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UNITED STATE 3 ATOMIC ENERGY COMMISSION DIRECTORATE OF REGULATORY OPERATIONS REGION ll - $UIT E 81 A 2 M PE AC HT REE ST REET, NOR f HwE ST F(g $
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s, Acting Chief, Facilities Test and Startup Branch, Region II C. E. Murphy, Branch Chief, Facilities Construction Branch, Region II TENNES E VALLEY AUTHORIT" (BROWNS FERRY UNIT 1) - DOCKET No. 50-259 The TVA Browns Ferry Nuclear Plant Verification Program on Wall Ihickness of Valves, Appendix I, Documentation Package, Unit 1 satisfies Region II letters of June 30, 1972, and February 15, 1973.
n e no further questions and unresolved itemp, Valve Wall Thickness is closed.
Attached are the working papers and the documentation for this unit.
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W. D. Kelley, Reactor Inspector Engineering Section Facilities Construction Branch
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C. E. k rphy, Branch Chief Facilities Construction Branch, Engion II TENNESSEE VALLET AUTHORITY (BROWNS FERRY UNIT 1) - DOCEIT No. 50-259 l
The TVA Browns Ferry Nuclear Flaat Verification Program on Wall Thickness of Yalves, Appendix I, Documentation Fackage. Unit 1 satisfies Engian II letters of June 30, 1972, and February 15, 1973.
no further questions and unresolved item 4, Valve Wall Thickness is closed.
f Attached are the working papers and the documentation for this mit.
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C. E. Marphy, Braneh Giaf, Fant11 ties Constrasties Breneh, Engion II TIMESSEE VALLET AUTWORITY (REONES FEBRY UNIT 1) - DOCIET 30. 50-259 The TVA Buwwas Ferry Nuclear Flaat Derification Progran en Unil Thieknese of Yalves, Appendiz I, Docuamasaties Peekage, Unit 1 fies Engies II 3
1stters of Jens 30, 1972, and February 15, 1973.
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questises and unresolved ite% Valve Wall Thicknese la sleeed.
Attaebed are the usrking papers and the documentaties for this unit.
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W. D. Kalley, Reaster Engiesering Section
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NUCLE AR ENERGY COMPANY DIVISION 175 cuaTNit AVE SAN Jo$f CAUF. 95125.. AREA code 408, TEL. 297 3000, TWX NO. 910 338 0114 T_
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f TVA Letter No. 2085 March 27, 1970 c not:0 WlLt RECEIVED
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MAR 301970 Concral Electric Company c,3, Sect err.
1301 Hannah' Avenue Northwest
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Knoxville, Tennessco
Subject:
Darling Valves 7
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During our Messrs. Beers and Barnholt visit to Knoxvilic on March 18, TVA was advised of a design probica existing with the Darling recire valves.
At this time, we wish to bring TVA up-to-date on our progress in'this regard.
Cencrally the problem results from excessive machining of the valve barrel in the area where the barrel meets the body finnge.
Original calculations on the valves were made on the basis of the as-cast surface.
Subsequent machining.for the purpose of clearing the bottom nut arca resulted, we believe, in undersizing the body barrel and undersizing the fillet between the barrel and the f1'ange.
When this probics was discovered, wo instituted an extensivo program with Darling to define the probica and to determine what repair, if any, would be necessary.
This program included stress analysis by Tolodyne as a subcontractor to Darling and strain gauge testing of a Fitzpatrick 28"x24"xy" valvo and a 22"x18"x2J" Peach Bottom valvo.
Simultaneously, various repairs were considered. Those include wcld buildup of the barrel, mechanical strengthening of the area by means of rings and several other possibilitics.
As of today, the strain gauge testing has been completed on the 22"x18"x22" valvo and the r. train gauge testing on the 28"x24"x28" v31vo will be completed next wcok.
At this timo, the measurements will be fed o Tolodyne's computer program and furthe: calculations made; the results shou
'.)c availabic about the 15th of April.
At this time a decision will be made as to hcu to proceed.
Simultanco sly, Darlfr. has prepared a welding procedure for repair which is now under study by Concr..' 21cceric, it has been detennined that using mechanical close tolerances that would be required.
rings is not practical, due n 2
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s GENER AL @ ELECTRIC Mr. H. M. Bankus March 27, 1970 i
This is a gencric problem with these valves manufactured by Darling, and it affects about ten projects. Picase be assured that an all-out effort, both by Darling and General E1cetric, is being expended to solve this problem. We will keep you informed as further progress is made.
