ML18227B706

Provides Additional Information on Steam Generator Tube Integrity

ML18227B706
Person / Time
Site:	Turkey Point
Issue date:	02/01/1977
From:	Robert E. Uhrig Florida Power & Light Co
To:	Moseley N NRC/RGN-II
References
L-77-36
Download: ML18227B706 (18)

Text

P. O. BOX 013100. MIAMI, FL 33101 Qt ii~,

Y FLORIDAPOWER & LIGHT COMPANY February 1, 1977 L-77-36 Norman C. Moseley, Director Office of Inspection

& Enforcement, Region II U. S. Nuclear Regulatory Commission 230 Peachtree

Street, N. W., Suite 818 Atlanta, Georgia 30303

Dear Mr.'oseley:

Re:

IE: II: AKH 50-250/76-1 50-251/76-1 This letter is submitted in accordance with the commitments made in my letter dated March 29, 1976.

The st'atus of the Turkey Point Drawings Program is as follows:

l.

As of January 31,

1977, a total of eight hundred

& forty-five (845) drawings have been updated as built in the field.

2.

Of these, six hundred

& forty-two (642) have re-ceived final approval and released to the field; eighty-six (86) in the final approval cycle; and one hundred

& seventeen (117) are undergoing drafting and final, review for adequacy.

During this period, nineteen (19) new drawings were gen-erated by Engineering and released to the field, and eighty-six (86) are in the final approval cycle.

Very truly yours, Robert. E. Uhrig Vice President REU/NFA/hlc cc:

Robert Lowenstein, Esq.

PEOPLE... SERVING PEOPLE

U.S. NUCLEAR REGULATORY Co" >>"EMISSION.

1VIAT Rl L

I NRC FoRM 195 (2 76)

RC>>-

NRC DISTRIBUTION FoR PART 60 DOCKE I E

A FILE NUMBER J uzi Mr Lear g1.ETTE R gfoRIGINAL Dcop'Y

.0 NOTOR IZE D

%UNCLASSIFIED PROP Florida Power

& Light Co Miami, Fla R E Uhrig INPUT FORM DATE OF DJCVhdfflT 1"28-77 NUMBERNF COPIES RECEIVED Ione,s ironed I

DES C 0 IP T ION Ltr re our NRC request....t;rans the following:

lp ENCLOSURE Addi info re steam 'Generator'tube Integrity

..(40 cys e'ncl rec'd) 6p

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PLANT NAMF:

Turkey Point jj3 & 4

)KKCZMM~

SAFETY ASSXGNED AD:

N PRO EC~TNAEA EEj LXC ASST c v

/0 FOR ACTION/INFORMATION PROJECT MANAGER'IC ASST A>>

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REG V IE LA PDR LPDR'SIC:

ASLB:

CONSULTANTS:

ACRE CYE iEKCTEC/ E T~A ISTRI BUTION PLANT SYSTEMS TEDES 0 IPPOL TO OPERATXNG REACTORS STELLO OPERATING TECH EXSENHUT

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ULR KSON OR S TE SAFF, E

ERNST BALLARD SPANGLER SITE TECII GAMMILL STEPP HULMAN SXTE ANALYSIS VOLLMER BUNCH J ~ COLLINS KREGER CONTROL NUMBFR NRC FORM 196 <2.76)

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Ieguiatory Docket. FI<A t P. O. BOX 013100, MIAMI, FL 33101 Q~l leer FLORIDAPOWER & LIGHTCOMPANY January 21, 1977 L-77-30 Director of Nuclear Reactor Regulation Attention:

Mr. George Lear, Chief Operating Reactors Branch 53 Division of Operating Reactors U.

S. Nuclear Regulatory Commission Washington, D. C.

20555 (g Ip

Dear Mr. Lear:

Re<

Turkey Point Units 3 and 4

Docket Nos.

50-250 and 50-251 Steam Generator Tube Xntegrity Su olemental'n'f oxma't'io'n'he attached information is submitted in response to a request.

from your staff.

Xt supplements previous information submitted in our letters L-76-432, L-76-434, and L-77-3.

Very truly yours, Robert E. Uhrig Vice President REU/MAS/ms Attachment cc:

Norman C. Moseley, Region IX Robert Lowenstein, Esquire 01 oocxaco I/a g/

U 5. WCIg CORI Nol

'I RI'EOPLE...

SERVING PEOPLE

F

ATTACHMENT'urkey Point Units 3 and 4

Request for Information Steam Generator Tube Int'e rit Q13. Provide a tabulation summary of the total strains in the circumferential, longitudinal and radial direction at the U-bend apex for tubes at flow slot locations in rows 1 to 4.

