ML17254A872
| ML17254A872 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 07/31/1984 |
| From: | Kober R ROCHESTER GAS & ELECTRIC CORP. |
| To: | Paulson W Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8408070198 | |
| Download: ML17254A872 (7) | |
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REGULATORY FORMATION DISTRIBUTION SY
.M (RIDS) c ACCESSION NBR; 84080701)8 DOC e DATE: Grl/07/31 NOTARIZED; NO DOCKET FACIL:50-2i14 Rober't Emmet Ginna Nuclear Plant< Unit ir Rochester G
05000241k AUTH,NAME AUTHOR AFFILIATION KOBERrR ~ 1tsr, Rochester Gas 8 Electric Corp.
RECIP,NAME RECIPIENT AFFILIATION PAUL SOfl H ~ A'.
Opera ting Reac to'rs Branch 5
SUBJECT:
Forwards response to 8r10612 request.
for addi info re 831201 request for one-time exemption from containment, tendon visual insp requirements, Individual tendon force levels provided.
DISTRIBUTlON CODE:
A001S COPIES RECEIVED:LTR
/ENCL g SIZE:
TITLE:
OR Submittal:
General Distribution NOTES:NRR/DL/SEP icy ~
OL:09/19/69 0500024r1 RECIPIENT ID CODE/NAME NRR ORBS BC 01 INTERNAL; ADM LFMB NRR/DE/MTEB NRR/DL/GRAB NRR/DS I /RA8 RGN1 COPIES LTTR ENCL 7
7 1
0 1
1 1'
1 1
1 1
RECIPIENT ID CODE/NAME ELD/HOSE NRR/DL D IR NRR D
/METB F I1.
04 COPIES LTTR ENCL EXTERNAL: ACRS NRC PDR NTIS NOTES:
09 02 6
6 1
1 1
1 1
1 LPDR NSIC 03 05 TOTAL NUMBER OF COPIES REQUIRED:
LTTR 27 ENCL 24
ZIIII Wn AND g'y ~l ]fiIIIEIII I /SZSiZ8'Zi~,IIIII ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N.Y. 14649-0001 ROGER W. KOBER VKEPRESIDENT ELECTRIC &STEAM PRODUCTION TELEPHONE AREA CODE TI6 546-2700 July 31, 1984 Director of Nuclear Reactor Regulation Attention:
Mr. Walter A. Paulson, Acting Chief Operating Reactors Branch No.
5 U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
December 1,
1983 Request for One-Time Exemption from Containment Tendon Visual Inspection Requirements (Ginna Technical Specification, Section 4.4.4.1)
R.E. Ginna Nuclear Power Plant Docket No. 50-244
Dear Mr. Paulson:
This letter provides the additional information regarding the above referenced subject requested during the conference call of June 12, 1984 with the NRC staff.
In our letter dated December 1,
- 1983, we reported that two of the four tendons adjacent to tendon 75 yielded lift-offforces of 701 and 724 kips.
These values correspond to tendons 76 and 77 respectively.
The data sheet for tendon 76 was included with the 1983 Ginna Tendon Surveillance Final Report submitted with our letter dated March 26, 1984.
The data sheet for tendon 77 was not submitted because it was not included in the list of tendons originally selected for the surveillance.
Subsequent to submitting our letter, a revision of the stressing rod calibration equation yielded lift-offforces of 700 kips (576) and 723 kips (577).
These values are reflected in the attached data sheets for tendon's 76 and 77.
The December 1,
1983 letter also provided results of an evaluation of the containment structural integrity considering the decreased pre-stress level of tendon
- 75. It was explained that the minimum design requirement in terms of a vertical membrane stress resultant is 299 kips per foot.
The calculated stress resultant based upon actual and predicted pre-stress levels of the four adjacent tendons and tendon 75 was determined to be 315 kips per foot.
The stress resultant corresponds to the vertical compressive stresses at the top of the containment structure acting beneath the tendon anchorages.
It is calculated by dividing the total combined pre-stress force of the five tendons by the containment wall length being analyzed, which equals 10.65
@Pl feet (5 x 2.13 ft. [tendon spacing]).
,8408070198 84073i PDR,ADOCK, 05000244
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1 4
ROCHESTER GAS AND ELECTRI ORP.
DATE July 31, 1984 TO Nr. Walter A. Paulson, Acting Chief Operating Reactors Branch No.
5 SHEET NO.
Individual tendon force levels were determined as follows:
1)
Tendon 2)
Tendon 3)
Tendon 4)
Tendon 5)
Tendon 77 724 kips determined by lift-off 76 701 kips determined by lift-off 75 532 kips determined by lift-offafter retensioning.