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K. G. Beers, Manager TVA Project t
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0006 1437 A30HL 0 B20FJ 0033 gg,4 Ver SAN JOSE CALIF 5/14/70 C
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M EUSD GE KNOXVILLE TENN I
PLEA S, J11E TVA AS FOLLOWS 1)
SCH EL OF LVENTS A)
APRIL 8--PRELIMINARY EXPERIMENTAL DATA PEACH BOTTOM 22"
( DON E) b)
APRIL 17--PRELIMINARY EXPERIMENTAL DATA FITZPATRICK 28"
( DON E)
C)
APRIL 29--AXI-SYMMETRIC EVALUATION R$ PORT PEnCHBOTTOM 22"
( DON E) b 0)
APRIL 29--FINAL EXPERIMENTAL REPORT F1TZPATRICK 28"--DONE
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MAY 15--FINAL EXPERIMENTAL REPORT PEACHBOITOM 22" F)
JUNE 5--AXI-SYMMETRIC EVALUATION FITZPATRICK 28" G)
EXTRAPOLATION TO OTHER WALL THICXNESS PROVIDING CORRELA-TION BETWEEN STRAIN GUAGE DATA AND AXI-SYMMETRICAL ANALYSIS IS GOOD WOULD BE AVAILABLE ABOUT MIDDLE OF JUNE FOR 28" AND ABOUT MAY 25 FOR 22".
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2)
MEASUREMENTS OF TVA VALVES PLANNED WITHIN NEXT TWO WEEKS.
3)
THE RESULTS ON 22" VALVE APPEAR TO BE SATISFACTORY.
FINAL I
RESULTS WILL BE XNOWN BY MAY 25.
4)
REPAIR PROCEDURES ARE IN HAND FOR APPROVAL.
TVA UNIT 3 VALVES CASTING THICKNESS HAVE BEEN CHECKED AND ARE SA TISFA CTORY.
STUDS WILL BE USED IN PLACE OF THROUGH BOLTS FOR M.:E VALVES TO ELIMINATE MACHINING ON BARREL.
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D. R. htterson, Pr cipal Machanical Engineer, 225A UB-K Juno 17, 1970 Dn0' NS ERRY NUCLEAR PIANT - ECIRCUIATION SYSTEM VALVES, EVAIL% TIO AD00mCY AFTER IMDCRCUTTING BENEATII BOUY_ FIANGE l
Tho probics has been previous 3y outlined in memorandum from W. P. Kelle6han t i
R. S. htton dated Arch 27, 1970, and Interoffice hiling Slip from W. P. Kanecha:
o to R. S. htton dated Arch 31, 1970.
t hr. Cecil Cck of General Electric gave us a status report on the valves on June 4, 1970, in Knoxvi ne.
1 Porsens Procent General Electric TVA Dob Decro Roy H. Dunham Ihlph Iccon Cecil Oak Donald B. Weaver D. R. Patterson The reennlysis of the recirculation valves for Units 1 and 2 win be based on The va]vos were ordered for a design pressuro of 137 requirca design prosauro is 1325 psig as defined long ago to TVA in GE letter DF-1650 and BF-1726 and as agrood by TVA in letter No. 2692.
The prosent status on the stress analysis pro 6ra.:n is.ar. foHows:
1.
The final experimental report (containing experimental data) and the axi-handed to TVA.sy.=ctric cvaluation of the Peachbottom 22" valvo is completo and copi thinnest van reasured is saticfactory.The report conclude's that the 22" Pe least as good as tho Peachbottom valves. GE believes that TVA 22" valves are at 2.
The final experi=cntal report (containing experimental data) for the 1
Fitzpatrick 28" valve is complete and was handed to TVA at the meeting axi-sy:: metric evaluation for the 28" valve will be available about June 5 The I
3vin be availablo about Juno 15The extrapointion of the axi-symmetric evaluation l
The thinncat 28 valvo yet measured is a valvo is satisfactory.Peachbottom valve and data win be extrapolated to c~
I valves are expected to be at 2aast as good as Pegahbottom.Pra14=4 n
TVA Exh ib it 0 Page 1 of 2 1
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Schanical Design Filos June 17, 1970 BROUNS K:RRY NUCLF.\\R PIAI;T - RECIRCUIATION CYSTEM VALVES, EVALUATION OF DESIGN ADTUACY APr2R UNDERCUMTIG BSIEATH BODY FIANGE 4.
