. ANCHOR / OARLI E V M C0 W G MODEL M KR., 833-3 ENGG............. 4 E M............. IN ENGA.............. E CAUSE OF FAIL W E.. V M 0!$C A @ $ EAT M. FIT.............. 4 PfG............... A391. ANCHOR / CARLIE VM C0 WG MODEL MER., 833-3 EEG............. 4 ENGGU............. IN EEA.............. E CAU$E OF FAILURE., TERE R NO $!GN!flCANT OCCWRENCES OR ADER$E EFFECTS TO PUBLIC MALTH OR SAFETY A$ A RESLLT OF iMIS EVENT. AN INVE$i!GAi!0N F0ut TMT DIRTY $ EATING $URFACES WERE THE ROOT CAUSE OF Th!$ FAILURE. M DIRT SUILOW WAS ATTRIBUTED TO NORML OPERAi!NG COEITIONS. MIT.............. 5 WG............... A391. ANCHOR / DARLIE VW C0 WG HWEL NUMER., 833-3 ENGG............. 4 ENGGU............. IN ENGA.............. E CAUSE OF FA!LtRE., ~ (FEINSPECTION, M ROOT CAUSE WA$ FOL2 TO M A MNLfACTURING DEFECT, Ott TO M FACT THAT M GATE TO M BODY MICH MRK$ E NOT ALIND CORRECTLY, HIT.............. 6 W G............... A391. ANCHOR / DARLING V M C0 W G M00EL M ER., 833 3 ENGG............. 4

E M............. Ik EEA.............. E CAUSE & FAILWE., M VW DISC E3 NOT MAi!E FROFIRLY. MIT.............. 7 WG............... A391. WH0fi / DARLIE VW C0 WG M0KL MG. 633-3 EE G............. 4 D G U............. IN DGA.............. E CAUSE 7 FAILW., M VW O!$C E$ NOT $EAi!E FRWGLY M TO P0fA SEATING $URFACES. HIT.............. 10 W G............... A391. M MOR / DARLING V W C0 WG M00(L MER., 963-3 D 6G............. 6 E E............. IN ENGA.............. E __3 CAUSE Of FAILW., M STDI NUT HAD VIBRATED LODE W FELL TO M 80TTOM Y M CAE M TO CYCL!C tai!M, M NUT MCM DIANGLED IN M E AR$ H N M HANDWHEEL E $ OPERATED. a HIT.............. 11 W G............... A391. M HOR / DARLING V W C0 WG MODEL MS., W121376 ENGG............. 6 E M............. IN EEA.............. E CAUSE OF FAILWE., M DISC E$ NOT $ EATING PROPULY. Hlf.............. 12 W G............... A391. M HOR / DARLI E V W C0 WG MODEL p0ER.. W121376 ENGG............. 6 E E............. IN DGA.............. E ~ CAUK Of FAIL W.. TW VW ES M, PliTED OR $iEAM CUfiO'INiP0 INT WRE M VW COULD NOT M REPAIRED. HII.............. 13 W G............... A391. ANCHOR / DARLING V W C0 W G MODEL p a s. 928 3 ENGG.............. 10 D66U............. IN ENGA.............. E CAUSE OF FAILURE., $ TEM ET ON MD 13 E$ 8ACKED OFF W M 80$HING E$ LOOK. HIT.............. 1$ W 6............... A391. ANCHOR / OARLING V W C0 WG MODEL WMER., DWG-NO-2307-3-7 DG6.............. ENGGU............. INCH ENGA.............. E CAU K OF FAILURE.. PACKING E $ AGE W. MIT.............. 16

W6............... ADI, AO(A / W.1% MLVE C0 W6 MDCC. W.. %-ND 2807 3-7 E%G.............. & E M............. INCH EEA.............. E C W Of FAILURE.. CAUSE & TA! LURE LM N. HIT.............. 17 46............... A391, ANOW / CAR l.1% VALVE C0

61X(L IutKR. 0WG-NO 1260-3 ENG6.............

10 E M............. INCH [EA.............. E C W Of fA! LURE., DUE TO NORM L EAR. MIT.............. 18 N 6............... A391, ANCHOR / DARLING V W C0

6 M00EL MNG., 0W6-NO-1218-3 ENGG.............

10 ENG60............. INCH DGA.............. E CAU$E Of TAILtflE. VM 2-E21-f0058 la$ LDK!NG PAST !!'$ SEAT ECW Of $mLL NICK $ IN TE DISK, RESLLf!NG fil0M NORML EAR. HIT.............. 19 W 6............... A391. ANCHOR / C.*RLING V W C0 5 6 MODEL le N G., DW6-NO 1222-3 ENG6............. 10 EN66U............. INCH DGA.............. E CAUSE of fA!Lutt.. E_EM b43_(0V..ND BR0km. HIT.............. 20 W 6............... A391, ANCHOR / DARLING V W C0 W6 MODEL M#9ER., DW6-NO-8W10-87116 ENGG........... 10 D660............. INCH DGA.............. E CE 7RLING VW C0 W 6 MODEL lu e s. 0WG-N0 4 10-87116 D66............. 1118 ENG6U............. P116 DGA.............. E CW Of FAlltitt.. VW NEED$ REFACx!NG AE RE5DLING. HIT.............. 30

6...............

A391. ANCHOR / OARLING V W C0 WG MODEL NUMOG., 0W6-40@l0-87118 DG6............. 10 fNGGV............. IN DGA.............. E CAU$E Of fA!LiflE.. INSPECTION FOU$ FORT!GN mTERIAL BETEEN VW $ EAT AND 0!$C, H!i.............. 31

i 46............... Mil. WW / CARLIE VW C0 4 6 MODE. NitBER., ( $ -h0-!.10-87111 EEG............. 10 E E............. IN EEA.............. E CW 0F (AILWE.. CAU$E W LEAKAGE m VW 2-E41 f001 E$ M TO WCAN FACA!E. HIT.............. 32 WG............... A311, ANCHM / OARLING VM C0 W G W L Ntr$ U., DWG NO 1227 3 EN6G............. 4 ENGGU............. [NCH EEA.............. E C W OF FAILURE. 8AD PACKING A E BODY GASKET HIT.............. 33 W G............... A391. ANCHOR / CARLIE V G C0 W G M00EL NUPSER. 2 4 313 ENGG............. 6 ENIGU............. IN EEA.............. E CAUSE & FA! LIRE.. M VW O!$C HAD A COUPLE 7 BAD PLACE $. $USPECT NMMAL EAR, HIT.............. 34 WG............... A391. ANCHOR / DARLING VW C0 W G MOM L IU SER., BW6 4 313 EN6G............. 6 ENGGU............. IN ENGA.............. E CW 0F FAILLAE.. RWCU VM 2-631 F004 LEMED FROM 800Y TO 80Mi A$ A RESULT OF DIRT MLD UP ON SEAL SiMACE, HIT.............. 3$ WG............... A391. ANCHOR / OARLING VW C0 W G MODEL NtreER. 8W6 4 313 ENGG............. 6 ENIGU............. IN ENEA.............. E CW 0F FAILURE.. !$0LAi!0N TRIP $!GhAL OCCURED KCW RWCU !$0LAi!0N CIRCUITRY FU$E fil 6LEW. M IM$i!GAi!0N OF THIS EVENT WAS UhA8LE TO MTERMM M REASON WY fi6 SLEW. NO CROUND$ W DETECTED AE NO WORK ES IN PROGRES$ WICH COLLD E A$$0CIATED WITH M FU$E !$0LAi!0N CIRCU!TRY. HIT.............. 36 W G............... A391. ANCHOR / DARLING V W C0 W G MODEL In 9ER., BW6 4 313 [N66............. 6 EN660............. IN ENIA.............. E CW 0F FAILLAE., CW 0F TROL 6LE WITH REACTOR WTD CLEMLP !NLET INBOARD !$0LAi!0N VdVE 2-G31 f004 E$ NOT WAi!MD ON WORK REQUEST. H!i.............. 37 WG............... A391. ANCHOR / DARLING VW C0 W G MODEL lu gER., 8W6 4 313 [N66............. 6

EEGU............. IN EN6A.............. E CAU$E Of fA!LI.EE., M C W u $ hCT $ FATED DIRECTLY ON M TROUPit f!CKET. HIT.............. 34 WG............... A391. AKHOR / DARLIE VW C0 WG M00CL W6ER. 0WG-NO-2307-3-7 ENIG............. 4 EN66U............. INCH EEA.............. E CAUE W fA!LlRE. CAU$E Of LEAK OLE TO WAR ON VW PACKING. HIT.............. 31 46............... A391. AKHOR / OARLING VW C0 NG MODEL MJMBER., M42327 EN66............. 4 EN66U............. IN EEA.............. E CAU$( Of FAILW.. MINTENANCE F0t#0 A PREsstAE 0!ffERENTIAL IE!CAi!NG $ WITCH (Ell-P0!$-N021A) TO HAVE BAO MTER MOVEENT. RELAY K8&A WAS F0tt0 BAD ALSO. HIT.............. 60 M 4............... A391, ANCHOR / OARLING V W C0 WG MODEL WGER., BW642327 EN64............. 4 ENIGU............. IN ENGA.............. E CAUW W FA!LtAE.. $ EAT DEFACED, FALLTY GASKET $, MIS $!NG RING $. H!i.............. 41 WG............... A391, ANCHOR / OARLING VW C0 WG MODEL W50t.. M-82327 EEG............. 4 EN66U............. IN EN6A.............. E CAV E Of fA!LlRE., M V W $iEM A$$0 9LY WAS NOT PROPERLY Lt8RICATED. MIT.............. 42 W G............... A391, ANCHOR / DARLING V W C0 W0 MODEL NGER., BW642327 EM66............. 4 EN6GV............. IN ENGA.............. E CAUSE Of FA!LtM.. M O!$C A2 MAI W F0l20 WORN. H!I.............. 43 W G............... A391, ANCHOR / OARLING V W C0 WG MODEL WSER. 8W642327 ENIG.............. EN66U............. IN EN64.............. E CAUK Of fAILLAE., 0!$ASEMBLED AE FOU@ VW 0!$C 70 HAVE $LIGhi 0AMAGE. $U$PECTED CAW. DAMAGED 0!$C CAU$ED BY TRASH. H!i.............. 44

W6............... A311. AKW / CARLIM W.VE C0 W G E M BER., $0-1261 3 EMG............. 4 [ EGO............. I n EEA.............. E CW W FAILtRE., VW fACTED IMICTLY, PACKIM RING $ ERE FOLN) TO E THE M LENGTH HIT.............. 45 W 6............... A391. A G OR / DARLI E VALVE C0 46 MODEL HER.. E-64314 EM G............. 6 EEGU............. IN EEA.............. E CAUSE OF FAILURE.. THE APPARENT CAUSE !$ THAT Td WJNG FACKIE WA$ USED IN VALVE E11 F0525. MIT.............. 46 W G............... A391. ANCHOR / DARLING V W C0 WG M0C(L MJMER. E42322 EE G............. 4 EN6GU............. INCH EK A.............. E CAU$E OF FAILlRE. FAILtRE R$ CAU$ED BY NORMAL EAR OF PACKING. Hlf.............. 47 W G............... A391. ANCHOR / DARLING V W C0 WG M00EL NGER., E42322 E E G.............. EN66U............. INCH EMA.............. E CAUSE OF FAlllRE., EAR HIT.............. 48 N G............... A391. ANCHOR / DARLING V W C0 WG MODEL IUSER. E42322 EN6G............. 4 EN66U............. INCH ENGA.............. E CAUSE OF FAlLlRE., FAILtRE E$ CAUSED BY NORMAL E AR OF V W PACKING. HII.............. 4 9 W G............... A391. ANCHOR / DARLING V W C0 46 MODEL M8ER.. E42322 EN66.............. EN6GU............. INCH ENGA.............. E CAUSE OF fA!LtRE. GLAND EED$ REPACKING. PACKING FOLL0ER HA5 NO FlRIER ADJU$ TENT. Hli.'............. 50 W G............... A391. ANC W / DARLING V W C0 NG MODEL IUGER. E42322 ENe6............. 4 EN66U............. !NCH ENGA.............. E_ CAUSE OF fAILtRE.. Ol$K W 5 812 1NG ON TT GUID( RAIL $ CAU$I E V W NOT TO $ EAT PROPERLY - ~.___.._. -

HII.............. 51 WG............... A391. ANCHGi / C# LING VW C0 WG Nt(L EMER., 0W-%-1M-3 DGG............. 10 E G U............. INCH DGA.............. E CAUSE OF FAILtRE.. GLAW WIS LOOSE. HIT............... $2 W6............... A391, AGOR / DARLIE VW C0 WG MODEL NtNID. 0WG-NO-1218-3 D64............. 10 DGGU............. le ENGA.............. E CAUSE OF FAlllRE., GLAM) Wi$ WAT LOOSE. HIT.............. 53 W G............... A391. ANCHOR / DARLING V M C0 WG MODEL MER. 0WG-NO-1222-3 D66............. 10 DGGU............. INCH ENGA.............. E CAUSE OF fAILIRE., ACTUATOR ARMS FOR POSITION SWITCES R ENT. ~ HIT............... M WG............... A391, ANCHOR / DARLING VM C0 W G MODEL M ER. DWG-NO-1222-3 D66............. 10 9 64U............. I n DGA.............. E CAUSE & FAILURE., ACTUATOR ARMS FOR P05! TION SWITCES E ENT. HIT.............. 55 W G............... A391. AE HOR / DARLING V M C0 W G MODEL M BER., DWG-NO-8W1 H 7118 DGG............. 10 DGGU............. le EEA.............. E CAUSE W fAILtRE.. WATER IN HYDRALA.IC FLUID CAU$ED CORRO$10N BUILDUP ON EGR ACTUATOR, $ TEAM LEMING PAST EAT & VW ALLOC Lwtig.T0_ENiaHvoRAutrCrLUIo. HIT............... % WG............... A391, ANCHOR / DARLING VM C0 WG MODEL NLNG., 0WG-NO-8W10-87118 ENGG............. 10 ENGGU............. INCH U Gk.............. E CAUE W Fall'JIE.. Umm. A CRACK WAS f0tN) IN IT VW 0!$C lefN A G DISC WAS INSTALLED IT WA$ NOT MACHIG PROFERLY A2 HAD TO E K $URFACED. Hli.............. 57 WG............... A391, ANCHOR / OARLING VW C0 W G MODEL M 8 0. 0WG-W -8W10-87118

ENGG.............. 10 ENGGU............. INCH E EA.............. E CAUSE W FAILtRE., CAUSE W FAILtFE WA$ DETEfd!ED TO BE FROM NORW M AND AGIE Of M PACKING, WICH IS EXPCSED 10 HIGH PRESSURE A E TEMFERATURE, HIT.............. 54 56............... A391. ANCHOR / DARLIE VM C0 W6 MODEL MER., DE-NO-BW10-87118 EEG.............. 10 EEGU............. INCH EEA.............. E CAUSE Of FAILURE.. FAILtRE WAS CAUSED BY NORMAL M Of VM OISC. HIT.............. 59 W 6............... A391, ANCHOR / DARLIN6 V M C0 WG MODEL MER. 0W6-NO-5W10-87116 ENGG.............. 10 ENGGU............. INCH ENGA.............. E CAUSE Of FAILURE., WDRN VALVE GATE HIT.............. 60 N 6............... A391, ANCHOR / DARLING V M C0 WG MODEL MER. 0WG-NO-8W10-87116 ENG6............. 10 ENGGU............. INCH ENGA.............. E CAUSE Of fAILtRE. M CAUSE Of M PACKING LEAK !$ BEING ATTRIBUTTED TO M AGING Of M PACKIN6. HIT.............. 61 W 6............... A391, ANCHOR / DARLING V M C0 WG MODEL MER. 0W6-NCHlW10-87116 ENG6............. 10 ENGGU............. INCH ENGA.............. E CAUSE Of FAlLlRE.. FAILURE WA$ CAUSED 8Y NORMAL WEAR Of VM PACKING. HIT.............. 65 WG............... A391, ANCHOR / DARLING VM C0 NG MODEL MER., BW4-82327 ENG6............. 4 ENGGV............. IN ENGA.............. E CAUSE Of FAILtRE.. F0t#0 VM $ TEM PACKING TO BE DETERIORATED Ott TO M. HIT.*............. 66 W 6............... A391, ANCHOR / DARLING V M C0 WG MODEL MER. 8W4-82327 ENG6............. 4 ENGGU............. IN ENGA.............. E CAUSE Of FAILURE., VM 2-E11-f006A WA$ LEAKING OUE TO DIRTY AND CCEROC(D INTERMLS CAUSED BY NORMAL USE.

