Text

Response to Request for Supplemental Information Re Steam Generator Tube Integrity
	ML18227D286
Person / Time
Site:	Turkey Point
Issue date:	01/21/1977
From:	Robert E. Uhrig; Florida Power & Light Co
To:	Lear G; Office of Nuclear Reactor Regulation
References
	L-77-30
	Download: ML18227D286 (11)
	v • d • e

NRCFoAM 195 U.S. NUCLEAR REGULATORY COMMISSION I2.7S)

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FLORIDAPOWER & LIGHTCOMPANY pr tLlegulato5 Docket. I'ILe 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

Dear Mr. Lear:

Re:

Turkey Point Units 3 and 4

Docket Nos.

50-250 and 50-251 Steam Generator Tube Integrity Su 1cmental 'In'fo'rma't'io'n 9

1 cQ CP~%4'4 The attached information is submitted in response to a request from your staff. It 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 II Robert Lowenstein, Esquire me~

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ATTACHMENT'urkey Point Units 3 and 4

Request for Information Steam Generator Tube Inte 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.

Clari'fication 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.

N A13. 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)'trains and'a summation for each quantity requested.

The summation is. inclusive of operating and accident conditions.

TABLE 1 RON 1 9 CURRENT HOURGLASSING (UNIT 4) saxial 6

hoo radial 8e u.

~

Mfg.

Column

.177

.004

.040

.133 85 86 87 88 89 90 91 92 H

T H

T

.014

.191

.013

.190

.012

.189

.010

.187

.007

. 184

.004

.121 7

.177

.008

.012

.009

.013

.009

.013

.008

.012

.004

.008

.003

.007

.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

I

TABLE 2 ROW 1 9 PULL CLOSURE Mfg.

Column

.177

.004

.040 85 86 87 88 89 90 H

T H

T

.044

.221

.043

.220

.038

.215

.031

.208

.023

.200

.012

.189

. 043

.047

.043

.047

.039

.043

. 032

.036

.019

.023

.009

.013

.014

.054

.014

-.054

.012

-.052

.010

.050

.007

.047

-.004

.044 91 92 H

T

.177

.004

.040

-.040

No Leg Disp1acement H Strains due to hourglassing T Total Strains

TABLE 3 ROW 2 9 FULL CLOSURE

~axial

<hoo

< a Mfg Column

.112

.003

.030'085 85 86 87 88 89 90 91 92 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

- pp4

.007

-.024

.054

.023

.053

.021

.051

-.018

.048

-. 013

.043

-. 008

.030

.109

.108

.106

.104

.099

.093

.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 ROW 3

9 FULL CLOSURE Mfg.

c I

Column axial

.082 hoo

.005

.020 85 86 87 88 89 90 H

T H

T

.015

.097

.015

.097

.013

.095

.Oll

.093

.009

.091

.005

.087

.018

.023

.018

.023

.013

.009

.014

.004

.009

.001

.006

.024

.044

-. 023

-.043

-.021

-.041

.017

.037

.012

.032

-.006

.026 92 H

T

.082

.005

..020

," No Leg Displacement:

H Strains due to hourglassing T Total Strains

~ ~

~

4

~

TABLE 5 ROW 4 9 FULL CLOSURE Mfg.. c Column axial

.064 hoo

.002

.020 85 87 89

.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 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

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~

K, 1

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ML18227D286

Text

Dear Mr. Lear:

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