ML17244A385

Summarizes Meeting on 790130 Re High Energy Line Break in Turbine Bldg,Criteria for Design of Pressure Shielding Steel Diaphragm & Structural Design of Pressure Shielding Diaphragm in Turbine Bldg

ML17244A385
Person / Time
Site:	Ginna
Issue date:	02/09/1979
From:	James Shea Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
TASK-03-05.B, TASK-3-5.B, TASK-RR NUDOCS 7903050503
Download: ML17244A385 (9)

Text

FEB 8 i97g

/-v Docket Vo.60-244 LICENSEE:

Rochester Gas 8 Electrfc Corporation v

FACILITY:

R. E.- Gfnna Nuclear Power Plant SUBJECT'U%CRY OF Y1EETING HELD ON JANUARY 300 1979 Representatives of Rochester Gas 5 Electric Corporation (RGSE) and the Nuclear Regulatory Cerefssfon (NRC) met fn Bethesda Nary'land, on January 30, 1979, to discuss the following topics regarding the R. E. Ginna Nuclear Power Plant:

't o

High energy leone break fn the turbine building and cr fterfa for the design of the Pressure Shieldfng Steel Diaphragm in the Turbine Bui'tding.

o Structural design of'he Pressure Shielding Steel Diaphragm in the Turbfne Building.

A list of attendees is attached.

ROSE representatives reported that the new Pressure Shielding Steel Diaphragm at selected locations in the turbfne building was designed to withstand 1.6 psig internal turbine bufldfng pressure and the safe shutdown earthquake 0.46g specified at the time the plant was contructed or 1.15 psfg and a safe shutdown earthquake of 0.55g corresponding to Regulatory Guide 1.60 and 1.6't.

The turbine building structural stresses have been conservatively calculated by adding the stresses resulting from the high energy line break fn the turbine building and the resultant pressurfzatfon to those stresses resulting from the design basis seismic event (i.e. high energy line break in turbine building and earthquake are conservatfvely assigned to be noncofncfdent}. It was assumed that the large steam lines in the tur bine building will not fail catastrophfcal'ly pince they are included in the In-Service Inspection {ISI) program.

The licensee claims that anv cracks which could propagate

.through the piping wall would result fn detectable leaks in time to shut the plant down safe'ly wfthout a 'targe re)ease of energy and overpressur-ization of the'turbine building.

The "High Energy Line Break fn the Turbine Building" report to be su/mitted to NRC will include justification for this assumption.

"t'I&Bc5c5CZ OFFICE ~

SURNAME&

DAT2~

NRC FORM 318 (9.76) NRCM 0240 4 U 0 OOVERNMKNT PRINTINO OFFICCI 1020 020 024

4

~,

1

)4

~

'I If I ~

r'

~

v

(

j

'I,

1 v

~

4 R

~

4 1

~

I

~

~

ll~

(

(I Il v

I I

1

~,,",'((

(R I

~ I I )

1 1

I, I

(

I 1

l li 4

n 1

4 'I V

'4 v

It

~ I f

~

II I ~ ~

I I v

~

I

~

1 R ~

f tt I

I

),

~

FR v

1, F

I, t

~

~

tl 7'

I,

),(

'(l r R

IV v

3 I

I 4

~

~

I I ~

'I 7 L (i

4 4

' I

~

'I tl I

F 1

" ~ =,i )

44 QR 1

a I

~ Vf

(,I IR)

R l)7

'I ll F

~ Il tt If R

~

ft IR(

1 vv R

'I\\

I N

ZIF

~ R.

F,F r

,Iv R

MEETING SUMfWRY FEB 9

1979 RGIjlE reported that for the purpose of calcu1atfng high energy releases it was assumed that the break occurred in the,.20 inch feedwater line since this line and a smeller 12" steam 1 fne are not included fn the ISI program.

The licensee reported'that the turbine building pressure resulting from a 20" feedi(ater pipe break peaked fn about 0.29 seconds at 1.14 psfg with initial building air temper-ature of 60'F and relat)ve humidity of 20K.