74 720 kips determined by using the average lift-offof twelve (12) tendons tested during the 1983 Surveillance (not including tendons 75 S
- 76) which were retensioned in 1980.
73 675 kips determined by using the average lift-offof four (4) tendons tested during the 1983 Surveillance which were retensioned in 1969.
V r truly yours,
- y. 6/
Roger W. Kober
PT-27. 2: 10 L) DATE:
C-j7-$'ATAs11EET L
Jur.Y L903.TE>>DON SURvEILLANCE ll rl (3 ).
STRr.sSI NG Ron Strain Force**
(u in/in)
( Lbs)
(l.)
cot4DITIQN (2)
PRES.ljRE GAUGE Pressure Force*
( si)
(1bs) 2)
1tYDRAUfIC JACK No.: g7-5 OO-/g RAI'1 KREA:
l 4)
LOAn Cr:.r.I, FACTOR**:
/'.
sTREsSING 1.on GAGE 5)
TENOOM INEPPCTZO!4 CO!PIENTE!~
lr A P cZQ l /P g~C E C~ ~-
c r.own cEr.r.
Stra.in Force**
(u in/in) (Ibs)
RA~1 POSITIO!4 inches FACTOR **: O.
6 Cot 1'1 1;NTS It1ITIAL:
INCREASING:
INCREASING:
o 8
o mrp 275. 7 r'< 53 25> 2
/
LIFTOFF:
2)
QSUO Aug
~~Et, a~G
<PRG
> 525
< '~ 70Xt'5 /
7>c ~
-~E LIFTOFF
+C)%,
LIFTOFF: I DECREASING:
DECREASING=
+500 4000 2000 3
c r~per 7rl 4E> ~~A d e
o Ec SE/+Qy4rr-JoE, DECREASING:
o Q
g
~/'A
~/p
'OTE.:
l
>>v!E: lr~(l (gg'O'1l'r ETT'.n BY:
(*)
Ram area to be used to calculate ram force in column 2b:
Fore>>
= 8. ff4~0 /2. 7V 'Y
[Gage Pressure (P~>IG) j
(**)
r.oad CelL Factor to be used to calcuLate fore'n colu<nn 4b:
See Attach!nl >>t I
(***) Stressi>>g Rol Gage Factor tn be used to calculate force in r 1 i>> colu!n>> 'lb:
stressinq rod gage factor x (strain Initial..".train Rearli>>g)
V
PT-27. 2: 10 DATA SI!EET 1
JIJLY l903.TENDON SIJRVFILLXNCF.
1)
DATE:
~l /7 $j TENDON IIO.:
- 2) IIYDRAULIC JACK NO.:
3- +gal -/2 Z 7
) IIYDRAULIC PIJHP NO- -
W E ir>
7g Slllf1 STACK Tll'ECKNFSS:
RAII AREA:
pRES.",URE GAUGE Ho.: ~s~r
]z- ~>E 4) r OA.D CELT FA,CTOR**:
A STRESSING POD GAGE FACTOR***:
5)
TEROOW iWSirCTiOR CO>i >En'P.": ~en+>>
e s~
o.( 97
~.rg
/oddly~
X~.g ~
s
.ZL o~
(1)
COHDITIOtI IllITIAL:~
(2)
PRESSi U RE GA,UGE Pressure Force"
( si)'1bs)
(3 ).
STRESSING RODln Strain Force~*
(u in/in)
(lhs)
(4 LO~D CEr.r.
Strain Force**
(u in/in) (Ibs)
RA~1 POS ITIO!J inches CON'II;NTS INCREASING:
INCREASING:
200!3
~g(o z g~. g ru /'/>>
Pro. 5 25~6 5 /Y./
LIFTOFI LIFTOFF +Go gC 2.d 6 C 7 8'u6 y
g gs P/.g g2, JC~O 7ZZ.Q A
7 8't>>'.
~
A'/J LIFTOFF:
J )
0 AuC 0
s-goo 7lV-7
$54 5
guc c zo g~z.
DEC REASING DECREASING:
DECREASING:
2000 gjy. p z > 0 o 5v/. z.
//3
>>0'>'P
(*)
Ram area to be used to calcu1ate ram force in column 2o:
Forci
=
C
- ~C+ >.l~ 7/A LGage Pressure (PSIG) j
(**)
Load C ll. Factor to be used to calculate forr.
~ in coluinn 4Ii:
.iee Attaclnns nt l
(***)-Stressing Ro l Gage 'Factor to be used to ca lru la te force in roil in col uinn 3b:
stressing rod gage Eactor x
( trnin initiai."trnin Ren i>>>)>~~
cniiti,res>> nvi
>>- ~P ~
~>a'r>'.: ~z//gg