GE vill reco:::end formily that wo proccod with installation of Unit 1 valvec and reasuro tho wall thicknoon bolov tho finnco at a conveniont timo.
GS stated that Ihrling has agrood to pay up to /,2500 por valvo for mking theco measurements. GE belioves that TVA valves are catisfactory and are therefore not reco==cnding that measurements be endo imediately.
If inves-tigation indicatos valves are not satisfactory, they will be repaired in placc. GE reports nnother problem with these valves. For a design pressuro of 1325 psig, the required hydrostatic tost prosauro is 2410 psig taking into account the allowablo si ress at operating temperature and the allowable stress at the test tecnorature(14,400 psi and 17,500 psi respectively from 1965 ASIC Code,SectionI). In the courso of production, the valvos aro tested three different times but tho final hydrotest which was recorded for the record was run at 2350 psig or 60 psi below the test pressure required by AU31 D31.1.0.
An car.ly hydrotest was performed on the valves during production at a tott prc::.iuro clightly abovo 21:10 psig but data vero not recorded. This probica appl:os only to the dicchargo and bypass valves which aro subjected to pu=p disc} arco pressure. GE and TVA reprocentativos fcit that there is no ques' ion of the technical adequacy of tho valvos; however, the only properly comp:.cted records for the Units 1 and 2 valves win show a hydrotest presnure of 2150 psis. After considorablo diccussion, it was decided that GE vould request certifice. tion from D.arling that the valves had been tested at or Ocyc 2h10 p31g with vhltovar supporting infonmtion they can Ainlich auch as shop instructions, proceduros, etc. (Post meeting note:, GE confir.:s that certification and shop procoduros win bc furnished by Darling.)
If this can be dono, wo win accept tho valves for Unit 1 without accitioral testing.
Discharge and bypass valves for Unit 2 vin be returned to Darling for hydrctost at 2410 psig.
Unit 3 valvos are still in production and records win be kopt to indicato proper hydrotest.
The above agreements win be confirmed in writing by GE.
DRP:DC1 D. R.1%tterson CC:
J. R. Parrish, 505 UB-K U. P. I.cllechan, Docatur (3)
R. S. Patton, 14 1B-C W. Nixon, 520 US-K -- Arrancomonts should be made for your inspoctors to witness hydrotest of the Unit 2 valves when they are returned to Darling (3)
C. 1:icimlson D.' R. Patterson L. D. Ueber, 503 US-K -- Please nnM a cow to AEC CamDW uce Exhibit 0 Page 2 of 2
R. T. Itthcote, Jr., P.:nject 2snacor, lhowns Ferry I!uclear Plant, Dceahir (3)
Hi C. Russell,'Iket.as reny I:u: lear 13.cnt Dacign Iroject 'annger, h05 CCL-X fiprjJ. 23, l!T/h v.urIct.?Ici Ir.2mu c t 1:f.LL TnIc::cca or vars n:Iwarm To 20ml Cf.IT.,7f - BRONUS FERRY UUCLEAR PLANT lie tycnnnit thrno ecric: ef the ct'b.icct report coverir.3 th: Cincr;ision of the pro: gen end $ri.tr'in; the data checta on tait 1 valv:a. Flcava rrJ;a cro cery cvellablo i.e 12e E'C 1.:.pcotor.
'Dr: i'r.r rr 1 requirca retstmcent of 1"tita 2 and 3 v'1ven. Ihrever, the IC IJ:3 covnir: n3 inz cto: ba: indianicd that he vill bc cabini' icd rim t'in cita reue? :Y; bcire; in :,m t.cten. Convernien to inchet: $n reqir:.cd cr0.7 cf the rarc.u 1.uu rn:icir.;c. 'hia chould repmacnt a cavims in rachours nbin to be c::'g&d on the job.
It la cu~estad eat v. nit 2 valvo r.cacurteent be coupleted by ft:cl 1cading
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Your coeperatiet in this encrona tank h;c been crect'y cprrc0iatod.
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