HIT.............. 67 W6............... A391. ANCHOR / WLIE VM C0 W6 MODEL WEER... M42327 ENG6............. 4 EEGU............. IN ENGA..............-E CM OF FAILURE.. FACKIE FAILED. HIT.............. 68 W6............... A391, ANCHOR / DARLIE VALVE C0 W6 MODEL NUSER., M42327 EEG............. 4 ENGGU............. IN EEA.............. E CAUSE OF FAIllRE., EDGE DID NOT APPREAR TO E MMING FULL CONTACT WITH SEAT ON VALVE 2-E11-F0268. HIT.............. 69 W 6............... A391. ANCHOR / DARLING V M C0 WG MODEL IUSER., M42327 ENG6.............. ENGGU............. IN ENGA.............. E CM OF FAlllRE., UENOW HIT.............. 70 W G............... A591, A D OR / DARLING V W C0 W6 MODEL WSER.. M42322 EN6G............. 4 ENGGU............. INCH ENGA.............. E CAUSE OF FALL lRE.. PACKING KTERIORATED. ' HIT.............. 71 W 6............... A391. ANCHOR / OARLING V M C0 W6 MODEL NUSER.. M42322 ENGG............. 4 ENGGU............. INCH ENGA.............. E CAUSE OF FAILtRE., SUSPECT VALVE INTERNALS TO M DIRTY. HIT.............. 72 W 6............... A391. ANCHOR / DARLING V W C0 W6 MODEL NUMER. 33765 EN66.............. ENGGU............. IN ENGA.............. E CAUSE OF FAILURE.. PACKING WORN FROM USE.. ~ HIT.............. 73 N G............... A391, ANCHOR / DARLING V M C0 W 6 M00EL IM EER., 33765 ENG6............. 4 EN6GU............. IN

1 l EEA.............. E CAUSE OF FARURE.. - PACKING WDRN FROM USE, HIT.............. 76 E 6............... A391, ANCHOR / DARLING VEVE C0 W6 PODEL IUEER.. ES141 ENGG............. 4 ' ENGGU............. IN ENGA.............. E CAUSE OF FAILURE.. VALVE INTERNALS WDRN FROM USE. MIT.............. 75 W 6............... A391, ANCHOR / DARLING VALVE C0 W 6 MODEL IM EEP. 10X8X10 NO. 5350 E 0 ENGG............. 10 - ENG60............. IN ENGA.............. E CAUSE OF FAIL lRE., M CAUSE OF M FARURE WAS DUE TO M FECHANICAL OVERLOAD SWITCH FOR M VALVE OPERATOR BEING SET AT M MINI!Ut SETTIE. HIT.............. 76 E 6............... A391, ANCHOR / OARLING VALVE C0 WG MODEL IUSER. 0WS W852219 REV A ENGG............. 10 - ENGGU............. IN ENGA.............. E CAUSE OF FAILURE. CAUSE OF FAILURE WAS twJI0I41. M VALVE WAS C0&LETELY REFACKED LESS THAN 3 MONTHS EARLIER, BUT CONTIltlED TO LDK M PACKING WAS TIGHTEIED TWICE SINCE M LAST REPAIR, HIT.............. 77

y W 6...............

A391. ANCHOR / DARLING VALVE C0 E6 MODEL lutER. 598-5-1 ENGG............. 4 ENGGU............. IN ENGA.............. E CAUSE OF FAILURE., FAILED TEST DUE TO DCESSM PACKING 6 LAW LEAKAGE. TORQUE SWITCH SETTING OF VEVE OPERATOR WAS POSSIBLE CONTRIBUTINGFACTOR. HIT.............. 78 WG............... A391, ANCHOR / DARLING V EVE C0 WG MODEL lutER., 598-5-1 ENGG.............. ENGGU............. IN ENGA............. E CAUSE OF FAILtRE., FAILED TEST DtE TO DCESSIVE PACKING 6 LAND LDKAGE. HIT.............. 79 W6'............... A391. ANCHOR / DARLING VALVE C0 W G MODEL IU SER. 598-5-1 ENGG............. 4 - E1660............. IN 05A.............. E CAUSE OF FAIL lRE., NO CAUSE DETERMIIED. r -4_ ,,m

HII.............. 80 W 6............... A391, AhCHOR / DAFLI% V W C0 E 6 MODEL M ER.. 1367-5-1 EEG............ 10 DG60............. IN EEA.............. E CAUSE OF FAIL lRE., FOREIGN MIERIAL ( WELD R00 AND St>G ) F0t@ INSIDE VALVE. THE FOREIGN MTERIAL SCRATCED fiATIW SERVICES. HIT.............. 81 N6............... A591, ANCHCR / DARLING VALVE C0 W 6 MODEL IU SER.. (IN GATE ENGG............. 4.0 ENGGU............. IN DGA.............. E CAUSE OF FAIL lRE.. tRNOW. HIT.............. 82 W6............... A391, ANCHOR / DARLING VM C0 E 6 MODEL M ER. LIN GATE ENGG............. 4.0 ENGGU............. IN ENGA.............. E CAUSE OF FAIL lRE., PACKING WAS TOO TIGHT. HIT.............. 83 E 6............... A391, ANCHOR / DARLING V W C0 W 6 MODEL M ER., AVC DWG 94-12970 ENGG............. 4 ENGGU............. IN D6A.............. E CAUSE OF FARURE.. CAUSES LMNOW. HIT.............. 84 W G............... A391, ANCHOR / OARLING V W C0 NG MODEL JUSER.. AVC DW61477-3 D 66............. 6 ENGGU............. IN DGA.............. E CAUSE OF FAIllRE., LIMIT SWITCH IS OUT OF ADJUSTENT DLE TO EAR. HIT.............. 85 W 6............... A391, ANCHOR / DARLING V M C0 W 6 MODEL N M ER.. AVC DWG 1493-3 D66............. 4 ENGGU............. IN DGA.............. E CAUSE OF FARLRE., CONTACT MER 4 Will NOT POTATE CAUSING MOTOR TO CONTINUE RLMING VM INTO OFEN SEAT, EIACT CAUSE (RNOW. f HII.............. 86 l W 6............... A391, ANCHOR / DARLING V M C0 W6 MODEL MG.. AVC OWG 1530-3 i D66............. 4 i EN660............. IN I DGA.............. E l l l i I r ._,,m _,.y--,.__-.7,_

CM OF FAILVE!.. CAUSE LWGA. Hli.............. 87 W G............... A391. AhCHOR / DARLI E V M C0 W G MODEL N M ER.. AVC OWG 2021-3 EEG............. 6 ENGGU............. IN EEA.............. E CAUSE Of FAILtRE., WEAR FT(A NCRR USE. HIT.............. 88 W6............... A391. AKHOR / DMLING VALVE C0 W G MODEL N M ER. AVC DWG 2021-3 ENGG............. 6 ENGGU............. IN ENGA.............. E CW Of FAILtRE.. VM KEDS LUBRICATION FROM NORK USE. HIT.............. 91 W G............... A391. ANCHOR / OARLING V M C0 WG MODEL NMER., ANCHOR 1%3 REV F ENGG............. 10 ENGGU............. IN ENGA.............. E CAUSE Of FAILtRE., M SEAT RING A2 DISC R BAD DLE TO EAR. HIT.............. 92 W G............... A391. ANCHOR / OARLING V M C0 WG MODEL NUMBER., ANCHOR IW3 REV F DEG............. 10 ENGGU............. IN ENGA.............. E C M OF FAILURE., NOR K EAR. MIT.............. 93 WG............... A391, ANCHOR / OARLING VM C0 W G MODEL N M ER. 10 IN 600L5 GATE VLV l ENGG............. 10 ENGGU............. IN EEA.............. E CAUSE Of FAlltRE., OUE,?0 LEMAGE FAST D2 VM M VM WAS CLOSED MANUALLY. THIS CAUSED M VM TO BIS IN ITS SEAT CAUSING EICES$1VE CURRENT DEMAND ON M V M OPERATOR. l i HIT.............. 94 W6............... A591, ANCHOR / OMLING VM C0 W G MODEL N M ER. 2091 5 ENGG............. 6 ENEGU............. IN l ENGA.............. E l CAUSE Of FAIL lRE., CAUSE UM00m 1 l HIT.............. 95 l W G............... A391. ANCHOR / OARLING V M C0 i l

MG M000. MER. 2091-5 EEG............. 6 DGGU............. IN ENGA.............. E CAUSE OF FAILtRE., CAUSE IS ATRIBUTED TO TE STEM BINDING ON M FA71E LANTERN RING. HIT............... % W6............... A311, ANCHOR / OARLING VALVE C0 N G MODEL NUMBER., 61N-GATE-600L5 D66............. 6 ENGGU............. IN ENGA.............. E CAUSE & FAILURE.. CAUSE !$ ATTRIBUITED TO DPECTED EAR / AGE OF TE PACXIE. TE FACKING GLAE la$ F0VE 80TT0ED OUT FROM PREVIOUS ADJMTENTS. HIT.............. 100 W G............... A391, ANCHOR / DARLING V M C0 NG N00EL MEER.. DWG NO 93-16401 ENGG............. 4 ENGGU............. IN ENGA.............. E CAUSE OF FAILlRE., TE VM SEAT DHIBITED MINOR IRREGlLARITIES. HIT.............. 101 WG............... A391, ANCHOR / DARLIE VM C0 WG N00EL fueER. 0WG NO M-137% ENGG............. 10 EEGU............. IN DGA.............. E CAU$E OF FAlllRE. STEAM CUTS ON VM SEAT AND DISC CAUSED DCES$1VE LEAKAGE, HIT.............. 102 WG............... A391, ANCHOR / DARLING VM C0 WG MODEL IMEER. 0W6 NO W 137% ENGG............. 10 ENGGU............. IN ENGA.............. E CAUSE OF FAIllRE.. VM SEAT AE 015C K $ LIGHTLY DAMAGED. MIT.............. 103 W 6............... A391, ANCHOR / DARLING V M C0 NG MODEL NUMBER.. DWG NO %-137% ENGG............. 10 ENGGU............. IN ENGA.............. E CAUSE OF FAILlRE.. TE VM SEAT DHIBITED MINOR IRREGULARIi!E$. HII.............. 106 WG............... A391, ANCHOR / OARLIE VM C0 W G M CEL IU SER., DWG NO W 13772 ENGG............. 4 ENEGU............. IN EEA.............. E

CAUSE OF FAILtRE., VM SEAT A@ GATE E GOUGED. MIT.............. 105 WG............... ~ A391. ANCHOR / OMLING VM C0 NG MODEL MBER., DE ND 93-1408 ENGG............. 4 ENGGU............. IN ENGA.............. E CAUSE OF FAlllRE., VM SEAT 5 SHED SLIGHT PITTING; POSSIRY A RESULT OF COCENSAi!ON OIIDATION IN TE LIE, HIT.............. 106 WG............... A391, ANCHOR / DARLIE VM C0 WG M00EL MER., DE NO 93-1409 ENGG............. 6 ENGGU............. IN ENGA.............. E CAUSE OF FAILLRE., VM SEAT $ SHMD SLIRif PIIIING ; POSSIRY A RESULT OF COGENSATION CXICATION IN TE LM. HIT.............. 107 W S............... A391, ANCHOR / DARLING V M CO WG MODEL MER. OE NO 93-1409 ENGG............. 6 ENGGU............. IN ENGA.............. E CAU$E OF FAILlRE., VM SEATS $H0ED RIGHT PITTING POS$11Y A RESLLI 0F C0206Ai!0N OIIDATION IN TE LM. HIT.............. 105 WG............... A39'., ANC1:0R / DARLING V M C0 NG MODEL MER. OE NO 93-1409 ENGG............. 6 ENGGV............. IN ENGA.............. E CAUSE OF FAlllRE.. VM SEAf$ M NOT MAKING 6000 CONTACT. HIT.............. 109 NG............... A391, ANCHOR / OMLING VM C0 l WG MODEL MER.. OE NO 93-1413 ENGG............. 10 l ENGGU............. IN ENGA.............. E CAUSE OF FAILURE.. PACKING LEAK. 1 HIT.............. 110 l 46............... A391, ANCHOR / OARLING VM C0 WG M00EL MER., DWG NO 93-1413 ENGG............. 10 l ENGGU............. IN l ENGA.............. E CAUSE OF FAILlRE. WEAR ON Y M DISK. HIT.............. 113 W G............... A391, ANCHOR / DARLING V M C0 N G MOCEL lA#EER., D E NO 9413753 ENGG............. 6 i l

ENGGU............. IN ENGA.............. E CAUSE OF FAILURE., PACKING AGIW W WEAR, HIT.............. 114 M G............... A391, ANCHOR / DARLING V W C0 W G MODEL M CR. 0WG NO 93-!&446 ENIG............. 6 ENGGU............. IN ENGA.............. E CAUSE OF FAILURE.. VALVE PACKING WAS BIMING W CAU$ING VW TO E VERY HARD 10 CLOSE. HIT.............. 115 M 6............... A391. ANCHOR / DARLING V W C0 N G MODEL N M ER., DWG N0 93-14410 ENGG............. 6 ENGGU............. IN ENG4.............. E _ CAUSE OF FAILE.{00TH CHIP COULD ECOE LODGED IN TEETH OF GEAR $ PREVENT HIT.............. 116 W 6............... A391. ANCHOR / DARLING V W C0 W G MODEL M ER.. DWG NO W9820099 ENIG............. 6 ENIGU............. IN ENGA.............. E CAUSE Of FAIL E., SEATS E RE WORN. HIT.............. 117 WG............... A391. ANCHOR / DARLING VW C0 WG MOEL MER., DWG ND 93-!&&O9 ENGG............. 6 ENGGU............. IN ENGA.............. E CAUSE OF FAILURE., TE V W D!$C W SEATS E CUT. HIT.............. 118 M 6............... A391. ANCHOR / OARLING V W C0 W G MODEL M ER. DWG NO 93-1&&O9 ENGG............. 6 ENGGU............. IN ENGA.............. E CAUSE OF FAILWiE., TE VW DISC W $ EATS E CUT. HIT.............. 119 M G............... A391, ANCHOR / DARLING V W C0 WG MODEL mat. 0WG NO 93-!(413 0E6............. 10 056U............. IN 0 54.............. E CAUSE OF FAILURE., EAR ON VW $ TATS. HIT.............. 120 M 6............... A391, ANCHOR / DARLING V W C0

W6 MDCG NJ1ER. 0WG NO 93-14413 EM6............. 10 EE GU............. IN EEA.............. E CAUSE OF FAILtRE., EAR ON VALVE SEAT $. HIT.............. 121 W 6............... A391. ANCHOR / DARLING V M C0 W6 MDC(L NUMER.. DWG NO 94-13753 ENG6............. 6 ENGGU............. IN ENGA.............. E CAUSE OF FAILURE.. DAMGE 10 M VM DISC A2 $ EAT $lRFACE. IEAROUT. HIT.............. 122 N G............... A391. ANCHOR / OARLING V M C0 W G MODEL M ER.. 93-15661-4'-900 ENG6............. 4 ENG60............. IN ENGA.............. E CAUSE OF FAILURE. M CAUSE OF M DRYWELL TENUATURE INCREASE ES !$0 LATED TO A REACTOR CORE ISOLAi!0N COOLING ( RCIC ) IE0ARD !$0LAT!0N VM ( HV-1W007 ) HRE ORMLL LEAKAGE OCCURED TWOUGH M VM AT APPR011MTELY 4.5 GPM. UPON IM5f16Ai!0N, IT E$ DISCOVERED IMI M PACKING MD DETERIORATED DLE TO WEAROUT. HIT.............. 123 M 6............... A391. ANCHOR / DARLING V M C0 W 6 MODEL M ER., 93-13661-4'-900 ENG6............. 4 ENG60............. IN ENGA.............. E CAUE OF FAILtRE.. M VW PACK!W LEAK HAD KEN 10CNTIFIED ORIGINALLY DURING M 22 REFUELING OUTAGE APRIL 23.1966 ( E$ SCEDULED TO E FIXED OURIW M EIT REFUELING OUTAGE IN 1987 ) 8UT CONTAINNT TENERATURES $UD004.Y KCAME HIGH ON 861226. IT ES DI$ COVERED TMT A 3/8 INCH HDLE E$ BLOWN OUT M TOP OF M PACKIE BY M VM SHAFT HIT.............. 124 E6............... A391. ANCHOR / OARLING VALVE C0 4 6 MODEL M ER.. 93-13715-10*-150 ENG6............. 10 ENG60............. IN ENGA.............. E CAUSE OF FAILURE., WITH M ELP OF AN ANCHOR DARLING VD00R IT E$ FOU2 TMT M DISC SEAT HAD EVERAL $CRATCES lHICH ERE ELEIVED 10 MVE MEN CAUSED BY NORML / A8 NORMAL WEAR AND ULTIMTELY CAUSE M VM TO FAIL SE 159-087. HIT.............. 12$ W 6............... A391. ANCHfR / DARLING V M C0 NGMODELNUMBER.. 9313701-4'300 ENG6'............. 4 [NGGU............. IN ENGA.............. E CAVE OF FAILURE.. AFTER INVESTIGAi!0N IT E$ DETDMINED M CAUSE OF THI$ MNT E$ OLE TO ABNORML WEAR OF M VM DISC $EATIE SURFACE. ROOT CAUSE lnN0WN AT THIS TIME. HIT.............. 126

