ML19242B274

Responds to IE Bulletin 79-04.Increased Weights of Velan Valves Have No Significant Impact on Overall Stress Calculations for Piping Involved

ML19242B274
Person / Time
Site:	Calvert Cliffs
Issue date:	07/13/1979
From:	Lundvall A BALTIMORE GAS & ELECTRIC CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 7908070806
Download: ML19242B274 (2)

Text

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.. 78cc BALTI M ORE GAS AN D ELECTRIC CO M PANY GAS AN D ELECTRIC BUILDING B ALTI M O R E, M A RYLAN D 21203 July 13, 1979 ARTHUR E. LUNOVALL,d A.

Vict Pas siotwf S u p*L Y Mr. Boyce H. Grier, Director Region I, Office of Inspection and Enforcement U. S. Nuclear Regulatory Comission 631 Park Avenue King of Prussia, PA 19h06

Subject:

Calvert Cliffs Nuclear Power Plant Units Nos. 1 & 2, Dockets Nos. 50-317 & 50-318 Restonse to IE Pulletin 79-Oh

Reference:

BG&E letter dated h/30/79 from A. E. Lundvall, Jr.

to B. H. Grier, same subject.

Dear Mr. Grier:

The referenced letter forwarded initial response to IE Bulletin 79-0h and stated that we vould provide, by July 16, 1979, the results of reanalyses to verify that cel-tain uiping stresses were within Code ellov-able. These stresses were associated with seven (7) lines which ccttained check valves whose weights were determined te be in excess of original design data. We have now completed the reanalyses, and the results show that the increased weights of the Velan valves has no significant impact -

on the overall stress calculations for the piping involved. The attached table su=arizes the results of the analyses.

Very truly y s,

/ )

n f. J i

cc: Office of Inspection and Enforcement U. S. Nuclear Regulatory Co==ission Washington, D. C. 20555 Attn: Director, Division of Reactor Operations Inspection Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attn: Mr. R. W. Reid, Chief, Branch #h J. A. Biddison, Esquire G. F. Trowbridre, Esquire Mr. E. L. Conner, Jr.

Mz . P. W. Krure - CE Mr. J. W. Erothers - Bechtel l L.dj!; I M' oi 7908070SGG

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TABl.EJ R FILW.5 ,j .

ITDi _STR ES S_y S I) . SU Pf0RLyI"iTttJNi I suff02LDomsTn RAM

'U PSTR FAM E i LoAa (lbs.) All.OW l TYPE ' LOAD (ths.).

]

Ot. DINE OI.D

_WlDOWNSTRFN1 i NEW ALLOW.jTYP OLD NEW (lbs. i QLD ' NFW (lbs.)

l l {

l j 1 DBE I '

565,1155 469 1123 it) 800 800 1130 N/A - - - No physical changes required.

4" HC2-1369 Seis.

t Valve DCN's tasued to reflect re-Wt. 197 i 252 l 130 120 ,

analysis.

432 lwithin

_432}432l412 1

Press. .

6" of 2MI (I - .I I"N= s NI NMd2LQ I

= {

11 3 l

' l liHE ,

l 407 N/A - - -

!Pene- Fx 1484 t 888 Stresgea well f l ead i tan.em on panetratten 4" HB-66-1001 Sets. 191 1511l 189 Wt.

itratinn Fy 471 I 803 ,w ithin allow- do not c wa.e any preblem, i 187 747l159 159 l Cap Fz 667j 170 able rance. '.i phvnical ch.niges required.

TotalI579 2459i 549!201 201[20l Press. 201 u 767 Ill,000 iMn 1830 12541 !Nosignificant DCN's 1Fauej to reflect re-

. My 4425 4694 increane. a

, itz 847 2068 l nalysis.

• j i j

D8E l l

405 ! N/A - - -

l l'ene- Fx 455 407 Stresses Same as above.

4" HB-68-2001 Seis. 188 1487 113 Wr. 118 236 159 ! ttration Fy 285 748 !well within H14l201 Cap Fr 365 416 ; a l l ow.ibl e l Press. 2013 201 201[ 't - 775 1145 i r an g.'

d id d['UI.2/*M 2 3 kil .31,000 l

lMy2245 2375 ho significant e

, ttz 700 2063 increase.

I DBE Same as above.

(" HB-52-1001 Se t s .I 69 171 41 81 Penetra- Fx 500 Fa 688 Stresses fx 1141l1134 12003

& WI. 63 112 102 180 tion cap. Fy 1800 lFy 2448;well witiA Pipe Fy 14?4 ,1532 11100 6" HB-52-2001 press, 648{648 648 648 Fr1300jfz 1624lin allow- Anchnr Fz 1221 !I213 '20 30 2660 4000 (Inside Ctat)'lota'l 1Ho t 9til'III N 09 15,000 Mx 6700 Ma 5920'able lMx2236

~~ My 4400;My 7314 range. . My 1681 1634 4000 I Mz 3400fz 2779 signifi% !Mz 1921 1921 4000 I cant l '.i- l crease. i l

. I f f DnE 4000 Pene- Fx 500

• 500 Stresacs Same as above.

1600 1600 6" HB-52-1001 Sets.475613606 3548 3058 H1 tration t'y I t'0O 1400 well.within Wt. 1446 1891 Cap lFr1T00 1300 alinwable 6" Hb-52-2303 Press. 927 l'2062 64 t 648{648 648 Mx 6700 6700 frange.

EaW)WDK

[outside Ctait) **""~"* W.T MW W,TsD6-4400 No significant

~ ~ My 4400 g

i Mz 3400 3400 l increase.

L-- l - - - - -

a._______.._.-_._.L__.- Note:

Improvements in the computer prograin use to perform these calculations, these and improved changes account for the endeling techniques now provide snre accurate analysis; apparent discrepancies in this table.

t 8