ML18030A007
| ML18030A007 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 06/16/1980 |
| From: | Curtis N PENNSYLVANIA POWER & LIGHT CO. |
| To: | |
| References | |
| MCAR-G-1, NUDOCS 8006200366 | |
| Download: ML18030A007 (8) | |
Text
REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:8006200366 DOC SEDATE: 80/06/16 NOTARIZED:
NO DOCKET ¹ FACIL:
Susquehanna Steam Electric Stationi Unit ii Pennsylva 05000387
'0 N8 squehanna Steam Electric StationF Unit 2i Pennsylva 05000388 rkL-,UMBEL"-4 AUTHOR AFFILIATION URTISF N ~ 'tl, Pennsylvania Power 8 Light Co, REC IP ~ NAME RECIPIENT AFFILIATION
SUBJECT:
Forwaras final deficiency rept re failure to stake stem lock nuts when instal I ing Limitorque moto(
oper ator s on val ves, Suspect valves were identified 8 measures taken to inspect or stake valves'ISTRIBUTION CODE:
0019S COPIES RECEIVED:LTR Q ENCL. Q SIZE:
TITLE: Construotion Defioienoy Report (IOCFREO,ESE)
NOTES: S<fffZf~<E-RECIPIENT COPIES ID CODE/NAME LTTR ENCL ACTION; AD LICKS/NC 21 1
1 LAgQSH8/dOK,20K, 1,
1 RECIPIENT COPIES ID CODE/NAME LTTR ENCL BC yOcc,&CECOnA5, B.
1 1
PM~fPgK~ f, 1 l 1
1 INTERNAL AD/RCI/IE EDO 8
STAFF 07 FIELD COOR/IE13 HYD/GEO BR 22 MPA 08 OELD 23 QA BR 10 STANDRDS DEV 11 05 02 R
17 01 R
1 R=ffSS REG FILE 1
1 AEOD 1
EQUIP QUAL BR 16 1
HANAUERFS, 1
ICE 1
1 1
1 1
1 2
2 1
1 1
1 1
EXTERNAL:
ACRS BASIC 24 04 16 16 1
1 LPDR 03 1
1 JU~'a
)9~~
TOTAL NUMBER OF COPIES REQUIRED; LTTR 38 ENCL 38
TWO NORTH NINTH STREET, ALLENTOWN, PA.
18101 PHONE:
(215) 821 ~ 5151 NORMAN W. CURTIS Vice President-Engineering 8, Construction 821 -5381 June 16, 1980 Mr. Boyce H. Grier Director, Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 g$
8 pg wg
(~0 SUSQUEHANNA STEAM ELECTRIC STATION FINAL REPORT OF A DEFICIENCy ON LIMITORQUE MOTOR OPERATED VALVE STEM NUT STAKING - MCAR G-l ERs 100450/100508 FILE 840-4 PLA-497
References:
PLA-475 dated April 25, 1980 PLA-403 dated September 26, 1979 PLA-329 dated March 2, 1978
Dear Mr. Grier:
This supplements the above referenced correspondence and provides a final report regarding stem nut staking on Limitorque motor operated valves.
The report has been prepared by Bechtel Power Corporation and concurred with by PPQL.
All Limitorcjue motor operated valves installed in Units 1 a 2 have been inspected/staked.
Those valves that have not yet been installed are considered indeterminate and are being controlled via Bechtel nonconformance and condition reports.
Please advise should you reguire further information.
Very truly yours, N.
W. Curtis Vice President-Engineering a Construction-Nuclear Attachment JRB:mcb Ivor 8006200SC 4
PENNSYLVANIA POWER 8
LIGHT COMPANY
Mr. Boyce H. Grier June 16, 1980 cc:
Mr. Victor Stello (15)
Director-Office of Inspection
& Enforcement U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. G. McDonald, Director Office of Management Information
& Program Control U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. Robert M. Gallo U. S. Nuclear Regulatory Commission P.