WG............... A391. AhCKA / CARLING VW C0 WG M00EL WMER., 93-13701-4*-300 ENGG.............. ENGGU............. IN ENGA.............. E CAUSE OF FAlllRE., LFON IMSI!GATION IT ES OBSERVED TMT M FCING GLMD ES LOOSE AND VI5 RATING THIS E$ DUE TO NOMAL / ABNORML EAR, HIT.............. 127 NG............... A391. ANCHOR / DMLING VM C0 W G MOD E N M ER. 6'-600 ENGG............. 6 ENGGU............. IN ENGA.............. E CAUSE OF FAILtRE. M $USPECTED CAUSE 7 M LEMAGE INCREASE E$ M OCCtRRENCE OF T)REE SEFARATE REACTOR PROTECTION $YSTEM ( RP$)ELECTRICALPROTECTIONASSEMBLY(EPA)BAEAKERTRIPSON8/16/86,ALLRESULTINGININBOARDEOUTBOARD FRIMRf CONTAIMEhi !$0LAi!0N$ $UBSEQLENTLY, ORMLL UNIDENTIf!ED LEMEE CufENCED TO INCREASE DE TO CYCLING OF M VW$ AS M KVELOPTNT OF A VM FACKING LEM($). HIT.............. 128 N G............... A391. ANCHOR / DARLING V W C0 N G M00 a M U. 93-13801 10*-600 ENGG............. 10 ENGW............. IN ENGA.............. E CE 7 FAlLlRE.. NN M COVER MD LMfDN RING HAD BEEN REMOVED FROM M VM, IT E$ FOUW TMT M PACK!mG HAD DETSIORATED DUE TO NORML/A8NORML EAR Titl$ ALLMNG R& EASED LEMAGE TO OCC1R. HIT.............. 129 NG............... A391. MCHOR / DARLING VM C0 W G M00R N M ER. 93-13802 10*-600 ENGG............. 10 ENGGU............. IN ENGA.............. E CAUSE OF FAILLRE., LPON INVE$f!AGION, !! E$ F0t80 TMi M VW PACKING E5 HARD A2 BRITTLE. TMT M VM STEM DHIBITED EM0$10N A@ GALLING OF M $ TEM M ROOT CAUSE OF THIS FAILURE !$ NORML / ABN0RML EAR. Hlf.............. 130 WG............... A391. MCHOR / DARLING VM C0 NG M0OR MER. 93-1380210*-600 ENGG............. 10 ENGGU............. IN ENGA.............. E CAUSE OF FAILtRE.. AFTER IM$i!GAi!0N IT E$ DETERMMD TMi M VW DISC W$ RIDING ON M VW BODY INSTDD 7 M WIDE RIB . ROOT CW !$ UMNOW AT THIS IIM. Hli.............. 131 MG............... A391. ANCHOR / DMLING VW C0 N G MORL M ER.. 93-1380210'600 ENGG............. 10 [NGGU............. IN ENGA.............. E CAUSE OF FAILtRE.. BURNING 04 0F M EN MIW ON M VW. M CAUSE OF THIS VW FACKIW LDK !$ BRIEVED TO K OE TO NORML DFECTED EM. IN FACT If E$ FET M LEM us REAi!VELY MINOR. EVER M LES$ $TANDARD SAFETY

PRECAUSIONS MD ED TEEN. FORTUhATELY NO PEWENT INAlilES E $UsiA'NED BY TE WORKERS IWJLVED. HIT.............. 132 M G............... A391. ANCHOR / CARLING V W C0 WG MODEL IRJMER.. 2171-71 D66............. 6 ENGGU............. IN DGA.............. E CAUK OF FAILt3E., M DCES$M LIMAGE RATE OF M PRIMRY CONTAIMOT 80uoARY hAS KEN ATTRIBUTED TO NORML M. HIT.............. 133 W G............... A391, ANCHOR / DARLING V E C0 NGMODELIUSER., 2171-71 D 66............. 6 ENGGU............. IN ENEA.............. E CAUK OF FAILLAE., M DCES$M LEMAGE RATE OF M PRIMRY CONTAINMDT 80tf0ARY HAS ED ATTRIBUTED TO NCRML M. HIT.............. 1M M G............... A391, ANCHAR / DARLING V M C0 WG MODEL IUSG. 4721 ENGG............. 10 DEGU............. IN D64.............. E CAUK 0F FAILtRE.. M Vu PACXING REACED IT$ MTlRAL D0 0F LIFE. MIT.............. 135 N G............... A391, ANCHOR / DARLING V M C0 W G MODEL IM O S.. $ 70 W 00 D66............. 00010 DGGU............. IN DGA.............. E q CAUK OF FAILt2E., INSPECTIONS EVEALED THAT M TWO DISCS E 80ED INTEAfDING WITH M VM 800Y P0$$1BLY E$ltfANT OF MRML DPNISION OF WATD DTRAPPED By M DISC $ FROM M ES. J HIT............... t h W 6............... A391, ANCHOR / DARLING V E C0 W G MODEL 10 0 0. S 70 W 00 ENGG............. 00010 D6G0............. IN ENGA.............. E CAUE OF FAILtRE. VM $ TEM Als FACKING H DRY. HIT.............. 137 N G............... A391, ANCHOR / DARLING V u C0 W G MODEL IU S G., S 70 W 00 D66............. 00010 DG0U............. IN D6A.............. E CAUK OF FAILLAE., CAUSE (fM04. VW OPDATED PROPDLY ON TWO $l4MQUENT ATTEWi$ FAILURE l#0ER INVE$f!GAi!0N. HIT.............. 138 M G............... A391, ANCHOR / DARLING V W C0 W G MODEL IU SER., $ 70 W 00

EMG............. 00010 EEGU............. IN ENGA.............. E m CAUSE & FAIL lA!.. INSPECT!0k$ REVEALED THAT M TWO DISCS WERE 80ED. INTEf!AING WITH THE kW 800Y FOS 5IBLY RESULTANT OF M p ut (IfANSION OF WATER _EhiRAFPED BY THE 0!$C$ FR31 M RCS. HIT.............. 139 M G............... A391. ANCHOR / CARLING V R C0 7 ENGGU............. ENGA.............. E CAUSE OF FAIL lRE., IT WAS NOTED THAT VW WAS LfAKING IN 80es(T AREA. BORIC ACID BUILDLP FOUW. CAUSE: FACKIE EAROUT. Hlf.............. 140 M 6............... A391. ANCHOR / DARLING V M C0 W G MODEL M BER., $70 @ 0 ENGG............. 4 EMGU............. IN ENGA.............. E CAUSE OF FAlltat.. DISA55EMBLY OF M VM $H0WED THAT PACKING MATERIAL WA$ ORY. $HOULD HAVE KEN Ll8ED. MIT............... til W G............... A391, ANCHOR / DARLING V W C0 N G MODEL M IER.. VM-56FJ 10x8Il0 $350 ENGG............. 10 ENGU............. IN ENGA.............. E CAU5E OF FAILtaE.. M CAUSE OF M FAILURE !$ ATTRIBUTED TO WAR / AGING OF M PACKING, MIT.............. 142 5 6............... A391. ANCHOR / DARLING v u C0 WG MODEL IMEER.. VM-54fJ 1018I10 $350 ENGG............. 10 ENGGU............. IN ENGA.............. E CAUSE OF FAILtRE., M FA!LtRE RESULTED FROM NORMAL EAR A2 AGING OF M PACKIM. Mlf.............. 148 NG............... A391. ANCHOR / DARLIM VM C0 WG M000. NMER.. $350-@0 ENGG............. 10 ENGGU............. IN ENGA.............. E CAUSE OF FAILtRE.. $EAi$ ARE 6VuGED. Hli.............. 149 WG............... A391. ANCHOR / OARLIE VG C0 NG M000. NMER. 10 I 4 X 10 ENGG............. 10 ENGGU............. IN EMA.............. E CAUSE OF FAlltaE. M $ EAT A2 DISC E WORN. HIT.............. 150

MG............... A391. AN00i / CARLING VALVE C0 WG M0KL sutut., 10I8110 ENGG............. 10 ENGGU............. IN ENGA.............. E - - - ~ ~ - - - - - ~ ~ - ~ ~ - - - - - - - CAUSE W FAILutE., M fAlllRE Id5 DUE TO A MNLFACMIE DEFECT MCAJSE OF TEMER EMBR! FILED CON 0!Il0N W M 410 STAIN.ES$ $ TEEL $7th$. hII.............. 151 WG............... A391. AN00t / DARLING VW C0 WG M0KL Nup0ER., 10 I 8 I 10 ENGG............. 10 ENGGU............. IN ENGA.............. E CAUSE Of fAILWlE., M $ EAT W 0!$C R m. HIT.............. 152 W G............... A391, ANCHOR / DARLING VAL W C0 WG MODEL IU9fJt. 5350 W 00 EMG............. 10 056U............. IN ENGA.............. E CAUK 0F FAILtlE., WAR OF $ EAT AfC DISC. HIT.............. 153

G...............

A391. AN00t / DARLING VW C0 WG MODEL IUEER.. 10$7020-300 ENGG............. 10 ENGGU............. IN ENGA.............. E CAUK OF FAIL l2E., FOU$ R$i!NGHOUSE 012 CCWIROL SWITCH A$$09LY $0tEW LOOSE, SWITCH LOCATED AT MIN CONTROL BOARD. MI T.............. 1 % WG............... A391. ANCHOR / OARLING VALVE C0 WG M0KL IU9ER. 61&X6 ENGG............. 6 ENGGU............. IN ENGA.............. E CAUK 0F FAlltaE. M POTENTIAL CAUSE OF THIS FAILtRE !$ KLIEVED TO K VW STEM FRICTION BUT If COLLON'T K PROVEN. H!i.............. 155 W G............... A391. ANCHOR / DARLING V W C0 WG M0KL mot.. % 12349 ENGG............. 4 ENGGU............. IN DEA.............. E CAUK 0F FAlltaE.. NORML EAR OF M PACKING CAUSED M LEAKAGE. HIT.............. 1 % WG............... A391. ANCHOR / DARLING VW C0 WG MODEL titer., N 12349 D56............. 4 0560............. IN ENGA.............. E

cm W FAILtat.. MAL PACKIE WDR Hlf.............. 157 5G............... A391. ANCHOR / DARLING VW C0 W G MODEL M ER.. 9412389 ENG4............. 4 ENGGU............. IN ENGA.............. E CAUSE OF FAILtRE., MAL EAR 7 M PACXING CMD M LEAKAGE. HIT.............. 159 W G............... A391. ANCHOR / DARLING V R C0 N G MODEL IU 80t. 93-13019 ENGG............. 4 ENIGU............. IN ENGA.............. E CAUSE 7 fAlltaE.. C W 0F FAILLME LACETERMI G. HIT.............. 160

6...............

A391. ANCHOR / DARLING VE C0 W G MODEL M ER.. 9313019 ENGG............. 4 0E6U............. IN ENGA.............. E C W 0F FAI N.. CAUSE OF fAILtRE U S ETD PI B. H1f.............. 161 N6............... A391. ANCHOR / DARLING Vu to WG MODEL IU 80t., 11906 056............. 4 ENGGO............. IN DEA.............. E CM 0F FARLSE. DCE$$M FRICTION ON M VM STER M T0 f!GHT PACKING. Hli.............. 162 W G............... A391. ANCHOR / DARLING V u C0 WG M000. MER.. $20020 D66............. 4 0560............. IN ENGA.............. E CAUSE Of FART 3E.. M VM WOLLD NOT CLOSE flLLY DUE 10 $0 LID!f!ED 80RIC ACID IN M VM $ EAT. N!i.............. 163 WG............... A391. ANCHOR / OARLING VW C0 NG MODEL Mut. 4 GM42fB 056............. 4 D5G0............. IN 05A.............. E CW 0F FAILtRE., AGED A2 DETERIORATED 800Y TO BMT GASKET CAUSED M LDK IN ILCWC1128. H11.............. 164 W G............... A391. ANCHOR / DARLING V W C0 W G MODEL M 0t., 10-$70-W-00 ENGG............. 10.0

ENGGU............. IN EMA.............. E CAUSE OF FAILtRE., 80RIC ACID 8tJLD# ON VALVE Sia CAUSED $TICKIW PR06Les. HIT.............. 16$ WG............... A391. ANOW / DARLIE VEVE C0 WG M000. MER., 10-$70+00 D66............. 10 EEGU............. IN EMA.............. E CAU$E OF FAILtRE., VALVE $ TUCK ON CLOSED $ EAT. HIT.............. 166 WG............... A391. ANCHOR / DARLING VALVE C0 NG MODEL MER., 10-570-W-00 D60............. 10 ENGGU............. IN D64.............. E CAUSE F FAlltaf.. $ MALL MOLNT OF 80RIC ACID WA$ fm ON $TER. HIT............. 167 MG............... A391. ANOG / DARLING VM C0 WGMODEL 20. 10 $70+00 D66............. 10 D660............. IN ENGA.............. E CAUSE OF FAlltat.. LACK W LtSRICAi!0N - BIMING IN PACKING GLAG AREA. HIT.............. 169 W G............... A%1. ANCHOR / DARLING VALVE C0 W G MODEL lu e G., S-350 + 00 056............. 4 DnGU............. IN DGA.............. E CAUSE OF fAILtRE., EM0$!0N OF $UT CAU$ED LDKAGE. HIT.............. 170 W G............... A391. ANCHOR / DARLING VALVE C0 W G MODEL M G.. $-350 + 00 ENGG............. 4 D66U............. IN DGA.............. E CAUSE OF FAlltaE., EMc$10N OF $ EAT CAUSED LEAKAGE. Hlf.............. 171 W G............... A391. ANCHOR / DARLING V M C0 W G MODEL lu eER.. $-350 + 00 D B6............. 4 0560............. IN D64.............. E CAult 0F FAILtRE., LfALAGE WAS Ott TO SEAT 005!0N. HIT.............. 172 MG............... A391. ANCHOR / DARLING VALVE C0

WG MODEL NUMER., S-350+00 ENGG.............. ENGGU............. IN ENGA.............. E CAUSE Of fA! List.. AO AND DETU!0 RATED POING. HIT.............. 173 W G............... A391, ANCHOR / DARLING V G C0 WG M0KL MNER., S-350-W-00 ENGG.............. ENGGU............. IN ENGA.............. E CAUSE Of fAILtRE. NOR m L E 2 0F LIFE FOR P O ING. HIT.............. 174 W G............... A391. ANCHOR / OARLING V E C0 WG M00CL MNER., $ 32-W40 ENGG............. 4 ENGGU............. IN ENGA.............. E CAUSE Of FAILtM.. NORML E2 & L!ft FOR PACKING. MIT.............. 175 WG............... A391. ANCHOR / DARLIE VW C0 W G MODEL IM EER., $-350 + 00 DNG............. 4 ENGGU............. IN ENGA.............. E CAUK Of fAILLAE.. AGED A2 OCTDIC4ATED PACKING. H!i.............. 181 WG............... A391. ANCHOR / DARLING VM C0 WG 100EL IUSER.. 5-35040 E E.............. & D56U............. IN ENGA.............. E CAUK Of FAILt2E. 2$!08801A LEAKED f)90, 80RAi!NG M tali. MIT.............. 182 W G............... A391. ANCHOR / DARLING V M C0 W G MODEL IM EER., $-350 4 0 D54............. 4 DEGU............. IN ENGA.............. E CAUK Of FAILIAE.. POS$!BLE f0K!GN mtDIAL mf K PRE 5DIT IN VW PACKING HIT.............. 183 W G.'.............. A391. ANCHOR / DARLING V E C0 W G MODEL 1U 9 9.. $-350 4 0 D 86.............. 006U............. IN 05A.............. E CAU2 0F FAILLAE., 25!0M018 LEMED T)9U. 80RAi!NG M tali.

HIT.............. 184 C6............... M91. ANCM0A / DARLIE VALVE C0 CG M00(L NNG., $-350-WD0 D66............. 4 D6GU............. IN DGA.............. E CAUSE OF FA!LW. T4 VALVE APPARENTLY'iWQUED OUT*0N CLO$!NG. INSPECTION REVULED A $ LIGHT DEPOSIT ON T4 $7EM 0F T4 VALVE ThAT MAY HAVE REQUIRED DCE531VE IN!!!AL CLO$1% 10RGUE HIT.............. 115 WG............... A391. ANCHOR / DARLING VALVE C0 W G MODEL lu eER., $-350-2 0 D66............. 4 D 6G0............. IN DGA.............. E CAU$( Or fA!LW. MOTOR OPDATOR WAS TORGUED OUT. MIT.............. 187 W G............... A391. ANCHOR / DARLING VALVE C0

6 MODEL putfR., $350400 DGG............. 4 ENEGU.............

IN EE A.............. E CAUSE & FAILtst.. N NO W. HIT.............. 1M

G...............

