ML20237B559

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Provides Followup Documentation of 871105 Meeting Between G Johnson & W Hazelton of NRC & H & F Askwith of Hafa Intl Re Reduction in Holding Time from 2 H to 10 Min During Instrumented Insp Technique Pressure Testing
ML20237B559
Person / Time
Site: Beaver Valley
Issue date: 12/07/1987
From: Sieber J
DUQUESNE LIGHT CO.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
NUDOCS 8712160349
Download: ML20237B559 (19)
v • d • e


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Teiephone (412) 393-6000 Nuclear Group

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December 7, 1987 on, PA 15077-0004 U.

S. Nuclear Regulatory Commission Attn:

Document Control Desk Washington, DC 20555

Reference:

Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Pressure Testing Hold Time Gentlemen:

This letter is intended to provid2 follow-up documentation of a meeting held on November 5, 1987, between Mr. G. Johnson and Mr. W.

Hazelton of the NRC staff and Mr. H. Askwith and Mrs. F. Askwith of HAFA International regarding a

reduction in hold time during Instrumented Inspection Technique (ITT) pressure testing.

The-reduction in hold time from two (2) hours to ten (10) minutes would apply to testing of portions of the Main Steam, Feedwater and Steam Generator Blowdown Systems shown in the attached drawings.

As a result of the above referenced meeting it was concluded that a

ten (10) minute hold time would be acceptable to the NRC for the ITT testing on the noted lines.

It was determined that the two-hour hold time requirements for insulated systems as described in HAFA Topical Report HAFA 135 P-A could be waived based on the following:

1.

In the course of approximately 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br /> during which time non-nuclear steam pressures are available to pressurize the

lines, leak. tests will be conducted at convenient pressure plateaus up to the maximum operating pressure.

2.

Instrumented and visual inspections will be performed-periodically throughout the test series.

If there are any questions concerning this matter, please contact my office.

Very truly yours, 8712160349 871207' M

W ADOCK 050 g 4 J. D. Sieber PDR G

Vice President, Nuclear Attachment

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Mr.

J. Beall, NRC Resident Inspector

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Mr. W. T. Russell, NRC Region I Administrator Mr. G. Johnson, NRC

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g,J, gggs Mr. W.

Hazelton, NRC Mr. P. Tam, Project Manager Director, Safety Evaluation & Control (VEPCO)

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CALCULATION SHEE'T l

1 Veight o'f Sensor and Attadunchtdis':bassd'?.upon%he Variables; l

A = Pipe Outside Radius (incites) a B = Sensor Standoff Length (inches) f C '= Pipe Insulation Outside Radius (inches) e.

CONSTANTS D = Sensor length + Brace Thickness + Insulator Thickness qEh D = 1.5 inches M

i E = Brace width E = 1.5 inches

/

x.

/x

~\\

e KMA~

  • \\

F=A+B+D

~/ // \\

/

N\\

\\

i

~

if

)i If

-F Band Length (L)

\\

L = 2F + f (2C + E) + (2C - E) 5

\\

/

SutLT Sensor Attachment MtCXTECTMain Steam Acoustics g_

CALC.By:

RPM.<.fm %7pg

INTERNATIONAL INCORPORATED MTe_.,_

-.03.a o.:__

c"r B y '

ATTACHMENT 2 lil.FA F011 110

-CALCULATION SHEEi!

~

l-6k i

i gg

/

\\

Brace Length (H)

/

\\

r 7s.

\\

_t_

4"#

G = Insulation Thickness t

I-G=C-A e = Brace Angle e = 65 H = 2 c0S(90 - 0)(B + D - G) + E Weight Sensor ( W,)- 0.188 lb

( W )= 0.0365 lb/f t L/12 Band 1

Brace

( W )= 0.342 lb/f t. H/12 3

Standoff

( W ) = 0.272 + 0.014 (B - 2.8) g Clamp

( W )= 0.069 lb c

' pro.7 EC T SUB7 cru.c. er. 620'M

$pf,.% l#*fy W

HA.F. A.

y INTERNATIONAL INCORPOR ATED ca.er gy e_,...,

yog go..

ATTACHMENT 2 H1FA 70R'i 160

)

CALCULATION SHEET For example, at Davis-Besse #1 36" EBB-1 Main Steam Line Vall Thicknesp = 1.005" ff A = 19.005 B = 15" (Assumed) ec.

C = 22.0'05" (Assumed G = 3")

D = 1. 5" E = 1.5" F = A + B + D = 35.505"

,s L = 2F + W2-. (2C + E) + (2C - E) A 5 - 150.2" 4F O.0365L = 0.457 lb y

12 G = C - A = 3" 0 = 65 H = 2 __COS (90 -0) (B + D - C) + E = 26. 0" W = 0. 342H = 0.740 lb h

39 W = 0. 272 + 0. 014 (B -2. 8) = 0. 44 3 lb g

+W +W

= 1.897 lb W1+Wh+Ws c

g y,

naecT suaa:

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w HA.F.A.

c ac.a n p (y a gpf;4, v

INTERNATIONAL INCORPORATED 3

_o jyog 9,,,

  • Te cm. en ATTACHMENT 2 FAFA FORF. 160

CALCULATION SHEET i

Materials Band - 304 Stainless Steel Brace - Carbon Steel J

Standoff - Carbon Steel Clamp - 304 Stainicss Steel Insulator - Soft Rubber s

i PROJECT sv33 ;

        • BY' Mm
  • /??6 7 ;Q g CM--

H A.F.A.

,g INTERNATIONAL INCORPOR ATEC cHk bv' e a m.T e.

Joe No.:

ATTACHMENT 2 fAFA F0PM 160 m_______.___________________

J

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