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==Dear Mr. Moore:== | ==Dear Mr. Moore:== | ||
In the Matter of ) Dochet Nos. 50-259 Tennessee Valley Authority ) 50-260 50-296 Your letter dated May 17, 1974, concerning the 600 psig ASA-rated one-inch Hancock valves at the Brouns Ferry Nuclear Plant required a final report on the survey and recertification recults of the unit 2 valves before the scheduled date for fuel loading of unit 2. | In the Matter of ) Dochet Nos. 50-259 Tennessee Valley Authority ) 50-260 50-296 Your {{letter dated|date=May 17, 1974|text=letter dated May 17, 1974}}, concerning the 600 psig ASA-rated one-inch Hancock valves at the Brouns Ferry Nuclear Plant required a final report on the survey and recertification recults of the unit 2 valves before the scheduled date for fuel loading of unit 2. | ||
Forty c'opics of that report are submitted herewith. | Forty c'opics of that report are submitted herewith. | ||
Very truly yours, n | Very truly yours, n | ||
Latest revision as of 01:22, 26 September 2022
| ML20084H781 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 06/03/1974 |
| From: | Gilleland J TENNESSEE VALLEY AUTHORITY |
| To: | Moore V US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20084H779 | List: |
| References | |
| NUDOCS 8305050052 | |
| Download: ML20084H781 (24) | |
Text
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TENT M.iD 5 7- 3 ', 'o,.'..W Y , T UT:~:0 m m/ r
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June 3, 1974 ;
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Mr. Voss A. Moore, Assistant Director '(
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for Light Water ?seactors, Group 2 !'
Directorate of Licensing e
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t u4 Office of Rcaulation k'3,k '
U.S. Atomic Energy Commission \Q ,
Washington, DC 20545 WJw N i ..p" l; l "i ' ,' . , '
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Dear Mr. Moore:
In the Matter of ) Dochet Nos. 50-259 Tennessee Valley Authority ) 50-260 50-296 Your letter dated May 17, 1974, concerning the 600 psig ASA-rated one-inch Hancock valves at the Brouns Ferry Nuclear Plant required a final report on the survey and recertification recults of the unit 2 valves before the scheduled date for fuel loading of unit 2.
Forty c'opics of that report are submitted herewith.
Very truly yours, n
! L #
/: Q'%. h v J. E. Gilleland Assistant to the Manager of Power Enclosure (40)
CC (Enclosure):
Mr. R. R. Barris Mr. K. L. Sessions General Electric Company General Electric Company 332 Georgia Avenue Chattanoo;,a, Tennessee 37402 9040 Dcccutive Park Drive Knoxville, Tennessee 37919 Mr. R. B. Eeers TVA Projects General Electric Conpany Atomic Power Ecuipment Department l
j San Jose, Caliicrnia 95125 >
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PDR ADOCK 05000259 '$' ( l-S PDR '?
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REPORT NO.:
4 REPORT DATE: MAY 31, 1974 FACILITY: BROWNS FERRY NUCLEAR PLANT UNITS 1 AND 2
SUBJECT:
FINAL REPORT ON HANCOCK 600 POUND STAINLESS STEEL VALVES INSTALLED IN BROWNS FERRY NUCLEAR PLANT UNITS 1 AND 2 Introduction TVA Abnomal Occurrence Report No. BFAO-7427W describes. the occurrence and corrective action taken concerning the fifty-eight Hancock one-inch, 600-'
pound forged stainless steel globe valves installed in high pressure systems in Unit 1. This report includes a survey of 50 percent of the affected 'valves with tag numbers 47W600-18 in Unit 2, and a survey of 50 percent of the affected valves with tag numbers 47W600-19 in Units 1 and 2. In addition, enclosed is the vendor certification that these valves are suitable for service conditions of 1326 psi at 562o F.
Tabulation of Valves Submitted in Appendix A of this report is a tabulation of the Unit 2 valves with tag numbers 47W600-18 that are subjected to design conditions exceeding their primary pressure-temperature rating. Appendix B lists the Unit 1 and Unit' 2 valves with tag numbers 47W600-19 that are subjected to design conditions exceeding their primary pressure-temperature ratings. Those valves marked by l an asterisk have been measured for wall thickness verification.
Wall Thickness Measurements l
Minimum valve wall measurements have been perfomed on 50 percent of the l
. valves with tag numbers 47W600-18 in Unit 2, and 50 percent of the valves 1
with tag numbers 47W600-19 on Units 1 and 2. .,
E
.-- - . , - . - ,. , , . , , . , . , , -,.n, , , - . _ _ . . _ . , , . , _ _
m g Qs 2
A description and tabulation of the wall thickness measurements is pre-cated in Appendix C of this report. Based on the sampling of the Unit i valves in TVA Abnormal Occurrence Report No. BFAO-7427W, only two measure-ments were taken on the Unit 2 valves with tag numbers 47W600-18.
Measurements were taken at all four locations on the Units 1 and 2 valves with tag numbers 47W600-19 The minimum wall thicknesses of the valves with tag numbers 47W600-18 were equal to or greater than 0.280 inch. Assuming 0.015 inch as an absolute maximum depth of marking, the minimum wall thickness is o.280 - 0.015 = 0.265" which is in excess of the calculated required minimum wall thickness of tm - o.243" (reference sheet 2 of Appendix D, TVA Report BFAO-7427W).