A391. ANCHOR / DARLING VALVE C0 W G MODEL lu etR., $133 + $A DGG............. 10 D 660............. IN DGA.............. E CAU$f 0F FAlltat.. ORY PACKING LDDING TO DCE$$1YE STEM FRICTION. MIT.............. 190 WG............... A391. ANCHOR / DARLING VALVE C0 W G MODEL lu etR.. $350 2 0$1500 D6G............. 10 (NGGU............. IN E E A.............. E CAU$t W FA!Llat.. LOOSE PACKING GLA2 f0LL0ER HIT.............. 191 NG............... A391. ANCHOR / DARLING VALVE C0 WG MDML lutER., $40W-300 (NGG............. 6 D06U............. IN DGA.............. E CAust Of FAILtRE.. PR08A8LI CAUSE. VALVE $flM NOT PROPERLY LUBRICATED AW CLDNED. MIT.............. 192 W G............... A391. ANCHOR / OARLING VALVE C0 W G M00CL I& eER., $6000 D66............. 6 ENGGU......... IN

EE4.............. E CAU$t Of FAILlat.. PR08A8LE CM, VM SIER NOT PROFERLY L'J8R!CATED W CLEAED. HIT.............. 195 W G............... M 91. ANCHOR / DAALING V G C0 WG ML 100G.. N0E D64............. 6 D660............. IN En a.............. E CAUK Of FA!UJE. M fc!NG ON VW IfWD39C ES 100 i!GHT. H!i.............. 1% WG............... M91. ANCHOR / CAALING VG C0 C6 MODEL IMEER., N0E EN %............. 6 DGGU............. IN D64.............. E CAust of FAlltat.. M UACT CW W M LEM ON VM 1FWO618 CANNOT K KitRMMD. BUT NMMAL WDR CAN K $USPECTED. Hli.............. 197 WG............... A391, AEHOR / DARLING VW C0 WG MONL lueER. 9313H14* 900 (NGG............. 4 (NGGU............. IN ENSA.............. E CAust W fAlltat.. IMSI!GATION OLAING M f!R$f AVAILABLE ORMLL ENTRY $ HOED THAT M ROCTOR CORE 150LAi!0N COOLING ( K!C 1 $YSTEM 1800M0 $ TEAM LM ISOLAi!0N VG HV-2f007CEA El LEMM TMOUGH ITS POING. MS POING LEM E$ M TO WAR. MIT.............. 198 WG............... A391. AKHOR / DARLM VALV.' C0 WG N00tL luetR., 93136M 20' 300 D14............. 4 ENIGU............. IN D64.............. E CAU5C Of fA!LLN., AFTER IM$f!GAi!0N If m$ MitRMMD TMT M CW Of THIS EVDIT E$ DLE TO M PRE $$URE $DL m$ NOT KING flLLY SEATED. ROOT CM l4RNOW AT THIS IIT. HIT.............. 199 WG............... A391. ANort / DMLM VM C0 W G MODEL 1U 0 0. 93 13711 10' 900 D6G............. 10 ENIGU............. IN DGA.............. E CAUSE Of FAllta!.. !Mlf!GAi!0N If MCHANICAL MINTENANCE REVULED TMT M POING E$ Ile(ID 8A0 W Tu m$ N0 TMIT Ltfi TO A0JU$f. TH!$ m$ M to EAR. H!il............. 200 WG............... A391, ANCHOR / DMLM VW C0 WGMODELluetR.. 931341110*900 D64............. 10 D16U............. IN D64.............. t (W Of FA! LIM., CW TOR LOO $t AND M!$$N 80Li$ (NJON. PR08A8LY V!8AAf!* W WDR.

N!i.............. 207 W6............... M91. ANOG / OMLIE VM C0 W G MODEL E M60. 0WG 1632-38 EEG............. 13 ENGGU............. IN ENGA.............. E CAUSE W FAILIAE., M CAUSE OF M W 20$97 VALVE LEM ES EM OR AGING W M VW PACKING. H!i.............. 210 MG............... M91, ANCHOR / OAR' !NG VM C0 NG MODEL NMER. 1629-3C D 66............. 6 ENGGU............. IN DEA.............. E CAu$t Of FAILWE., M VW $ EAT WAS $L!GHTLY 0!$f0RIED. ALLOWIE SLIGHT LEMAGE KMD M $ EAT W 0!$C. THIS !$ KLIEVED TO K DUE TO NORMAL U$ AGE. HIT.............. 211 WG............... M91. ANCHOR / OARLING Vu C0 WG M0KL lugER.. ( 150 DG4.............. DGGU............. IN ENGA.............. E CAU$E OF FAILtst. M $ FEM PACKING m$ FOLAC TO K B!l@!NG DCES$!vELY ON M $ FEM NORMAL AGING W LACK 0F Ll8RICAi!0N CAUSED M DEf!CIDCY. H!T.............. 212 WG............... M91. ANCHOR / OMLING VW C0 N G MODEL IM EER., 3fE0666-WG-10 D66............. 6 D G60............. IN DGA.............. E CAUSE OF FAILtK.. M PACKING NUT ES GALLED W ColLD NOT K ADMIED AS M PACK!NG WORE. M CAU$t & M GALLED WT MS NOT K D C(TE R M D. HIT.............. 213 i W G............... M 91. ANCHOR / OARLING V E C0 WG M0KL 1000. 4!N-900LB DGG.............. & D660............. IN DGA.............. E CAUSE W fAILWE., UldtN0lal. CMD NOT f!e PACKING, If l$ NOT ENolai HMR M VW ms IN$tALLED WlIMOUT M PACKING OR M PACKING El OL0lal cui. HII.............. 216 46............... M91. ANCHOR / OMLING VW C0 W G MODEL su gER., 10-E80-41 D64............. 10 ENGGU............. IN DGA..............,E _ _ -~ --- - CAUSE F fAILIN..) M VW MANLAL OPERATOR INTERMLS ERE DAMAGED. M KVEL, E P!VIGN GEMS KRE DAMAGED M M MU$f "--------..EN. M ROOT (AUSE M$ NOT KEN DETERMD. K MIE M$ FR0Z

HIT.............. 217 WG............... M91. ANCKA / OARLING VW C0 WG MODEL NUM6G., 4-C6647 A0 EM G............. 4 E M............. IN DGA............. E CAUSE OF FAILtRE., M PAdt!NG FAILED W M Sf!M let!CH W DAMAfiD EARLIEA M 10 PACK!E FA!LlRE liA$ FM CAMAGED HIT.............. 218 WG............... M91. ANCHOR / 04KDG VM C0 WG M00EL MIG., 4-00841 A0 D64............. 4 E M............. IN DGA.............. E CAUSE W FAILtRE., PACK!$ Id5 TOO $0FT W 100 LOOK HIT.............. 219 WG............... A391. ANCHOR / DARLING Vu C0 WG M00EL MIER., 4-0084T A0 DGG............. 4 E M............. IN DGA.............. E CAUSE OF FAILURE., M PAut!NG In$ COWLETELY 60E W M VM $ TEM HAD MEP CUTS W KRATCES. PACKING FAILtRE PR06A8LY M TOV!8RAi!0N. NIT.............. 220 WG............... A391. ANCHOR / DARLING VG C0 WG MODEL 1U98. 4-00841-M0 ENGG............. 4 DG4U............. D DGA.............. E CAuK 0F FAILtRE., M ROOT CAUSE OF M FAILURE HAS NOT MEN MIGHMD. If !$ ELIMD THAT M _VM 0!$C W 8!$1NG. HIT.............. 221 W G............... A391. ANCHOR / OARLING V W C0 WG MODEL IMOG. 4-C6641-M0 D64............. 4 DG4U............. IN DGA.............. E CAUSE OF FAILLN.. M VAM 0!$C WAS I!$ING RE$lA fDG IN DAMAGE TO M O!$C. M ROOT CAuK NAS NOT KD KTEMMD. MIT.............. 222 WG............... A391. ANCH0R / OAAING WW C0 WG MODEL 109G. 4-EBC4T-M0 DGG............. 4 E M............. IN DGA.............. E CAUSE OF fAILtRE.. M VW $ TEM Id5 false 70 K 8 MING M 70 IWROFER IN$fRAi!0N. M EAT In$ ALSO WORN. HIT.............. 223 WG............... A391. ANCHOR / DARLIIN, VW CC WG MODEL luSER. 4 00C47 A0 DIG............. 4 DGGU............. IN

DGA.............. E CAU5E 7 FAILtRE., M VALW DISC MO KEN DA%ED DUE TO M FORCE DERTED D CL0$!E BY M $PR!W TERATOR. THI$ !$ NOWL DfECTED E AR FOR THI$ TYPE OF VALVE. HI T............... M4 M6............... M91. ANCHOR / DARLING VALVE C0 NG MODEL IU90t. 6-16C-Gi M0 D66............. 6 DGGU............. IN ENGA.............. E CAUK Of fA!LLM., M VALVE INTERNAL $ ERE MGRADED. M ROOT CAU$E APPEM$ TO K NORML EAR, HIT............... M$ WG............... M91. ANCHOR / DARLING VALVE C0 NG M00EL 1U90t. 6-+96-Gi-A0 D66............. 6 ENGGU............. IN ENGA.............. E CAUK Of fA!LLM. M VALVE DTERMLS ERE WORN. M ROOT CMSE AffEMS 10 K NORML EM. HIT............... M6 NG............... M91. ANCHOR / DMLING VALVE C0 NG MODEL IU90t.. DWG-9313199 DE6............. 4 D660............. IN D6A.............. E CAUIE OF FAILLM..[0!$A$$D9LY A$ INSPECTION OF M MNUAL OPDATED VALVE REVEALED MIT............... M7 WG............... M91. ANCHOR / DARLING VALW C0 WG M0KL IUSER.. DNG 93-14907A D66............. 10 ENGGU............. IN D64.............. E CAUM Of fA!LLM.. (FON INSPECTION IT E$ REVEALED TMi M MNUAL GEM TYPE OPDATOR FINION RA0!AL MMIES ERE 8R0lO, M CAU$E Of fA!LLM !$ LIM 0m BUT M MO$f PR06A8LE CAUSE WA$ THOUGHT TO N A LVOR,1CAi!0N PROBLEM. HI T............... M8 WG............... M91. ANCHOR / DARLDG VALW C0 NG MODEL IUSER. 0WG 9314907A DEG............. 10 ENIGU............. IN DGA.............. E CAUK OF FAILtM., INVE$i!GAi!0N REVEALED WORN PDION MMIWS IN M GEM WERATOR. IT E$ THOUGHT TMi A LACX OF LUIRifAi!0N A$ M UK OF AN AIR ORIVEN WENCH TO CfERATE VALVE MY MVE REN M CAUSE OF KMIW FAILURE. H!i............... M9 NG.'.............. M91. ANCHOR / DMLING VALW C0 NG M0KL IUSER., DWG 93 l&907A ENI6............. 10 DG8U............. IN D64.............. E CAU5E OF FAftlM..{lFON'0!$A$$09LY OF M Mf8)AL OPERATED VALVE. A CAWED GUIM COL

HIT.............. 230 WG............... A391. ANCHOR / DARLIE VALVE C0 WG n00EL NUMBER., E42084 EN6G............. 10 EN6GU............. IN ENGA.............. E CAU5E OF FAlltaE., MAT W 015C WORN ALLMNG LEMAGE. HIT.............. 231 C G............... A391. AICH0R / DARLING VALVE C0 WG MODEL fueER.. IW 5A EN66............. 4 EN660............. IN ENsA.............. E CAUE OF FAILLNE., M OLD PACK!E$ FAILED M TO NOMAL AGE / WAR. H1f.............. 232 WG............... A391. ANCHOR / DARLING VRW C0 W G M00EL lu eER. 9 5 30 ENEG............. 10 EN06U............. IN EN64.............. E CAUK OF FAILLM. COMO$!0N OF M CARBON STEEL $fLO$ DE TO 80RON CONTAMINAi!0N, Mlf.............. 233 WG............... A391. ANCHOR / DARLING VALW C3 W G MODEL lu eER. 9 5 30 ENGG............. 10 EN6GU............. IN ENGA.............. E CAUK OF FAILLME.. F0tmD DIAT Al0 DEGRIS ON SEAT. Ml f.............. 2M NG............... A391. ANCHOR / DARLING VALW C0 W G MODEL IU SER. 995-3C ENEG............. 10 ENEGU............. IN ENGA.............. E CAUK OF FA!LtRE., WORN 0!$C AfC MAT. MIT.............. 235 WG............... A391, AsDeR / DARLING VALW C0 W G MODEL fu eER. 945-36 (NEG............. 10 ENIGU............. IN EN6A.............. E CAUE OF FAILtM.. Site MATERIAL FR00LEM. Ml f.............. 2% N G............... A391. ANCHOR / OARLING VALVE C0 WG M00EI. pueER., 0WG N0 9314106 ENIG............. 4 EN06U............. IN ENGA.............. E

CAUSE W FA!LLPE. VALVE PCIE WM0Ji. WILL K REPA! RED DL.61% EIT REFUEL!% OUTAGE. HIT.............. 237 WG............... A391. ANCHOR / OMLIE VALVE C0 NG MODEL lue0t.. M NO 93-!&106 LMG............. 6 E M............. IN ENGA.............. E CAUE Of FAILt#tE., PRIV!0VSLT ADMTED PACK'mG ON 3/12/86. ON 7/22/36 LEAK MCME UhACCEPTA8LE. CMED BY EMOUT Of PACK!NG. MIT.............. 239 NG............... A391. AN010R / DARLING VAiVE C0 N G MODEL lu e0t.. OWG N0 3165-3 EM G............. 6 EM............. IN E n A.............. E CAU E W fAILtflE., CAUSE: NORMAL PACK!NG ERO$!0N/ WAR Wt!CH RE$llf$ FROM OPERAi!0N. HIT.............. 260 NG............... A391. ANCHOR / DARLING VALVE C0 NG M0KL IUsut. 0WG N0 3165 3 EN64............. 6 E M............. IN ENGA.............. E CAUE & FAILtfil., VALVE PACKING GLAl@$ HAD REAQED TEIR E2 Of L!fE. HIT.............. 241 W G............... A391. ANCHOR / DMLING VALVE C0 W G MODEL M IER., DWG No 3165-3 ENGG............. 6 EM66U............. IN EnA.............. E CAVE Of TAILtflE., f0uc PACK!NG HAD WDRN OUT ( E2 Of LIFE ). H!i.............. 242 WG............... A391. ANCHOR / OMLING VALVE C0 NG MODEL MIut. 0WG N0 31%-3 E E G............. 6 E M............. IN ENGA.............. E CAVE Of fA!Ltfit.. VALE PACK!NG WORN, NAS REACED E2 Of L!ft. HIT.............. 2&3 NG............... A391. ANCHOR / OMLING VALVE C0 WG MODEL IU90t., 4 GM62f91 ENGG............. 4 E M............. IN ENGA.............. E CAU$l Of fA! Lute. NORM. EM Of PACKING. H!i.............. 244 W6............... A391. ANCHOR / DMLING VALW C0 WG MODEL NWelR., $350W 00 EEG............. 4

l%GU............. IN EN6A.............. E CAUSE OF FAILW.. VW LfEA&E m$ M TO LOC $t POING not!CH ALLMD $@0h CRY $fAL MLDLP, MIT.............. 24 5 NG............... A391. AGOR / DMLING vu C0 W G MODEL IU SER. 5350W 00 INi4............. 4 DGGU............. IN D64.............. E CAU5E OF FAILW.. $U$PECT INTUML PMil CAU$1NG MCmNICAL 81Nt!NG PMA8LY M TO EAR. MIT.............. 246 WG............... A391. AGOR / OMLING VW C0 WGMODEL 10 0 0. 93 14978 ENGG............. 4 ENGGU............. IN DEA.............. E CAu$t & FAILM.. DIRTY VW INTERMLS M TO CORRO$ ION CAU$tD Of RAW WitR PA$$1NS TWOUGH VW INIDMLS. MIT.............. 2$0 WG............... A391. AGOR / DMLING VW C0 N G MODEL pu tER. DAWE 93 14490 DE4............. 6 D66U............. IN D6A.............. E CAU$t 0F FAILW.. PACI!NG m$ ORIGIML Pact!NG IN$fALLED OWING CON $fMf!0N, Pact!NG hl Wom0VT W mf M4 20 mfDIAL AIC IN$fALLAf!0NPR00LEMS. H!f.............. 2$1 WG............... A391. AOM / DMLING VW C0 W G M00tL 1U 0 G.. DAWG 93-142$1 D66............. 6 (NGGU............. IN DEA.............. E CAu$t 0F FAILW., VW SEAT m$ 8AOLY $ CORED M TO NORMAL EAR. HIf.............. 252 WG............... A391. ANCHOR / DMLING VW C0 NG M0C(L 1U00. 0AWG 9314289 D64............. 4 DEGU............. IN DGA.............. E CAU$t 0F FAILW., PROILIM KLIEvt0 TO It (09!Mf!0N W IMROPM ORIGINAL PACX!NG A10 WEAR 0UT W PACKING. HIT.............. 253 NG............... Alt!. ADOR / OARLING VW C0 W4 M00tL 1000.. CAWG 93-14281 D64............. 6 ENIGU............. IN D6A.............. E CAUK W FA!LW., CAust AfrtMED TO K 0!Rif $tAf. MIT.............. 254

W6............... Mll. ANCMOR / DMLIE MVC C0 W6 MODEL IMKA. 026 h7820134 (N06............. 10 tug 6U............. IN ENEA.............. t CAust W FAILW., MVC IWERES WRC 0!Rff A2 812!NG. MIT.............. 256 W6............... A391. ANCHOR I OWL!N6 MW C0 W6MODELIUttR.. 0269314249 tul6............. 4 DNQU............ 1N 084.............. E CAuK W FAILtN.. KLIEWD 10 N IDA / AGING RELAftD. Mi f.............. 2% W6............... A391. ANCMER / DeLING MW C0