O. Box 52 Shickshinny, Pennsylvania 18655
MCAR G-1 LZMZIOKQE YQIOR OPERATOR VALVE SEX LCCK MiT STAKENG SUSQUEHANNA STEAN ELEGIAC STATION P ep edby:
~S if Checked b Approved by:
- Pro5ect Engineer
~, 8
- En~eer~ Nnager BECHZEL PEG'ORPORATION San Franc&co, CalMornLa May 15, 1980 P109/ll-l
SCAR G-
~ral Report Page 2
6'8O '9824 N4T 2 FOAL HEPOK'OR LIt~RQUE NZQR OP~~~
VALVE STOIC LOCK NUT STAKING
'Ihe Q. A. FLyer 78-F6 dated 7/6/78, outlined that a possible generic problan exists M r~rd to va1ve ma~acturers fail~~
to stake the stan lock nuts when ~~Callid Lfrd.torque motor operators Yodel Nos.
SNB & SIC on their valves.
En~eering note:
although the QA flyer mentioned all Ltd.torque operators 8%3
& P!C have~ this problem, the staktrg is only fzvrolved ~m risi~ stan "ype valves.
~~s does not per~ to the type of'otor operators Chat are mounted on the valve shaft by nmans of bore and keyway on a splined adapter.
Also, at C~
t~ we have not ordered S!C Yxdels nor do we have any at the Jobsite.
As a result of this, Bechtel SPADO notified Ch Jobsite (DC8 095528, P1C3865, dated'l/8/78) of the potentia1 problem and reccrmerded t?wt all Liad.torque operated valves be checked for prope.ly staked lock nuts.
GZCRIPTION OP HK~~C DurIrg the assenbly of Che va1ve/operator, the lock nut (which locks the stem nut M position) must be staked.
D'his is not done, it is possible for the lock nut to back out of the threaded?ole and allow the stem nut to move up the stan and render the valve inoperable.
III.
ANALYSIS OP SAF2, 7 PPLICA~IONS't Bechtel SFHO request Che Jobsite inspected a sample of fifteen (15) rising stan Limitorque motor operated valves and suhnitted a list of the results.
A review of this list indicated that several of these valves were required for safe shut-down of the plant.
Werefore if sMcLng is not done on these valves, that are required for safe shutdown of the plant, it is possible that these va1ves could become inopemble.
Because of this fact, we ~ormd PP&L that this was a reportable condition as described by 10CrW50.55(e)
~~
our letter BLP-10630, dated Y~ 20, 1979 (DCf 10150R).
CORRECTI'JE A~ON TAKE The cause of this problan is that the valve suppliers either improperly stahmd the stan lock nuts durir~ operator/valve assanbly or that s~g was not performed.
We following corrective action steps have been taken:
a.
Bechtel SFHO has identified all suspect Llmitorque motor operated ris~~
stan valves usfrg the Valve Lf.st Index Report for Susquehanna Stan ELec-tric Station Units 1 and 2.
b Bechtel GPFO requested the Jobsite to inspect/stake these valves.
To date all Lfmitorque Motor Operated valves, des~ted for installation or installed
~m Units 1 and 2 of SSES have bem expected/staked (see Table 1), with the folio~ exceptions:
P109/11-2
L.
A total of 33 "Q" Listed motor operated valves renal to be inspected/
staked (See Table IZ).
'Ihis work is documented in NCR 3424 and will be canpleted prior to close-out of'his NCR.
2.
A total af 47 non-"Q" Listed antor operated
- valves, designated for installation, ren"~ to be irspected/staked.
'Ihis work wiLL be acccxn-plished by the use af Condition Report No. P-960.
c.
In addition to the 80 valves that have not been inspected/staked to cate,.
a total af 26 non-"Q" aator operated valves have been designated as spare valves.
'Ihese valves will be added to the 47 non-"Q" motor operated valves specified in the Condition Report.
V.
CONCLUSICH NAY26'80 '.o824 As stated in this report, all susp ct IdmLtorque motor opera,ted valves, designated for installation or as spares, have been icentified ard measures have been taken to insp ct/stake these valves.