The minimum wall thicknesses of the valves with tag numbers 47W600-19 were equal to or greater than 0.268 inch. Again assuming 0.015 inch as an absolute maximum depth of marking, the minimum wall thickness is o.268 - 0.015 = 0.253" which exceeds the required minimum wallthicknessof0.23inchfora3/4 inch 900 pound valve (reference Table NB-3542-1, ASME Section III).
l I
! Vendor Certification j In accordance with the written request from the AEC, enclosed in Appendix D l
l 1s the vendor certification that the valves in question are suitable for i
the design conditions of 1326 psi at 562o F which represents the most severe service conditions in which these valves are placed. The vendor calculations have been verified by TVA (reference Appendix C of TVA Report No. BFAO-7427W).
Q O
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Conclusions Based on the data presented in this report and the calculations presented in TVA Report No. BFAO-7427W, TVA takes the position that these valves are i'ully qualified for the higher design conditions. We request acceptance of this position by the AEC. We recomend that this deficiency be closed for Unita 1 and 2. Unit 3 report will be submitted by June 15, 1974.
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.m (v) s.: .t ;- (RESSER DRESSER INDUSTRIAL val,VE & INSTRUMENT DIVISION DRESSER INDUSTRIES. INC. P. O. BOX 1430 ALEXANDRIA, LOUISIANA 71301
!!ay 16, 1974 tir. Mark Bressler Teiinennec Valley Authority 2 01: Union Buildinr, Knoxville, Tenn. 37902
SUBJECT:
' TVA Contract // 6 8C 37-91062 , Dresser Order #40-93228-0
Dear Sir:
For, and on behalf of Dresser Industrial Valve & Instrument Division, I certify that the 1" 5500W Hancock Forged Stainless Steel Globe Valves supplied on the subject contract are suit-able for services at the operating pressure of 1326 psi at 562 F. This statement is substantiated by the' calculations attached hereto together with the verification of actual min. wall dimensions taken on sample valves. Yours very truly, DRESSER INDUSTRIAL VALVE S INSTRUMENT DIVI
,e K. B. Eacott, P..Eng.
Manager Product Engineering KBU/ba Attachments f cc: L. J. Doyle D. Olano Y. S. Lai f ASHCROFT G AUOES AND INSTRUMENTS
- MANCOCK V ALVES
- COMSOLIDATED SAFETY AND RELIEF VALVES
O.
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DRESSER INDUSTRIAL VALVE 8 INSTRUMENT DIVISION - PRODUCT ENGINEERING DEPARTilENT dresser I"- 550o W VA L.V E . PER TABLE NB- 354 2-\ , FoR Too 16 '/ALVE dy =l" --* t, = o. 2 8 " Me%u Reo WALL THickMEsse.5 As SHoWQ e4 Pl4. ( . ARN , ALL ExcEEDIMG t , = o, 2 8 ", REMcE , VALVE Booy Peessume RATi44 exceeos 9eo ib. l PER. TABLE M6>-15 3 l-5 , FoR 9oo 16, 316 5.5,, WELDl44 E4D VALVE . ALLoNABLE DEstG4 PRESSURE AT 6co*F 15 151o ps1G JHICH is HIGHER THA4 AcTdAL DestGQ CocotTlod SomaeT- Body JoiuT - BoLTIM4 : 4- "4 ( A ,= o. 4 6 O ) GASW.e7: 1 xI 3 FLExt TA LLl C ( Q = [ 7f 56"
. h = o.t on s "
STEM THF20ST = leo l. Ib i 1 SECTlflN I 9 1 CY I I I CHK RIV. I PAGE 0F DATE DATE NO DATE
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& ESSED DRESSER INDUSTRIAL VALVE 8 INSTRUMENT DIVISION PRODUCT ENGINEERING DEPARTMENT Wn,, =(o.7ss G 2P + 6.2 8 b 4 - P) + ( 18o l) ,
=
72s (i.74se)(iszo + 6.ze(.roiO'(i. iasO CO(15sO + Ji 8cil
= 152 3 lbs 4 s 2s Soq suess = .
= I F,895 P$2 4-(.11 0 i PER TABLE I-7 3, FoR SA113- B J ,. S = 2 5, coo psi A7 foc p - a
> f$oNNET biMe458cOS IS S Honed t4 1:lG. 2. , Co4SERVATNELY ASSUME THE BoM45T BElGQ A BoqED FLA4GE G: F-cLLovJitd@
D i M e- M s i o M S ( PER SECTIO 4 VM , APPE4 DIX .IE ) : A = 2.13 2 " f5 = o. ;s 3 " C. : 2.625 "
@, : 0.36"
-t : o.5" ,
G = 1. ~16 5Yo i : C.1015 l m '= 3. o l l SECTION CY I CHK ! TiV. ! PAGE 2- 0F l DATE DATE NO DATE l
O v
@RESSE&
DRESSER INDUSTRIAL VALVE 8 INSTRUMENT DIVISION PRODUCT ENGINEERING DEPARTNENT Tiit sTResse.s N BoMMET vocea i,s2.6 esi PRE 550RE PER - ASME CODE FLA4Cve. DestG4 PRoceoup.es : Sn = l i,S l q psi < ).5 5 = 25,50o PSI SR: I T,5 69 f 51 <.l.5 5 = 2.5,900. PSI S t = 10,511 P51 < l . 5 5 = 2.5, Soo P5 t i I P O R. S A-l % 2. GlPADE 316, A llc'dA S LE S A7 6 c o* F is ll,oco est . . t SECTION EI ! D4TE CHK ! DATE RT/. NO
! PAGE 3 0F DATE
4
. * < &. ~. _
' DIM ENsiONAL EXAMINATION
- VALVE 1 VA LvE 2. .
s. A
.330 r .330 .
a . . r .sc o 460 1
-> 720 .730 s- .
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1 , . BONNET so/P GLOBE VALVES .
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