6 MODEL NWelt.. CNG 9314249 006.............

4 D88U............. IN D5A.............. t CAult W IAILLN.. NL!!WO TO N WAR / A6!NE RELAff0.

ANCHCil0A#LINi !! N H V U E F4ll'AES POPULAi!CN s 6% VALVES NPRD(CMPCNENTFAILVPE(4C)013 PLAY %!i............... t4 W 6............... A391. ANCHOR I DARLING VALVE C0 W6 M0KL NUMER., 886 3 E M6............. 14 [ H............. IN E %A.............. E (AUSE OF FA! LURE.. THE VALVE SEAi!%6 SVRFACES bE E R M H AND O!RTY, H!i.............. 15 C 6............... A391. M(NOR / OAE !N VALVE (O C6 M0EL WMEl., M NO 1212-3 E H6.............. t4 E H............. INCH EMA.............. E CAUSE OF FAILVE., SEAT LEMA 6E ON COE SPRAY YALVE 2 E21-F00tA WS DVE 10 SEAT ER0510N CAUSED If CRMAL BEAR. W6............... A391. MCH0A / DAE!N VALVE C0 W6 MML WMIER., M-M But4 810910 E M6.............. t4 E M............. IN E~D.............. E CAUSE OF FAILVE., VAlti(EDS MPACN!N 40 ESEALING. H!f.............. 19 W6............... A391. MCH01/ DAE!E VALVE C0 E6 MONL WMER., M-NO tW14 810910 ( M6............. 14 E E............. !N E MA.............. E fr (AUSE Of FA!LUE., SEAT 40 01SN ME BARY WON H!i.............. 20 W 6............... A391. M(HOR / 04E !W VALVE (0 C 6 MO NL M ER.. M NO 8W14 l!0910 EN66.............. !4 E G............. IN E NA.............. E CAUSE OF FAILVE., (0VLD HAVE BEEN PNV!0VS NPA!R e WHl(H DID NOT f!6HfEN 10iH Wil EQUALLY. THE LEM COVLD HAVE STARTED Af tE IFE OW !!GHT Wi (Mt Oui CF ADJUSTMENT DUE TO WAR CN PACK!N I!NS. W6............... A391. 2CH04 / OARLl4 VALVE C0 C6 RONL WMIEA.. M NO 1212 3 E M6............. 14 E W............. INCH E 44.............. E (AVSE Of FAILV M.. (AVSE OF fl008Lt W S OVE TO O RMAL BEAR,

W............... .F3............... G !. a :.:: ' :Lhi '.r.',i :2 FFi CEL NL"!ER., Ni O!.!4 i!9M E %i............. 14 E %5V............. N H D64.............. CAL'5E CF FAILV:!.. THE ffE" 197 8 ETA 31% A!% W3 FCOND 20iitaE) OUT AiAh57 IHE Pl?E DFEAD. NS IS IW ROPER ?AINTENMCE, HIT.............. 25 56............... A391. MCH0A / DARL! E VALVE C0 5 6 MODEL NUM8Ef., CWi-h0 BW14 810910 E %6.............. t 4 E W............. INCH D6A.............. E (AUSE OF FAILURE., E41 F006 VALVE SEAT WAS PlitED 40 SCAARED. THE FAILUPE WAS DETER 91NED TO HAVE BEEN CA0 Hlf.............. 26 C6............... A391. MCH04 / DARLING VALVE C0 W6 M L NYWER. 0W6 4 BW14 It0910 [ W6............. 14 E E............. INCH E MA.............. E CM OF FAILUE., APPAENT CAUSE OF FAILVE WAS WORN PAC 41W. Hli.............. 27 E 6............... A391 ANCHOR / OARLIM VALVE C0 5 6 M L NYMIER. 0W6 N -BW14 l!0910 EE6............. 14 E E............. !NCH E %A.............. E (M GF FA!LUE., CAUSE Of IR19tE WAS CUE TO WORr 'A3196. H!i.............. 29 C6............... A391. MCHOR / OHLIN VALVE C0 U 6 M L M IER.. DW6 4 BW14 83713 E M6............. 14 E E............. IN E NA.............. E CAVSE OF FAILVE.. THE CAUSE Il lEIN AffillVTED TO NOR9AL WEA120 TEAR. Hlf.............. 47 W 6............... A391. ANCHOR I DAALIM VALVE C0 W6 ML NYMIER.. 931370914'900 D66.............. I4 E E............. IN ENA.............. E CAUSE OF FAILUE.. THE CAUSE OF THIS EVENT WAS A8WAL / NORMAL WEAQ ON THE VALVE SEAT. T AMOVNi.

eli............... H a.F3............... G 1. n :-:3,:R Isi x.E :0 'Fi 50 !L U i!4.. i!!%:0 ENi!............. 14 E % iU............. !1 245A.............. E CAUSE OF Fall'.*E., ENSINEERIM TESTS !O!CATED THAT THESE VALVES 14f NOT OPE 10%ER 0!SI54 CELTA-P C:elil:NS, Hlf.............. 54 W6............... A391. ANCHOR / DARLIM VALVE C0 MF6 MKL WWER.. St50W0 EM66............. 14 E M............. IN E MA.............. E EAUSE OF FAILURE., ENSINEERING TESTS !MDICATED THAT THESE VALVES MAY NOT OPEN UNDER DESIGN DELTA-P CONDIT!0NS. HIT.............. 55 06............... A391. ANCHOR / DARLI E VALVE C0 MF6 M KL R NER. 5110% 0 E W6............. 14 E E............. IN E MA.............. E CAVE OF FAILVE.. VALVE PACN!W WAS WM 20 HA0 NACHED liS END OF LIFE. Hlf.............. 54 W G............... A391 ANCHOR / 0AR ING VALVE CO 56 MNL WMER. 5150WO [M 4............. 14 E M............. IN EN64.............. E 8AUW 0F FAILVE.. FOUM PACN!W HAD WM OUT BY MMAL USE. Hli.............. 61 MF6............... A391. ANCHOR / OAR IM VALVE CO WG MKL WP8El. 9412391 E M6............. 14 E W............. IN E MA.............. E CAUM OF FAILVE.. VALVE FAILED DUE TO BONNET OVERPMS$VI!!Ai!04 Hlf.............. 63 R6............... A391, MCMI / DAILIM VALVE C0 W6 N0EL N'JNER., S M E E4............. 14 E M............. IN E NA............. E CAUSE OF FAILV K.. CAUSE OF FAILV E NOT kNOM.

HIT............... :i W5............... ali:. 4:, :M.Bi,*.'.! : "Fi G EL v.N ER., i!- T' :l'-E0 0 55.............. it b59)............. M 95A.............. E CAUSE OF FA!LV8E., A:TER IN'.'EST!SATICN If WAS CETERMBED TFE CAUSE CF THIS EVENT WAS DLE TO N:4AL 'dE4R AND Aihi. HIT.............. 70 M S............... A391 ANCHOR / DAE ING VALVE C0 W6 M L WMER. 50E6tli EN66............. 14 E W............. IN EM6A.............. E CAUSE OF FAILURE.. VALVE STEM SCORED M0 PACKlh6 STUFFING BOI STEM CUT. Hli.............. 71 W6............... A391. MCHC9 / OAEING VALVE C0 W6 ML NUMIER. 996-3A E E6............. 14 E M............. IN E EA.............. E CM OF FAILURE., NOMAL EAR. Hli.............. 72 5 6............... A39ti M(Not / OAE I N VALVE C0 W 6 M L NUMIER., 996-3A E M 6............. 14 E M 6U............. IN E MA.............. E EAVSE OF FAILU K. NO MAL E AR. Hlf.............. 73 W6............... A391, MCHOR / OAILIE VALVE C0 W6 ML NUMIER.. S7000 E E6............. 14 E M6U............. IN E N A.............. E CAU$E OF FA!LU E., ORY PACK! W DUE TO NO MAL E AR. HIT.............. 75 W6............... A39ti MCHOR / OALIE VALVE C0 W6 MONL NUMIER., S7000 E M6............. 14 EM64. ;........... IN E MA.............. E CAUSE OF FAILUPE., JM NUT CAME LOOSE ALLOWIN STEM NUT TO BECM OISEMAGED WITH SPLINES DUE TO EXCESS VIBRATION.

I OfOlRYlO N : 2 & gcky ANCHOR /CARLING6LOBEVALVEFAILURES: NFRDCOMPONENTFAILURE(40) DISPLAY Hli.............. 2 MF6............... A391, ANCHOR / DARLING VALVE CO 4g y',{qof i MF6 MODEL NUMEER., 836-3 EN66............. 6 EN66U............. IN EN6A.............. F CAUSE OF FAILURE., THE DISC WAS NOT SEATING PROPERLY. Hli.............. 11 MF6............... A39ti ANCHOR / OARLING VALVE C0 MF6 MODEL NUMEER. 0W6-NO-EW6-B2814 EN66............. 6 EN66U............. IN EN6A.............. F CAUSE OF FAILURE.. AGE A U WEAR WERE THE ATTRIBUTED CAUSES. 40 /2 " y nIve FAo%2cs R Gqotb CD i e ---,n, ---,--.----,,---,---.-.--------,,---,,--.,,--n,--,r- +n --.--r v --.-n..---...,. -- _. -r

fo ?O/A] tb N

vnlyn ATW300MORRILLCHECKVALVESFAILURES:

gu C U A Ih NPRDCOMPCNENTFAILURE(4C)DISPLAf IL E Pd Lul?.E Hli.............. 12 MF5............... A585. ATW000 & MORRILL C0 INC / 10M01 MF6 MODEL NUPEER. 62!0-M-103-8.0 EN55............. 12 EN55V............. T ENGA.............. C CAUSE OF FAILURE.. THE CAUSE WAS NORMAL WEAR 0F THE PACKING. HIT.............. 30 MF6............... A585. ATWOOD & MDRRILL C0 INC / 10M01 MF6 MODEL NUMBER.. WE 150 CHECK,212F EN55............. 12 ENE5V............. IN EN5A,............. C CAUSE OF FAILVRE., CAUSE WAS ATTRIBUTED TO A DAMA5ED SEAT IN THE HPCI EIHAUST LINE STCP CHECK VALVE, BELIEVED TO HAVE BEEN CAUSED BYAPIECEOFMETALFROMTHEHPCIIUR21NECHAMBERBROKENLOCK1 ABS.S!!LOCKTABSWEREKNOWNTOBEBROKEN. CAUSIh5OTHERCAMAGEINTHESYSTEM.THEVALVEDISCWASFOUNDDUTOFADJUSTMENTANDADJUSilNSSCREWNUTSWEFE LOOSE.THISCONDITIONWASATTRIBUTEDTOEICESSIVEVIERATION. Hli.............. 31 MF6............... A585, ATWOOD & MORRILL CO INC / 10M01 MF6 MODEL NUMBER., WE 150 CHECK,212F EN55............. 12 E E 1............. IN EN5A.............. C CAUSE OF FAILURE.. FAILURE ATTRIBUTED TO NORMAL WEAR. Hlf.............. 95 MF5............... A555, ATWOOD & MORRILL CD INC / 10M01 MF6 MODEL NUMEER.. CEP09903236 EN55............. 12 EN55U............. IN EN5A.............. C CAUSE OF FAILURE.. THE VALVE SEAT WAS WDRN. Hli.............. 16 MF6.............. A555, ATWDCD & M0HRILL CD INC / 10M01 Pf6 MODEL NUMEER.. CEP09903236 EN55............. 12 E E 1............. IN EN5A.............. C CAUSE CF FAlltRE.. THE 0-91N5 IN THE VALVE WAS WORN 00T.

HIT.............. 97 MF6,.............. A585. ATWD00 4 MORRILL CD INC / 10M01 MF6 M] DEL NUM3ER.. CEP09903236 EN66............. 12 EN66U............. IN EN5A.............. C CAUSE OF FAILUEE. 0-RING IN CHECK VALVE WAS BAD AND A SHAFT BUSHIN5 WAS MISSIN5. HIT.............. 98 MF6............... A555. ATWOOD & MORRILL CD INC / 10MDI MF6 MODEL NUMBER.. CEP09903236 EN66............. 12 EN66V............. IN ENGA.............. C CAUSE OF FARURE.. THE VALVE SEAT WAS WORN OUT. HIT.............. 99 MF6............... A585. ATWOOD 8 MORRILL CD INC / 10M01 MF6 MODEL NUMBER.. CEP09903236 EN66............. 12 EN66U............. IN EN6A.............. C CAUSE OF FAILURE.. THE RUBEER 0-RING IN THE VALVE DISC WAS WOM OUT. Hli.............. 100 MF6............... A585. ATWOOD & MORRILL C0 INC / 10M01 - MF6 MODEL NUMBER.. CEP09993236 EN66............. 12 EN66U............. IN EN64.............. C CAUSE OF FAILURE.. THE 0-RINGS FOR THE HIN6E PINS WERE DEGRADED. HIT.............. 101 MF6............... A585 ATWOOD & MORRILL CO INC /10M01 MF6 MODEL N'JMBER.. CEP09903236 l EN66............. 12 EN669............. IN EN6A.............. C i CAUSE OF FAILURE., THE PACKING IN THE HIN6E FIN HAD FAILED ( WORN OUT ). HIT.............. 102 l MF6............... A585, ATWOOD 4 MORRILL C0 INC / 10M01 l MF6 MODEL NUMBER., CEP09903236 L EN66............. 12 l EN66U............. IN EN6A..l........... C CAUSE OF FAILURE., NORMAL WEAR AND TEAR ON THE VALVE SEAT CAUSED THE FAULTY OPERATION. HIT.............. 103 MF6............... A585, ATWOOD & MORRILL C0 INC / 10M01 MF6 MODEL NUMEER. CEP09903236 EN66............. 12 EN69)............. IN EN6A.............. C

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3oc(c.ac.c L 2, # Glo b6 yeNeS Fer/ orcs Pog o h 0 / cm = 3 c / 9u niv f )lb 5/nilozy Hli............... MF5............... R340. RD:KWELLINT/FLOWCONTROLDIV MF6 M00EL c !ER. 3626Y EN!5............. 2 EN 59)............. IN EN5A.............. F CAUSE OF FAILURE.. M0FMAL EAR AM AGE. Hli.............. 2 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER., 3626Y EN55............. 2 EN55U............. IN EN5A.............. F CAUSE OF FAILURE.. THE CAUSE WAS ERN PACKINE. HIT.............. 3 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUM!ER. MARK 130 EN56............. 2 EN56U............. IN EN5A.............. F CAUSE OF FAILURE.. THE CAUSE WAS DVE TO A BONNET LEAK. EARQUT. Hli.............. 4 MF6............... R340, ROCKELL INT / FLOW CONTROL DIV MF6 MODEL NUM2ER.. MARK 130 EN56............. 2 EN55U............. IN EN5A.............. F CAUSE OF FAILURE., THE CAUSE WAS DUE TO A PACKING LEAK. WEAR 0VT. HIT.............. 7 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. 2 IN 6 LOBE EN55............. 2.0 EN55U............. IN Ebbilbkh WASSEPARATEDFROMSTEM.REASONISUNKNOWN. Hli.............. 8 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV Pf6 MODEL NUMSER. 1065Y . EN56............. 2 EN55U.<........... IN EN5A.............. F CAUSE OF FAILURE., WEAR OF DISK MATERIAL. HIT.............. 9 MF6............... R340, RO: KELL INT / FLOW C0NTROL DIV P!6 MODEL NUPSER., 1065Y EN55............. 2 E M5U............ 14 EN5A.............. F

CAUSE OF FAILVRE.. CRUD B'JILD UP IN VALVE BODY AND HIN6E. HIT.............. 10. MF6............... R340 ROCKWELL INT / FLOW CCNTPOL DIV MF6 M00EL NUM2ER.'. 2-362MT EN66............. 2 EN66V............. IN EN6A.............. F CAUSE OF FAILURE.. UNKNOWN. HIT............... I1 MF6............... R340, FOCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. 3624F316J ENG6............. 2 EN66U............. IN A h bh l ilhkhl AUSE YET ] N, POSSIBLY BACKSEATING OR STRESS FAILURE HIT.............. 12 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. 3624F316J EN66............. 2 EN66U............. IN k'bhlkilbkhl[ AUSE YET (NKNOWN, POSSIBLY BACKSEATING OR STRESS FAILURE U HIT.............. 13 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL N'JMBER. 3626 ENG6............. 2 EN660............. IN Akhhhkilhkh.DEFECTIVEMATERIALANDSEVEREEROSIONh HIT.............. 14 - MF6............... R340, R00" DELL INT / FLOW CONTROL DIV MFS MODEL NUMBER. 3626 EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE., EICESSIVE VIBRATION. HIT.............. 20 MF6............... R340, PDCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUM2ER.. HERMAVALVE EN66............. 2 EN66U............. IN EN6A.............. F .CAUSE OF FAILURE.. THE VALVE INTERNALS WERE WDRN. HIT.............. 21 MF6............... R340, R00WELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER., F-SIN - EN66............. 00002