The summary should. indicate the effects due to manufacturing, service induced. ovality (hourglassing),

change in U-bend radius, operating thermal and pressure loads and accident loads.

Also compute the effective strains at the U-bend apex.

Clarification of above question.

a.

Provide the requested tabulation for a total of 32 tubes (eight tubes adjacent to the flow slot in rows 1 through 4.)

b.

For the tubes in row 1 provide the requested tabulation for the following two cases.

(1)

Flow slot hourglassing based on current field data for the top support plate in Steam Gener-ator 4B (2)

Assuming full closure of the flow slot c.

For those tubes in rows 2, 3 and 4 provide the requested tabulation assuming full closure of the flow slot.

'13.

As indicated in our response to Question li the operating thermal.

and pressure strains are trivial,and can, be neglected.

Similarly, the strains due to =SSE and other accident loads are. quite small and are effectively zero when compared to those due to hourglassing.

Our table will onlv include manu-facturing and in-service (hourglassing)'. strains and a summation, for, each quantity requested.

The summation is inclusive of operating and accident conditions.

j

TABLE 1 ROLU 1 8 CURRENT HOURGLASSING (UNIT 4) axial

=hoo radial 6e u.

~

~

Mfg.

Column

.177

.004

.040

. 133 86 87 88 89 90 92 H

T H

T H

T H

T H

T H

T H

T

.014

.191

.013

.190

.012

.189

.010

.187

.007

. 184

.004

.121

.177

.177

.008

.012

.009

.013

.009

.013

.008

.012

.004

.008

.003

.007

.004

.004

.044

.004

.044

.004

.044

.003

.043

.002

.042

.001

.041

.040

. 141

., 140

. 140

. 138

. 137

. 134

.133

-133

• No Leg Displacement H Strains due to hourglassing T Total Strains

s

TABLE 2 ROW 1 9 FULL CLOSURE Mfg.

I Column

. 177

.004

-.040 85 86 87 88 89 90 91 92 H

T H

T H

T H

T H

T H

T H

T H

T

.044

.221

.043

.220

.038

.215

.031

.208

.023

.200

.012

.189

.177

.177

.043

.047

. 043

.047

.039

.043

. 032

.036

.019

.023

. 009.

.013

.004

.004

.014

.054

.014

-.054

-.012

.052

-.010

.050

.007

.047

.004

.044

-. 040

.040

• No Leg Displacement H Strains due to hourglassing T Total Strains

TABLE 3 ROW 2 9 FULL CLOSURE Mfg I

Column

~axial

.112

.003

.030

~hop

< a

.085 85 86 87 88 89 90 91 92 H

T H

T H

T H

T H

T H

T

.022

.134

.022

.134

.021

.133

.018

.130

.013

.125

.008

.120

.112

.034

.037

.034

.037

.027

.030

.021

.024

.011

.014

.006

.009

• • PP3

.00

• • P04

. 007

.024

.054

.023

.053

.021

.051

.018

.048

.013

.043

-. 008

-.030

.030

.109

.108

.106

.104

.099

. 093

.085

.085

• No Leg Displacement, H Strains due to hourglassing T Total Strains These strains result from dimensions taken from the removed tubes.

A possible explan-ation is that these tubes had higher ovality, as manufactured, than the statistical average.

~

~

TABLE 4 RON 3 9 FULL CLOSURE Mfg.

c I

Column axial

.082 hoo

.005

.020 85 86 87 88 89 90 91 92 H

T H

T H

T H

T H

T H

T H

T H

T

.015

.097

.015

.097

.013

.095

.011

.093

.009

.091

.005

.087

.082

.018 23

.018

.023

.013

.013

.009

.014

.004

.009

.001

.006

.005

.024

-.044

-.023

-.043

-.021

>>.041

.017

.037

.012

.032

-.006

.026

.020

" No Leg Displacement H Strains due to hourglassing T Total Strains

4

TABLE 5 ROW 4 9 FULL CLOSURE axial hoo Mfg., s Column

.064

.002

.020 85 86 87 89

. H T

H T

H T

H T

.012

.076

.012

.076

.011

.075

.010

.074

.007

.014

.016

.014

.016

.011

.013

.007

.009

.003

.024

.044

.023

.043

.021

.041

.017

-.037

.012 90 91 H

T

.004

.068

. 064

.002

.004

.002

-.007

.027

.020 92

.064

.002

.020

• No Leg Displacement H Strain due to hourglassing T - Total Strain

0

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