In addition, letters have been sent to the followirg valve suppliers informing them af the potential problem:
Anchor Darling, Vialworth, Henry Vogt, Yarway, N.V.D. and Pacific Valves.
Ihese letters were to assure that all Limitorque rising sten motor operated valves at the suppliers were staked as well as all future orcers.
Additionally, we recuested that the Bechtel PSQR's were aware af the staking requiranents ani would inspect all risirg,stem abator aperted valves for proper string.
'iherefore, we feel that we have adequately addressed generic problem which wiLL be finaUzed with the c1osecut af NCR 3424 and the Condi-tion Re~rt, P-960.
'I gg 6'ao '9824
/CAR G-l Pinal Report Page 4
No. of Suspect No. of Valves No. of Valves Purchase Order N. 0. Valves I@so/Staked Not inspected Remarks Conce~
Valves Not inscected P-10A P-11A P-12A P-12B P-14A P-14B P-15B P-17A P-21C P-22A P-22B P-24A
~Spares Subtotal H-001 5&402 73 4
8 2
37 16 24 26 55 26 526 16 50 576
,70 101 7
2 2
23 u6 26 38 435 13.
22 35 470 3
0 10 1
0 0
14 2
2 16 0
17 26 91 3
12 106 3 are tfQtf 10 are "Q" ITQII tfQII 2 are "Q" 2 are non-"Q" 16 are non-"Q" 17 are non-"Q" 30 are ITQII 35 are non-"Q" 26 are non-IIQIT Spare Valves 3 are IIQff 12 are non-"Q" 33 are tfQIT 47 are non-"Q" 26 are non-"Q"
~e Valves
~NOTE:
We 26 Spare Valves are Non-"Q" and are not deslgnated for ~tallatl.on M SOS.
P109/114
r/ ~
~~
~
MCAR G-Final Report Page 5
~
NAY 26 '80
~~ 1 9 Q 2 4
'2m following table lists the remaining 33
>>Q>> listed valves to be inspected/staked per the NCR 3424.
ffQn M.O. VALVES NOZ 3NSPECIKD/STARK P.O.
P-10A P-10A P-10A P-12A ff tt P-12A P-12B P-15B tf ff P-15B P-17A P-17A 2.04 7.12 17.02 1.12
- 2. 02
- 2. 02
- 2. 02 2.12 2.14 2 30 9 02 9.12 9.12.
1.28 35-21 35.22 35.23 35-24 35.26 35.27 35.28 35-41
- 35. 42 35-43
- 35. 44 35-45
- 35. 46 35.47
- 1. 02
- 3. 02 VALVE ZDE~ ECATZON 14>>-DBB-GT~MO-2F006 24>>-DBB-GB-M3-2<017B 4>>-EBB-GT-bKj-2F012 12>>-GBB-GT-NO-2F021B 24>>-HBB-GT-NO-2FO04A 24>>-HBB-GT-NO-2F004B 24>>-he-GT-t IO-2FO04C 16>>-HBB-GT XO-2F042 10>>-HBB-GT~MO-2F059
'>>-HBB-GT-NO-2F075 18>>-GBB-GB to-2F024A 24"-GBB-GBY-NO-2F048A 24>>-GBB-GBY~10-2&48B 6>>-GBB-GT-<iO-2F075B 2>>-C BAUNT-NO-2F001B n
n 2F001F n
n 2FOPlK tf
-2F001P n
n
~00 2F
-2FQ02K
-2F002P tt
~03B n
n 2FPP3F tf
-2F003K tt ft
~0Q3P
-2F0006 n
n
~007 2>>-CBA-GT-Ã0-2F009 24>>-DCA-GT~MO-2F015A 6"-CCB-Ga e-2F023 252A 249A 252A 249E 249A 249A 249A 252A 250B 252B 249A 249A 249A 216A 283H It ff tt It ff tt tf 283H'4m 24 M-001 M-001
&001 3n-DBB-GT %0-25012 4>>-DCA-GT-NO-2F032A 4>>-DCA-GT~MO 2F032B 25PB 264B 264B SUS ~ Start-Uo System M.O.~ Motor Oper aCed P109/11-5