ENS 5U............. IN ENSA.............. F CAUSE OF FAILURE., IV.'ESil5 T!MS REVEALED OLD VA'.VE PACh1N5 WAS DRIED OUT AND VERY SilFF. HCWEVER WB FACCNS WAS FE'0VE.' VA'.VE AIAINWITHSTOODEFFORTSTOEECLCSED. HIT 0.............. 22 MF5............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 M00EL r.'MEER., F-SIN . EN55............. 00002 EN55U............. IN EN5A..............{F!NTENAEEPERSONNELCUTAWAYTHEVALVEB3NETANDD s CAUSEOFFAILURE., Hlf.............. 23 .MF5............... R340. R3CKWELL INT / FLOW CONTROL DIV MF5 M00EL NUMBER., 848Y EN55............. 2 EN55U............. IN-EN5A.............. F CAUSE OF FAILURE.. DISASSEMBLY OF VALVE FOUND A LAR5E AM3UNT OF SLUD5E BACKED UP IN THE LINE AND IN THE VALVE. FOUND THE VAL STEM FROIEN AND FOUND SEATINE SURFACE WITH A FEW PITS. SUSFECT NORMAL WEAROUT OF VALVE FACKING AND SEATIN5 SURFACE. HIT.............. 24 MF50.............. -R340,ROCKWELLINT/FLOWCONTROLDIV PIE MODEL NUMBER., 843Y EN55............. 2 EN55U............. IN -ENSA..............-F 8A95E OF FAILURE., FOUND THAT DUE TO NORMAL WEAR, VALVE HAD EE5UN TO LEAK, ALSD VALVE HAD EXCESSIVE SLU?5E ON STEAM EENERATOR SIDt. Hlf.............. 25 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF5 MODEL NUMBER., 3626F316 EN55............. 2 ENS 5U............. IN CN5A.............. F EAUSE OF FAILURE., CAUSE: ERMAL WEAR RESULTED IN LEAKAGE. Hlfc.............. ?! - MF5............... R340. ROCKWELL INT / FLOW CONTROL sIV MI5 MODEL NUMEER., 3626F316 EN55............. 2 EN55U............. IN .EN5A.............. F --m CAUSEOFFAILURE.. INVEST 154T10N FOUND THAT REMOVINS SOME OF THE VALVE PACKING WOULD NOT BE SATISFACTORY PACKIh5 MD ERN AV JAS CAUSE OF T15HThESS IN VALVE. J HIT.............. 27 MF5............... R340, ROCFWELL INTI FLOW CONTR]L DIV MF5 M00EL NUM!ER. 3626F316 EN55............. 2 ENS 50............. IN

.EN5A.............. F. CAUSE OF FAILURE., k'EATEJT OF PA31Ni FOR VALVE. JHlio.............. 25 Pf60..............- !!40,FXKWELL'INTIFLOWCONTROLDIV Pf6 MODEL N.t!E!. 3626F316 ~ENi5............. 2 . EN69)............. IN -ENSA.............. F CAUSE OF FAILURE. F030 VALVE PACKIN5 HAD WORN DUT. .MIT0.............. 30 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6MODELNUMfER...F-STN EN56............. 2-EN669............. IN EN6A.............. F CAUSEOFFAILURE..fAEN0RMALSTRESS.l HIT.............. 31 E 6............... R340, ROCKWELL INT / FLOW CONTROL DIV E 6 MODEL NUMBER., F-STN EN66............. 2 EN660............. IN . EN5A.............. F q CAUSEOFFAILUPE.. N6SISOFTHEFAILUREHASINDICATEDASTRESSCON:ENTRATIONOCCURSATTHESTEM-DISCC00ECT VALVEISBACKSEATEDANDTHESYSTEM15HEATEDUP. ) HIT.............. 32 ,MFS............... R340, ROCKWELL INT / FLOW CONTROL DIV - MFE MODEL NUMBER., F-SIN EN65............. 2 EN66U............. IN EN6A.............. F 1 CAUSEOFFAILURE.."TE!DESIGNOFTHESTEMANDDISCLEADTOAHIGHAREA0FSTRESSE.ETWEENTHESIEMANDTHEDISCACTERTHEVALVE15j JCKSEATEDCOLDANDTHESYSTEMISHEATEDUP. J Hli.............. 33 MF6............... R340. ROCFWELL INTI FLOW CONTROL DIV MF6 MODEL NUP.SER.. F-STN EN65............. 2 ENGEU............ 14 ENGA.............. L CAUSE OF FAILURE.. ANALYSIS OF THE FAILUPE HAS INDICATED A STRESS CCNCEN IS EA:XSEATED COLD AND THE SYSTEM 15 HEATED CP, . Hli............... - 34 MFS............... R340, ROCKWELL INTI FLOW CONTROL DIV MFS M0tEL NUMEER. 3624F316J ~EN55.............. 2 ENS 5V............. IN EN5A.............. F CAUSE OF FAILURE., THE FAILURE FESULTED FR ?. NORMAL WEAR A t A51N5 0F THE PACK!Ni MATERIAL.

6 HIT.............. 35 MF5.............. 234). ECCKWELL INT / FL3 CONTR0L DIV P!G MODEL N'22ER.. L 3624F316J EN55............. 2 EN55V............. IN ENSA.............. F CA95E OF FAILURE.. THE CAUSE OF THE FAILURE WAS A FACKINE LEAK FF09 REACTOR COOLANT LOUP 'A' CULD LES LOOF STUP VALVE EY? ASS LI ISOLATIUNVALVE2-RC-6.IFEVALVEHADBEENPREVIOUSLYREFAIREDCNTHEFOLLOWINGWGFKCE0ERS:012!2(5-3-85)

020!69(5-1-85)iAND020712(4-21-55).

Hlf.............. 36 - MF5............... R340, ROCKWELL INTI FLOW CCNTROL DIV . MF5 M0:EL NUMBER., 3624F3161 EN55............. 2 EN55U............. IN EN64.............. F CAUSE OF FAILURE., THE CAUSE OF THE FAILVRE WAS A PACKIN5 LEAK FROM THE ISOLATION VALVE 2-R -6. THIS VALVE HAD EEEN F:E',10 5LY INJECTEDWITHAFURMANITECOMPCUN?ONWORKORtER027513(7-26-85). REFERENCE FAILURE REPORT CTii 1500VERY DATEOF850725. HIT.............. 37 MF5............... R340, ROCKWELL INTI FLOW CONTROL DIV MF5 MODEL NUMBER. 3624F316J EN55............. 2 EN559............. IN ENiA.............. F CAUSE OF FAILURE.. THE FAILURE IS THE RESULT OF Y d AL_ASINi OF THE PACKIN5 MATERIAL, THE VALVE HAS EEEN TEMPORARILY FE:AliEDCN TWOOCCASIONSWITHALEAKSEAllNiMATERIAL,BUTONBOTHOCCASIONSThEREFAIRWOULDNOTHOLDDUEI;*-E CONDITIONOFTHEVALVE. - HIT.............. 36 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV Pf6 PODEL NUM!ER. 3624F316J EN55............. 2 EN55V............. IN .h hE F ilhkhl. HE FAILURE FESULIED FR0 Q CFMAL WEAR AND A5ING 0F THE PACKING Hii.............. 39 MF5............... R340, ROCKWELL INTI FLOW CONTROL DIV - MF6 M00EL NUMSER. 3624F316J EN35............. 2 EN55U............. IN d'hEF ilhkkll HE FAILURE RESULTED FRQ1 NORMAL WEAR AND A51N5 0F THE PACFING STERIAL. HIT.............. 40 MF5............... R340, ROCKWELL INTI FLOW CONTROL DIV Pf6 MODEL NUM!ER. 3624F316J EN55............. 2 EN55V............. IN ENSA.............. F CAUSE OF FAIL'SE., THE FAILUPE WAS THE RESULT OF N2AL WEAR / A51% 7 THE FACKING MTERIAL,

' HIf.............. 41 MF6............... R340. ROUWELL INT! FLOW CONTROL DIV ' ' MF5 MODEL EM!ER. 3624F3161 EN55............. 2 'EN55V............. IN EN6A.............. F CAUSE OF FA! LURE. Um2WN. THE FAILURE IS TH005si TO 2E THE RESULT OF A!NCRMAL WEAR 0F THE VALVE INTERNALS. HIT.'............. 42 MF6............... R340. ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NJM2ER. 3624F316J ENS 6............. 2 EN66U.............-IN ' EN6A.............. F CAUSE OF FA! LURE., THE EIACT CAUSE OF THE FAILURE IS UNKNOWN. THE FA!LUE IS THOUGHT TO BE THE RESULT OF AEN0! MAL WEAR OF THE VALVEINTERNALS. H!T.............. 43 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER., 3624F316J EN55............. 2 EN66U............. IN EN6A..............M9ER HAS PREVIOUSLY IDENTIFIED STEM CRACKING AS A D F s CAUSEOFFAILURE.. BAttSEATING W/ HAMMER KNOCKER IS SUSPECTED AS CONTRIBUTING FACTOR '. HII.............. 44 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMEER. 3624F316J EN55............. 2 EN65U............. IN EN6A.............. F CAUSEOFFAILURE.,rPXEFACTURERHASPREVIOUSLYIDENTIFIDSTEMCRACKINGASADESIGNDEFICIENCY.ALSD0 jBACKSEATINGW/HAMMERKNOCKERISSUSPECTEDASCONTRIBUTinsFACTOR. J Hli.............. 45 MF6............... R340. ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL EMSER., 3624F316J EN55............. 2 EN55U............. IN EN6A.............. F CAUSE OF FAILURE., DAMAGED HIT.............. 46 MF6............... R340, FOCKWELL INTI FLOW CONTROL DIV Pf6 MODEL NMEER. 3624F316J ENG6............. 2 EN66U............. IN EN5A.............. F CAUSE OF FAILUFE., DEFECTIVE PACKING. Hli.............. 47 MF5............... A340 FDCKWELL INT / FLOW CONTR3L DIV

m -RF6 MO El NUMIER. 3624F3161- -EN56............. 2- 'EN660............ 14 M EhSA.............. CAUSE OF FA!LVRE., MAWFACTU!ER HAS FPEVIOUSLY IDENTIFIED STEM CFACKING AS A DES 15N DEFICIENCY, ALSO 0FERATIC9L METCD OF !AChSEATINE W/ HAMMER MXtER IS SUSFECTED AS CONTRI!?IIN5 FACTOR, -) HIT.............. 48 MF6............... R340, ROCFWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER. 3624F316J EN66............. 2 EN6FJ............. IN ENGA F ~ CAUSEOFFkib!2 .h_ Hli.............. 49 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER. 3624F316J EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE.. DAMAGED Hli.............. 50 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMEER., 3624F316J EN66............. 2 EN6PJ............. IN ENGA.............. ~~ CAUSEOFFAILURE.,,FVALVEPLUGSEFARATEDFR]dSTEMANDLODGEDINHOTLE6MANIFOLDLINER s JACKSEAT FORCE APPLIED. Hli.............. 51 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUM2ER.. 3624F.16J EN66............. 2 EN660............. IN EN6A.............. F - - -~ - -- -- CAUSE OF FAILURE.,"MAWFACTURER HAS PREVIOUSLY IDENTIFIED STEM CRACKING AS A DESIGN DEFICIENCY. ALSO 0FERAT10NAL METHOD OF EACKSEATINGW/HAMMERkN]CKERISSUSFECTEDASCONTRIBUTINGFACTOR, - H1T.............. 52 MF6............... R340. ROCKWELL INTI FLOW CONTROL DIV MF6 M0CEL NUMBER., 3624F316J EN56............. 2 EN66V............. IN ENGA.............. F (AUSEOFFAILURE.7MANUFACTURERHASPREVIOVSLYIDENTIFIEDSTEMCRACKINGASADESIGNDE:lCIENCY,ALSDGPERATICVLMETHOD0F BAChSEATING W/lW'IER KNMELIS SUSFECTED AS CONTR!!UTING FACTOR. s Hli.............. 53 MF6............... R340, ROCFWELL INT / FLOW CONTROL DIV MF6 MOCEL EMiER. 3624F316! EN55............. 2

EN55V............. IN EN5 A.............. ' F GU5E OF FAILUEE.. M P.TUFER RA3 FREV10'JSLV IDENTIFIED SIEM C!a31N5 AS A DESIGN DEFICIENCY, ALSD C?EFATICV L PET d; 0F : JACti!AilNG W/HAMER FNBER IS SUSFECTED AS CCNTFISUTINi FACT 09. _s Hi?.............. 54 MF5............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 G EL N;.9sER., 3624F3161 EN35............. 2 ENS 5V............. IN EN5A.............. CAUSE 0F FAILURE.. MANUFACTURER HAS PFEVIOUSLY IDENTIFIED STEM CRA MING AS A DESIGN DEFICIENCY, ALSO 0FERAT10NAL METHOD OF BACKSEATINS W/HAMER KNO3ER IS SjlSJECTED AS CCNTP15VilN5 FACTOR. j Hli.............. 55~ MF50.............. R340,ROCKWELLINT/FLOWCCNTROLDIV MF6 MODEL NUMBER. 3624F3161 ENE5.............. 2 ENE9J............. IN EN5A.............. L M CAUSEOFFAILURE..'MANUFACTUPERHASPREVIOUSLYIDENTIFIDSTEMCRACKINGASADESIGNDEFICIENCY.' dQSEATIN5 W/HAMER KNOCKER IS3S!EGED_ASl0E!]EHUlif. ACTOR. HIT.............. 56 MF50.............. R340,PDCKWELLINilFLOWCONTROLDIV MFE MODEL NT!ER., 3624F316J ENSS............. 2 EN65U............. IN EN5A.............. F CAUSEOFFAILURE.,L3NOWN Hli.............. 57 MF5............... R340, ROCKWELL INTI FLOW CCNTROL DIV MF6MODELNUMBER.,-3624F316J EN55............. 2 ENGEU............. IN EN5A.............. DUSE CF FAILURE.. ROCFWELL DESIGN PF0SLEM. ALSO, EICESS 2AMSEAT FORCE APPLIED.) Hlf.............. 55 MF6............... R340, PO MWELL INil FLOW CONTROL DIV MFS MOCEL NUPEER., 3624F316 GNS6............. 2 EN59)............. IN EN54.............. F____ c._ CAUSE OF FAILURE.. [STRESSj. Hli.............. 59 MF6............... R340, PDCKWELL INTI FLOW CONTROL DIV MF5 MODEL NUMSER. 3624F316 CN55............. 2 EN55V............. IN EN5A.............. F CA9SE OF FAILURE.. NATURAL END OF LIFE OF PA ulNG.

k - HIT.............. 60 MF5............... F340, RSC WELL INT / FLCW C0NTROL DIV MF5 M3EL NUMBER., 3624M EN55.............. 2 Eh55V............. IN EN5A.............. F ' CAUSE OF FAILVRE., VALVE STEM WAS DRY CAUSIN5 THE 0?EN TCREE SWITCH TO OPEN AND SHUT OFF VA' E AT MID FOSITION. J HIT.............. 61 MF5............... R340, RDCKWELL INT / FLOW C0NTROL DIV MF5 MODEL NUMEER., 868Y EN55............. 2 EN55V............. IN EN5A.............. F CAUSE OF FAILURE.. RUST FARTICLES FROM STATION AIR SYSTEM WERE FOUND ON VALVE INTERNALS AND SEATING SUFJACES. HIT.............. 62 MF5............... R340, ROCKWELL INT / FLOW CONTROL DIV MF5 MODEL NUMEER. 865Y EN55............. 2 EN55V............. IN ENGA.............. F CAUSE OF FAILURE., RUST PARTICLES FROM STATION AIR SYSTEM WERE FOUND ON VALVE INTERNALS AND SEATIN5 SURFACE. HIT.............. 63 MF5............... R340. ROCKWELL INT / FLOW CONTROL DIV PIE MODEL NUMEER. 3624F316J EN55............. 2.0 EN55U............. IN ENGA.............. F CAL'SE OF FAILURE.'. THE FAILURE RESULTED FROM NORMAL WEAR AND ASING 0F THE VALVE PACKING. HIT.............. 64 MF5............... R340, ROCKWELL INTI FLOW CONTROL DIV MF5 MC0EL NUM!ER. 3624F316J EN55............. 2.0 EN55U............. IN EN5A.............._F CAUSE OF FAILURE.. INVESTIGATION INDICATED TO REDUCE FACK!N5 LEAKAGE THE.yALVE WAS PLACED ON ITS EACK SEAT WITH EXC WITH THE VALVE EACKSEATED HOT AND THE UNIT C00LIh5 DM TENSILE FORCES CAUSED STRESS' GACKlW. ISIS CA!'Si [DISCSE.FARATIONFROMITSSTER,PADIOGRAPHICEIAMSWEREFERFORMEDONTHEVALVE. j HIT.............. 65 MF5....'........... R343. F]D WELL INT / FLOW CONTROL DIV MFS MODEL NUM3ER., DW5. N0. 0-464532 EN55............. I EN55U............. IN EN5A............. @ CAUSEOFFAILURE., ANINVESTI5ATIONFEVEALEDTHATTHEVALVESTEMHADSE8ARATEDFROMTHEDISCINAMANNEPWHICHFREVENTEDVALVE 1 4-555C FROM FULLY OPENIN5. REFEATED DVERICRiUIN5 IN E O 5EATIN5 (C"!!hED WITH ThE h0TCH EFFECT OF TdE STEM \\ FEAD ( THERE IS A SFAR? SHOULDER AT THE HEAD OF THE STEM WHICH YIELDS A HI5H STRESS C0'i:ENTRATION FACIOR 1 IS, _.TfEESTJCBA!LECAUSE, J

. HI T.............. 6 6. MF5............... R340. ROCH ELL INTI FLCW C0%iR]L DIV 'MF5 M2 DEL NUMEER.. [W5.A:D-3!60551 EN55............. 2 'Eh55V............, 1N EN5A.............. L _... _ ---r-3 CAUSEOFFAILURE..tCAV5E UMCW1. AEGMAL STPESS MAY HAVE CCNTRIBUTED Hli.............. 67 - MF5............... R340, FOCKWELL INTI FLOW CCNTEDL DIV MF5MODELNUM!ER.,'F15.NO.15104T EN55............. 2 ENi9),............ IN Eh5A.............. F - CALSE OF FAILURE.. THE VALVE INTERNALS WEFE DIRTY A C SCRATCHED DUE TD EXPECTED WEAR.. Hli.............. 65 MF5............... R340, ROCKWELL INT / FLOW CONTEDL DIV MF5 MODEL NUMBER.. F15. NO. 15104T EN55............. 2 EN5EU.............'IN EN5A.............. F CAUSE OF FAILURE.. THE VALVE INTERNALS WERE DIRTY AND SCRATCHED DUE TO EIPECTED WEAR. Hli.............. 69 MF5............... R340, ROCKWELL INTL FLOW CONTROL DIV -MFG M00EL NUM5ER. 3624-F316J EN55............. 2 EN55V............. IN E45A............... F ' (AUSE OF FAILURE.. WORN PAChlN5. HIT.............. 70 MF5............... R310, ROCKWELL INT / FLOW CONTROL DIV MF5 MODEL W MBER.. 3624-F316J EN55............. 2 EN55U............. IN EN5A.............. F CAUSE OF FAILURE., NATURAL END OF LIFE OF PACKING. HIT.............. 71 MF5............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMEER. 3624-F316J EN55............. 2 Eh559............. IN EN5A.............. F CAUSE OF FAILURE., PACKING FAILED. Hli.............. 72 MF5............... R340, ROCKWELL INT / FLOW CCNTROL-DIV MFi MODEL EMEER. 3!24-F316J EN55............. 2 .EN550............. IN EN5A.............. F

=_ CAUSE OF FAILUBE., W9 N FA 21N5. Hli.............. 73 MF6............... R340 R3CKWELL INT / FLOW CCNTRCL DIV MF6 C EL W iER., 3624-F316J EN66............. 2 Eh56U............. lN-- EN6A.............. F-CAVEE OF FAILURE., ERCKEN VALVE FACKING FOLLOWER, HIT.............. 74 RF6............... R340 RONELL INTI FLOW CONTROL DIV MF6 N00EL NUMBER., 3624-F316J EN66............. 2 EN66V............. IN EN6A.............. F ' CAUSE OF FAILURE., NATI1AL END OF PACKING LIFE. HIT.............. 75 F 6............... R340, ROCKWELL lNT/ FLOW CONTROL DIV MF6 MODEL NUMBER. 3624-F316J .EN66............. 2-EN66U............. IN EN6A.............. F CAUSE OF FAILURE.. NATURAL END OF PACKING LIFE-BACKEN 6 LAND FOLLOWER. HIT.............. 76 MF6............... R340,' ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER. 3624-F316J EN66.............. 2 ENi60............. IN EN6A.............. F CAUSE OF FAILURE..- CH-184'S PACKIN5 FOLLOWER ( 6 LAND FLANGE 12R0KE IN HALF AND THE PACKING WAS BLOWN O UT. Hli.............. 77 MF6...............' R340, POCKWELL INTL FLOW CONTROL DIV MF6 MODEL NUMBER. 3624-F3161 EN66............. 2 Eh569............. IN ENGA.............. CAUSE OF FAILURE.. THESE TYPES OF VALVES HAVE EEEN EIFERIENCIN5 SIE.9 SEPARATION 111i.............. 78 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL N2EER. 3624-F316J EN66............. 2 EN65U............. IN EN5A.............. F CAUSE OF FAILURE., OLD AND WORN FACKING. HIT.............. 79 MF6............... R340. RO N ELL INT / FLC2 (CNTROL DIV MF6 P00EL N 2!ER. 3624-F3!61 .EN56............. 2

ENi60............. IN EN6A.............. F CAUSE OF FAILViE. G 4 FACKlh6. HIT.............. 80 MF6............... F34. FOCvWELL INT / FLOW CONTROL CIV MF6 MODEL NUMBER. 2-T52 EN66............. 2 EN66V.............-1N EN6A.............. F CAUSE OF FAILURE., THE LEAMEE WAS DUE TO NORMAL WEAR OF THE PACKIN6 MATERIAL, Hli.............. 81 MF6............... R340. PQCKWELL INTI FLOW CONTROL DIV MF6 MODEL N'2EER. 2-158 EN66............. 2 EN66U............. IN EN6A............... F CAUSE OF FAILURE., CUE TO NORMAL WEAR OF PACHIN5. Hli.............. 82 MF6............... P340. FOCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER., 2-T58 EN66............. 2 EN66U............. IN EN5A.............. F CAUSE OF FAILURE., WEAR OF THE PACKIN6. HIT.............. 83 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUM2ER., 2-158 EN66............. 2 EN66U............. IN EN5A.............. F CAUEE OF FAILURE., OUE TO ERMAL WEAR OF PACKING. HIT.............. 84 Nf6............... R340, P0CKWELL INT / FLOW CONTROL DIV MF6 MODEL N'JMBER. 2-T58 EN66............. 2 EM66U............. IN EN6A.............. F CAU5E GF FAILURE., EVE iG EEMAL WEAR OF PACKIN6. Hli.............. 85 MF6............... R340. FOCKWELL INT / FLOW CCNTROL DIV MF6 EDEL N'2EER. 2-158 EN66............. 2 EN56U............. IN EN5A.............. F CAUSE OF FAILURE., WEAR OF THE PACKIN6. Hli.............. 86 MF6............... F30. P0GWELL INT / FLOW C0kiROL OIV

i P!5M:CEL NUMiEP. 2-15! EN56............. 2 EN55U............. IN EN5A.............. F-CAVSE OF FAILUFE. K E TO N:PMA' WEAR OF FACKIN5. HIT.............. 87 MF6.'.............. R340, PDCKWELL INT / FLOW CONTROL DIV MFi MODEL NUMEER.. 2-T58 EN65............. 2 ENE5U............. IN-EN5A.............. F . CAUSE OF FAILURE.. THE PACKINS WAS WORN DUE TO NORMAL WEAR. Hli.............. 88 MF5............... R340, ROCKWELL INTI FLOW CONTROL DIV Pf6 G EL NUM!ER. 3624F316 EN55............. 2 . ENDl............. IN. ' EM6A.............. F CAUSE OF FAILURE.. NORMAL WEAR. HIT.............. 89 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL N"MEER.. 3624F316 EM65............. 2 EN56U..............IN EN5A.............. F CAUSE OF FAILURE., NORMAL WEAR OF PACKING, HIT.............. 90 ~ F6............... R340. POCKWELL INTI FLOW CONTROL DIV M MFS MODEL NUMBER. 3624F316 EN66............. 2 EN65V............. IN EN5A.............. F CAUSE OF FAILURE., CUE TO NOR9AL WEAR OF FACKING. Hli.............. 91 MF6............... R340, FOCKWELL INTI FLOW CONTROL DIV MF5 MODEL NL'MBER., 3624F316 EN55............. 2

EN55V.............

IN EN5A.............. F. CAUSE OF FAILORE.. CAUSE WAS NORMAL WEAR OF THE FACKING, HIT.............. 92 MF5............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6MDEL NUMEER., 3624F316 EN56............. 2

EN55U.............

IN EN5A.............. F CA"SE OF FAILURE.. DL'E TO NC9A'. WEAR OF PACKING.

HIT.............. 93 MF6............... R340. ROCKWELL INT / FLOW CONTFDL DIV MF6 G EL hSMEER., 3624F316 EN66............. 2 EN66U............. IN ENGA.............. F CAlfSE OF FAILVRE.. THE CAUSE OF FAILURE WAS DUE TO NCEMAL WEAR OF PACKING, Hli.............. 94 MF6............... R340. ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. 3624F316 EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE.. THE CAUSE OF FAILURE WAS DUE TO N3RMAL WEAR OF THE PACKING. -Hli.............. 95 MF6............... R340. ROCKWELL INT / FLOW CONTROL DIV MFS MODEL NUMBER. 3624F316 EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE., AGE RELATED DEGRADAi!0N DEVELOPED PACKING LEAK IN COLD LES RESISTANCE TEMPEPATURE DETECTOR BYPASS LINE ISOLATIONVALVE2-RC-85. Hli.............. 96 MF6............... R340. ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER., 3624F316 EN66............. 2 EN66V............. IN ENEA.............. F CAUSE OF FAILURE., DUE TO NORMAL A6ING OF PACKING. HIT.............. 97 MF6............... R340 ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NVMEER. 3624F316 EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE., DUE TO WEAR AND FAT 16UE. Hli.............. 98 MF6............... R340. ROCKWE'.L INTI FLOW CONTROL DIV MF6MODELNUMBER.. 0-464532 EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE., NORMAL WEAR OF PACKING, Hli.............. 99 MF6............... R340. ROCKWELL INTI FLOW CONTROL DIV MF6 MOCEL NUMEER.. D-464532 ENS 5............. 2 EN66U............. IN

EN6A.............. F' CAUSE OF FAILUPE.. WE TO WEAR. HIT.............. 100' MF6............... R340, RXEWELL INT / FLOW CONTROL DIV MF6MODELk?.!ER.. 0-464532-EN56............. 2 EN66U............. IN ENS 4.............. F CAUSE OF FAILURE.. LOOSE PACKINS 6LA C AS A RESULT 0F NOFMAL COM?CNENT WEAR. HIT....'.......... 101 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6M:DELNUMEER., 0-464532 ENE6.............. 2 EN66U............. IN EN6A.............. F CAUSL OF FAILURE.. DUE TO WEAR. HIT.............. 102 MF6............... R340, R0: KWELL INTI FLOW CONTPOL DIV MF6 MODEL NUMBER.. D-464532 -EN66............. 2 EN660............. IN EN6A.............. F CAUSE OF FAILURE.. THE CAUSE OF THE FAILURE WAS DUE TO IMPROPER PREVIOUS REPAIR. HIT.............. 103 MF6...............-R340,ROCKWELLINT/FLOWCONTROLDIV MF6MODELNUMBER.. 0-464532 EN66..............=2 EN66U.............-IN ENiA.............. F CAUSE OF FAILURE., NORMAL WEAR. HIT.............. 104 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6MODELNLMEER.. 0-464532 ENi5............. 2 EN669............. IN EN64.............. F CAUSE OF FAILURE., N 3 MAL WEAR OF PACKING. HIT.............. 107 MF6............... R340. RO M ELL INT / FLOW CONTROL DIV RF6 MODEL NLMEER. 2-T55 EN66............. 2 EN66V............. IN ENGA.............. F.- q (AUSE OF FAILUFE., FEITiiER INVESTIGATION REVEALED THE LEAK WAS FROM A FAULTY WELD EETWEEN T NIFPLE.CCRRDSICNFROMTHEINSIDE. /

HIT.............. 110 MF6............... R340,' ROS WE;L INTI FLOW CCNTROL DIV MFS M0(El N1.M ER. 3624-F316J ENG6............. 2 EN66U............. IN EN64.............. F CA95E OF FAILURE., WORN OUT PACFING. HIT.............. 111 MF6............... R340. ROCKWELL INT / FLOW CCNTROL DIV MF6 MODEL N'.'MBER., 3624-F3161 EN66............. 2 EN66U............. IN EN64.............. F CAUSE OF FAILURE., AGING. HIT.............. 112 ' MF6............... R340. PDCKWELL INT / FLOW CONTROL 0:V MFS MODEL NUMBER.. D-70516 EN66............. 2 EN66U............. IN -EN64.............. F CAUSE OF FAILURE., NORMAL PACKING WEAR. Hli............... !!3 MF6............... R340. 10CKWELL-INTI FLOW CONTROL DIV MF6 MODEL NUMEER. D-70816 EN66............. 2 - ENG6V............. IN EN6A.............. F CAUSE OF FAILURE., VALVE PACKING WAS LOOSE. HIT............... !!4 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6MODELNUMEER.. 0-70816 EN66............. 2 EN66V............. IN EN6A.............. F CAUSE OF FAILURE., VALVE PACKING WAS WORN DUE TO NORMAL USE. Hli............... !!! MF6............... R340. ROCEWELL INil FLOW CONTROL DIV MF6M00ELNUMBER.. 0-70816 EN66............. 2 EN660............. IN I ENGA.............. F CAUSE OF FAILURE., NCPMAL PACKIN5 WEAR, i HIT............... !!6 l MF6............... R340, ROCKWELL INTI FLOW C3 TROL DIV MFSMODELNUMBER., 0-70816 EM66............. 2 l ENE6V............. IN EN64.............. F l l

CAVSE OF FAILURE., NORMAL PACKING WEAR. HIT.............. 117 MF6............... R340, ROCFWELL INT / FLOW CONTROL DIV MF6 MODEL m !ER.. D-70816 EN66............. 2 EN66V............. IN-EN6A.............. F CAUSE OF FAILURE.. NORMAL PACKING WEAR HIT0.............. 118 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER.. D-70816 EE 5.~............. ~ 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE.. VALVE PACKING WAS WORN, HIT.............. 119 F6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER.. NONE EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE. NCRMAL WEAR. HIT.............. 120 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMEER., D-464532 EN66............. 2 EN66U............. IN EH A.............. A ~ ~ ~ - ~ ~ - CAUSEOFFAILURE..IITISBELIEVEDTHATTHESTEM/DISCINDICATIONSOFSEPARAT10NS/CRACKSINTHEROCKWELL-EDWARDSGLO2EVALVES QNSTALLEDINTHERIDBYPASSMANIFOLDARERELATEDTOEXCESSIVEBACKSEATINGFORCES. Hli.............. 121 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6MODELNUMBER., 0-464532 ENG6............. 2 EN66V............. IN EN6A............../ --= y CAUSEOFFAILURE..IITIS8EllEVE8THATTHESTEM/DISCINDICATICNSOFSEPARATIONS/CKACKSINTHEROCKWELL-EDWARDSGLOBEV JSTALLED IN THE RTD BfPASS MANIF 0LD ARE RELATED 10 EICESSivE EACitSEATING FO j HIT.............. 122 MFS............... R340, ROCKWELL INil FLOW CONTROL DIV MF6 MODEL NUMBER.. D-464532 EN66............. 2 EN66U............. IN A' E 5h FAUN..' T IS BbEVED THAT THE STEM / DISC INDICATICNS OF SEPARATIONS IINSTALLEDINTHERTDBYPASSMANIFOLDAREFELATEDTOEXCESSIVEBACK$EATINGFORCES. Hli.............. 123

MF6............... R340, ROCKWELL INT / FLOW CONTE 0L DIV MFS M00EL NUMEER., D-464532 ENSS............. 2 ENS 6V............. IN ENSA.............. F CAUSE Of FAILURE.. TT IS BELIEVED THAT THE STEM / DISC INDICATIONS OF SEPAFATIONS / CRACKS IN THE ROCKWELL-EDWARDS GLOS INSTALLEDINTHERIDBfPASSMAN!FDLDAPEPELATEDTOEICES$1VEEACKSEATINGFORCES. Hli.............. 124 MF6............... R340, ROCKWELL INT / FLOW (CNTROL DIV MF6 MODEL NUMEER. D-464532 ENS 6............. 2 EN66U............. IN EN64..............F . CAUSE OF FAILURE.. TIS BELIEVED THAT THE STEM / DISC INDICATIONS OF SEPARATIONS / CRACP.S IN INSTALLEDINTHERTOBYPA5SMANIFOLDARERELATEDTOEXCESSIVEBACKSEATINGFORCES. 3 HIT.............. 125 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIY MF6 MODEL NUMBER. D-464532 EN66............. 2 EN66U............. IN ENGA.............. F CAUSE OF FAILURE.."Il 15 EEUEVED THAT THE STEM / DISC INDICATIONS OF SEPARATIONS / CRACKS IN THE ROCKWELL-EDWAR J _ INSTALLED IN THE RID BYPASS MANIFOLD AREELAJEMBE51VE EACKSEATING FORCES Hli.............. 126 MF6............... R340, ROCKWELL INT / FLOW CCNTROL DIV MF6M0DELNLMBER., 0-464532 EN66............. 2 EN6W............. IN EEA.............. F CAUSEOFFAILURE.,LITISBELIEVEDTHATTHESTEM/DISCINDICATIONSOFSEPAFATIONS/C INSTALLED IN THE RID BYPASS MANIFOLDEJELATED TO EICHSIVE BACKSEATING FORCES. HIT.............. 12T MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MFi MODEL NUMEER.. D-464532 EN66............. 2 EN66U............. IN ENGA.............. F CAVSEOFFAILURE., T IS BEllEVED THAT THE STEM / DISC INDICATIONS 0F SEPARATIONS / CRACKS IN THE E0CKWELL-EDWARDS GLCEE VALVESi J INSTALLED IN THE RID BYPASS MANIFOLD ARE FELATED TO EICESSlVEIACMEJJB6 FORA HIT.............. 128 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. D-464532 EN66............. 2 EN66U............ 14 --- - -.. H ENGA.............. F = CAUSE OF FAILURE. 1 IT IS BEllEVED THAT THE STEM / DISC INDICATIONS OF SEPARATIONS / CRACKS IN THE ROCKWELL-EDWA INSTALLED IN THE RTO BYPASS PANIFOLD AFE RELATED TO EXCESSIVE BACKSEATING FORCES. _ ___ J Hli.............. 129

MF6............... R34h ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUM2ER. D-464532 EN56............. 2 EN66V............. IN EN5A.............. F CAVSE OF FAILURE..t'll IT IS EELIEVED THAT THE STEM / DISC INDICATIONS CF SEPARATIONS / CRACKS IN THE ROCtW lNSTALLEDINTHERIOB1PASSMANIFOLDARERELATEDTOEICESSIVEEACKSEATINGFORCES. m HIT.............. 130 MF6............... R340, P0CKWELL INTI FLOW CONTROL DIV MF6 M00EL NUMBER.. D-464532 EN66............. 2 EN66U............. IN EN5A.............. F 1 CAUSEOFFAILURE.71TISBEllEVEDTHATTHESTEM/DISCINDICATIONSOFSEPARAT10NS/CRACKSINTHEROCKWELL-EDWARDS 6LO!E INSTALLEDINTHERIDBYPASSMANIFOLDAREPELATEDTOEICESSIVEBACKSEATINSFORCES. J HIT.............. 131 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER.. D-464532 EN66............. 2 EN66U............. IN ENGA.............. F CAUSEOFFAILURE.. ITISBELIEVEDTHATTHESTEM/DISCINDICATIONSOFSEPARATIONS/CRACKSINTHEROCKWELLEDWARDS6LOBEVALVES JNSTALLED IN THLtlO BYFASE MAWIF1D APE prt ATED TO EICESSIVE EACKSEATING FORCES. Hli.............. 132 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NVMBER.. D-444532 EN66............. 2 EN66U,............ IN EN6A.............. F CAUSEOFFAILURE., ITISBELIEVEDTHATTHESTEM/DISCINDICATIONSOFSEPARATIONS/CRACKSINTHEROCKWELL-EDWARDS 6LOSEVALVES JNSTALLED IN THE RID BYPASS MANIFOLD ARE RELATED TO EXCESSIVE BACKSEATINS FORCES. j HIT.............. 133 MF6............... R340, ROCEWELL INT / FLOW CONTROL DIV MF6 MODEL NUM9ER.. D-464532 EN66............. 2 EN66U............. IN EN5A...............F CAUSE OF FAILURE ?!T IS BELIEVED THAT TPI STEM / DISC INDICATIONS OF SEPARA!!0NS / CRACKS IN THE ROCKWELL-ENARDS 5LO!E VALV INSTALLEDINTHERIDBYPASSMANIFOLDARERELATEDTOEXCESSIVEBACKSEATINGFORCES. _ __J HIT...g........... 134 MF6............... R340. ROCKWELL INil FLOW CONTROL DIV MF6 MODEL NUMEER. D-464532 EN66............. 2 EN660.............'IN EN6A.............. F ~ (AUSE OF FAILURE.. IT IS EEllEVED THAT THE STEM / DISC INDICATIONS OF SEPARATIONS / CPACKS IN THE ROCK _IlilALLED IN THE RID BYPASS MANIELDJRE FELAIEUO_EICESSIVE BACKSEATINS FORCES. J HIT.............. 135

MF6............... R340. ROCKWELL INTI FLOW CONTROL DIV MF6 M]CEL NVMEER., D-464532 EN66............. 2 EN66V............. IN F ENSA.............._liISEELIEVEDTHATTHESTEM/DISCINDICATICNS0FSEFAFAT CAUSEOFFAILURE.. l LINSTALLEDINTHERTDBYFASSMANIFOLDARERELATEDTOEICESSIVEEACKSEATINSFORCES. j Hli.............. 136 MF6............... R340 ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMEER.. D-464532 EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE., li IS BELIEVED THAT THE STEM / DISC INDICATIONS OF SEPARATIONS / CRACKS IN THE P INSTALLEDINTHERfDBYFASSMANIF0LDARERELATEDTOEXCESSIVEBACKSEATINGFORCES. J HIT.............. 137 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER.. D-464532 EN66............. 2 EN66V............. IN EN6A.............. F CAUSEOFFAILURE..~li15BELIEVEDTHATTHESTEM/DISCINDICATIONSOFSEPARAT10NS/CRACKSINTHEROCKWELL-E0WAUSELO!EVALVES _INSTALLEDINTHERIDBYFASSMANIFOLDAREPELATEDTOEICESSIVEEACKSEATINGFORCES. Hli.............. 138 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV PJG M3 DEL NUMBER., 3624-F316-J EN66............. 2 EN660............. IN EN5A.............. F EAUSE OF FAILURE., CAUSE ATTRIBUTED TO NORMAL WEAR. Hli.............. 139 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MFS MODEL NUMBER.. F16.3624F316 EN66............. 2 EN660............. IN EN6A.............. F CAUSE OF FAILURE., AGE. Hli.............. 140 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 M00EL NUM!ER., WAPD-2-T58 EN66............. 2 EN66U............. IN EN64.............. F CAUSE OF FAILURE. AGE AND DETERIORATION OF PACKIN5. Hli.............. 141 MF6............... R340, ROCKWELL INT / FLOW CONTRCL DIV ' Pf6 M0 EEL NUMEEi.. F16.ND.3624-F316J EN66............. 2

EN66')............. IN EN6A.............. F CA?!E OF FAILURE., CETERICFATICN OF PACKING. Hli............... !42 MF6............... R340, ROCf'iELL INTI FLCW C0NTROL DIV MF6 M0!EL NUMBER., F16.NO.3624-F3161 E E 6............. 2 EN65U............. IN ENGA.............. F CAUSE OF FAILVRE., CETERIORATION OF THE PACKING MATERIAL. HIT.............. 143 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER. 8481Y EN66............. 2 EN66U............. IN ENGA.............. F CAUSE OF FAILURE. FORE 16N MATERIAL LODGED BETWEEN DISC AND SEAT. HIT.............. 144 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER. 3624MT EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE., EICESS FRICTION BETWEEN PACKING AND STEM. HIT............... t45 Mf6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 E EL NUMBER., 3624MMT EN66............. 2 EN66U............. IN AEbh"hUkhl$fLEAKAGEACROSSTHESEATDUETOSEATAERASIONSANDPOSSIBLYSEAWA Hli.............. 146 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER., 3624MMT EN66............. 2 EN66V............. IN cua e- _ _ _ ~ _. _ _ CAUSE OF FAILURE.,[LEALAiEJ 6REATER THAN TECHNICAL SPECIFICATION LIMITS ) WAS DUE TO CORROSION PRODUCT BU Hli.............. 147 MF6............... R340, ROCtWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER., 3624MMI EN66............. 2 EN66U............. IN ENGA.............. F CAUSE OF FAILURE.. SLOW CYCLE TIME DUE TO INSUFFICIENT VALVE STEM LUERICATION. HIT.............. 145

F 6,.............. R340, ROD WELL INTI FLOW CCNTROL O!V 'MF6 MODEL NUMBER., 3624MMT EM66............. 2 EN66V............. IN EN64.............. F CA"SE OF FAILURE., SLOW CYCLE TIME OVE TO LACK OF VALVE STEM LUERICATION. Hli.............. 149 MF6,.............. R340 ROCKWELL INT / FLCW CONTROL O!V MF6 MODEL NUMBER. 3624F316 EN66............. 2 EN660............. IN EN6A.............. F CAUSE OF FAILURE.. VALVE 565C PACKING LEAKS. Hli.............. 150 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. 3624F316 EN66............. 2 EE6U............. IN E E A.............. F CAUSE OF FAILURE., EXCESSIVE PACKING LEAK. HIT.............. 151 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER., 3624F316 EN66............. 2 EE6U............. IN - EN6A.............. F CAUSE OF FAILURE., PACKING LEAK. HIT.............. 152 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER. 3624F316 EE 6............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE., DUE TO NATURAL END OF LIFE, PACK!NG LEAK DEVELOPED. Hli.............. 153 MF6............... R340 ROCKELL INTI FLOW CONTROL DIV MF6 MCDEL NUMBER. 3624F316 E H6............. 2 E E6U............. IN E EA.............. F CAUSE OF FAILURE. EICESSIVE PACKING LEAK. HIT.............. 154 MF6............... R340, ROCKWELL INTI FLOW CONTROL O!V MF6 MODEL NUMBER., 3624F316 EN66............. 2 l EN66U............. IN ENGA.............. F CAUSE OF FAILURE., EICESSIVE PACKING LEAK. i i

HIT.............. 155 MF6............... R340, E XKWELL INil FLOW (CNTROL DIV MF6 MODEL N'.'M!ER. 3624F316 EE 6............. 2 EN669............. IN EN5A.............. F CAUSE OF FAILURE., DUE TO NATURAL END 0F LIFE, PACKING LEAK DEVELOPED. Hli.............. 15 6 - MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 M0(El N'?,2ER. 3624F316 EN36.............. 2 EN66V............. IN EN6A.............. F CAUSE GF FAILURE., EICESSIVE PACKING LEAK. Hli.............. 157 E 6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MCDEL NUMBER. 3624F316 EE6............. 2 EN660............. IN E EA.............. F CAUSE OF FAILURE., DUE TO NATURAL END OF LIFE, PACKING LEAK DEVELOPED. Hli.............. 158 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL N'JMBER., 3624r316 E E6.............. 2 EN66U............. IN Eh6A.............. F CAUSE OF FAILURE.. EICESSIVE PACKING LEAK. Hli.............. 159 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 M3 DEL NUMBER., 3624F316 EN66............. 2 E E6U............. IN EN6A.............. F CAUSE OF FAILURE. PACKING LEAK. Hli.............. 160 MF6............... R340, PDCKWELL INT / FLOW CONTRCL DIV MF6 MODEL NUMBER. 3624F316 EN66............. 2 EE60............. IN EN6A.............. F CAUSE OF FAILURE.. PACKIE LEAK. Hli.............. 161 MF6............... R340, ROCKWELL INil FLOW CONTPOL DIV MF6 M2 DEL NUMBER., 3624F316 ENi5............. 2 ENiGV............. IN

EN5A.............. F CAUSE OF FA!LUPE.. FACKIN5 LEAK. HIT.............. 162 MF6............... R340. ROCKWELL INT / FLOW CONTR3L DIV MFS M00EL N'JM!ER., 3624F316 EN66............. 2 EN66U............. IN EEA..............F CAUSE OF FAILUPE.. PACKING LEAK. Hli.............. 163 MF6............... R340. ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMEER. 3624F316 EN66............. 2 EN660.............-IN EN6A.............. F. CAUSE OF FAILURE., PACKINS LEAK. Hli.............. 164 MF6............... R340 ROCKWELL lhTI FLOW CCNTROL DIV MF6 MODEL NUMBER., 3624F316 EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE.. PACKIN5 LEAK. Hli.............. 165 MF6............... P340. ROCKWELL INTI FLOW C0NTROL DIV MF6 MODEL N'JMBER. 3624F316 EN66............. 2 EN66U............. IN EN64.............. F CAUSE OF FAILURE.. DUE TO NATURAL END OF LIFE, PACKING LEAK DEVELOPED. HIT.............. 166 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUM!ER., 3624F316 EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE.. DUE TO NATURAL END OF LIFE, PACKING LEAK DE'.' ELOPED. Hli.............. 167 MF6............... R340, R]UWELL INTI FLOW CCNTROL DIV MF6 MODEL Nt.MEER., 3624 EN66............. 2 EN66U............. IN E bh'Fkithkk$. E SEPARATION IS APPA!EN_itL(CED_ elf; ""R: CN TFE C0WECTION JOINT DURING BACK SEAT Hli.............. 165 MFf............... R340. ROCKsELL INTI FLOW CCNTROL DIV MF6 MODEL NUMBER. 3624

EN56............. 2 EN66U............. IN Ad'bh'fki[hikll RATIONISAPPARENTLYCAUSEDBYPRESSUREONTHECONNECTIONJOINTDURIN HIT.............. 169 MF6,.............. R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. 3624 EN66............. 2 EN66U............. IN EN6A.............. F CAUSEOFFAILURE..gSEPARATIONISAPPAFENTLYCAUSEDBYPPESSUPE04TFECChSECTIONJOINTDUR Hli.............. 170 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER., 3624 EN66..............-2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE.~ITHE SEPARATION IS AFFARENTLY CAUSED BY PRCWR M THF CON HIT.............. 171 MF6.............. R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER., 3624 EN66............. 2 EN66U............. IN AUSk bh hkf(hkh $I HE SEPARATION IS APPARENTLY CAUSED BY PRESSURE O Hli.............. 172 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER., 3624 EN66............. 2 EN66U............. IN EN6A..............ITHESEPARATIONISAPPARENTLYCAUSEDBY F CAUSEOFFAILURE.. Hli.............. 173 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MDCEL NUMEER. 3624 EN66............. 2 EN660.,........... IN tMaA..............fHE SEPAGATION IS APPARENTLY CAUSED BY PRESSURE CAUSEOFFAILURE.. HIT.............. 174 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 M00EL NUMBER. 3624 EN66............. 2 EN66U............. IN EN6A..............lTHESEPARATIONISAFPARENTLYCAUSEDBYPRESSUR P CAUSEOFFAILURE.. Hli.............. 175

s MF6...............R340,ROChELLINT/FLOWCCNTRDLDIV ( MF6 MODEL NUMEER.. : 3624 EN66............. 2 EN56U.............'IN EN54..............,F CAUSEOFFAILURE..THESEPARATIONISAPPARENTLYCAUSEDBYPRESSUREON Hii............... iT6 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER. 3624 EN56............. 2 EN66U............. IN EN6A.............. F__ CAUSEOFFAILURE.7THESEPARATIONISAPPARENTLYCAUSEDBYPRESSUREONTHECONNECTIONJOINTDURING Hli.............. 177 MFS............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. 3624 EN66............. 2 EN660............. IN U5"hi'iiLUhdl.[HESEPARATIONISAPPAFENTLYCAUSEDBYPRESSUREONTHECONNE HIT............. 178 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER.. 3624 EN66.....'........ 2 EN66U............. IN EN54.............. F CAUSE 0F FAILURE.. UNKNOWN. HIT.............. 179 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. 3624' EN56............. 2 EN66U.....;....... IN -EN6A.............. F CAUSEOFFAILURE..QHESEPARATIONISAPPARENTLYCAUSEDBYPRESSUREONTHECONNECTIONJOINTD HIT.............. 180 MF6............... R340. ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. 3624 EN66.~............ 2 EN66U............. IN EN6A...............F_ CAUSE OF FAILURE..[THE SEPARATION IS APPARENTLY CAUSED BY PRESSURE ON IFE CONNECTION JOINT DURIN5 B Hli.............. 181 MF6............... R340, ROCKWELL INT / FLOW (CNTROL DIV MF6 MODEL NUMBER., 3624 EN66............. 2 EN56U............. IN EN5A.............. F CAUSE OF FAILURE., WORN PACKING DUE TO APPLICATION,

Hli.............. 182 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER. 3424 EN55............. 2 EN65U............. IN EN5A.............. F CAUSE OF FAILURE. WORN PACKIN5 DUE TO APPLICATION. Hli.............. 183 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER., 3624 EN65............. 2 EN660............. IN EN6A.............. F CAUSE OF FAILURE.. WORN 6A5KET. CAUSE UNKNOWN. Hli.............. 184 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER., 848YT EN66............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE., MATERIAL EIOS10N.. HIT.............. 185 MF6............... R340 ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER. 3628-F316JM EN66............. 002.5 'EN55U............. IN EN6A.............. F CAUSE OF FAILURE.. THE VALVE WAS EINDIN6 DN THE SEAT IN THE CLOSED POSITION. THE TORGUE SWITCH WAS TAKING THE OFERATOR DUT 00E TO ANOVERT0RiUECONDITION. HIT.............. 200 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUMBER. 3624MT EN56............. 2 EN65U............. IN EN5A.............. F CAUSE OF FAILURE.. THE CAUSE OF THE LEAK IS UNK G N ALTHOU5H IT IS MOST LIKELY OUE TO NORMAL WEAR / A51N5 0F THE PACKIN5 MATERIAL HIT.............. 201 MF6............... R340, ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL NUM2ER., A3624 Pil EN66............ 2 EN56U............. IN EN6A.............. F CAUSE OF FAILURE., 6 LAND fiUD WAS FOUND LOO 3E CAUSING PACKIN5 TO ELOW ALLOWIN5 PRIMARY COOLANT TO ESCAPE PAST VALVE STEM. Hli.............. 202 - RF6............... R343. r KKWELL INT / FLOW CONTROL DIV MF6 M00EL NUMEER., A361! P't

EN56............. 2 EN66U............. IN EN6A.............. F CAUSE OF FAILURE.. CLEANED THE VALVE STEM AND YDKE BUSHING FOR INSFECT!0N AND REVEALED THAT THE V NURMAL [ETER10 RATION AND WEAR. Hli.............. 203 MF6............... R340 ROCKWELL INT / FLOW CONTROL DIV MF6 MODEL N M ER., 0W6. ACD-3!623729 -EN66...............2 EN66U............. IN EN5A.............. CAUSEOfFAILURE.,INSPECTIONOFTHEVALVEREVEALEDADAMAGEDSEATANDDISCALLOWINGEXCESS n1r.............. 204 MF6............... R340, ROCKWELL INTI FLOW CONTROL DIV MF6 MODEL NUMBER. 3624F316J EN66............. 2 EN660............. IN EN6A.............. F CAUSE OF FAILURE.. THE LEAKAGE WAS ATTRIBUTED TO NORMAL WEAR,}}

ML20215L360

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ML20215L360

Text

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*Q.==

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SUMMARY

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