The corresponding

- pressure peak on the operating level fn the turbine building occurred at 0.86 seconds at a pressure of 0.70 psfg.

The pressure calculatfons included a 1.4 pressure multiplfer to provide a specific margin for design conservatism.

The location of the high energy lines and the possibilfty of missiles that could cause failure of the steel diaphragm walls were discussed, In general these lines and potential missiles are reste relative to the steel diaphragm wa'mls (f.e. opposite ends of the large turbine bufldfng}.

The calculations assum that the b'lock wall adjacent to the turbine building steel diaphragm walls blows out at 0.13 psfq.

The justfffe

'ateon for thfs value and the wall Mow out ca'iculational model are to be provided by the lfcensee.

The pressurization calculations also have an allowance for window openings which must be-/ustified.

Although not included fn the calculatfons ft was reported that alumfnum sfdfng on the turbine building can blow off at 0.93 psig and wfndo>>s blow out at 1.2 'psfg. It is expected that the high energy line break analysis for the turbine building will be submitted for NRC review by the end of February 1979.

Dames D. Shea, Pro)ect Manager Operating Reactors Branch P2 Division of Operating Reactors Attactment:

List of Attendees CC; See next page DOR:0 B 2 JS qyh 2

/79 OR7ICSW SURNAME%

OATSW NRC 2'ORM 318 (9-76)

CM 0240 DOR:ORB¹2 DLZiemann

'.tL7.9...

Q UI $, OOVdRNMSNT PRINTINO OPPICEI IS70 025 S24

H I

H C

N U

I I

~

2 7

II fr' 2

~

v 2

H 2

2 I'"

1 I

I v

wv Q

fiI H

I I

I HI

~

Ir lv D

I Cr 2,

V tl 2

I rfi 2

~

1 D

H H l

I I'

~

C I I

~f 'vf I

~

'W I

~

I I

'\\

r, 2=

11 lilt H 4

fi II

~

~ t W

v I D

v fi'

~

~

~

~,

r t

I I'

~, 'Etr I

I ll Ev II I

HID r II I

vtf I

IL 2

Mr. Leon D.

4!hite, J r.

FEB 9

1979 CC Lex K. Larson, Esquire

LeBoeuf, Lamb, Leiby 8 MacRae 1757'

Street, N. Il.

I/ashington, D.

C.

20036 Mr. Michael Slade 1250 Crown Point Drive

Hebster, New York 14580 Rochester Committee for Scientific Information Robert E..Lee, Ph.D.

. P. 0.

Box 5236 River Campus S.ation

, Rochester, New York 14627 Jeffrey C'ohen New York State Energy Office Swan Street Building Cor 1,

Second Floor Empire State Plaza

Albany, New, York 12223 Director, Technical Development Programs State of New York Energy Office Agency Building 2 Empire State Plaza

Albany, New York 12223 Rochester Public Library 115 South Avenue Rochester, New York 14604 Mr. Leon D. White, Jr.

Vice President Electric and Steam Production Rochester Gas 5 Electric Corporation 89 East Avenue Rochester, New York 14649-

LEST OF ATTENDEES R.

C. Necredy F.

A. Lup)

J.

H. Covey 6$ 1bert Associates.

Inc.

C.

Chen R,

E, Anderson N. S. Kurt)a NRC 7,

Cheng K. N. Qabbour R. 8. Ktesse'}

J. J.

Shea OFFICE&

SURNAMSW DATS~

NRC FORM 318 (9-76) NRCM 0240 Q U, 8, OOVSRNMSNT PRINTINO OFFICSI ISTS 020 124

\\

A

f1EETING SUtSARY DISTRIBUTION:

Docket(GO-244 Local POR ORB82 Reading NRR Reading HOenton E.

G.

Case V. Stello B. Grimes D. Eisenhut D. Davis D. Zlenann P.

Check G. Lainus A. Schwencer R. Reid T. Ippolito V. Noonan

6. Yeighton 0.

Brinkman D. J.

Shea OELD OIIE(3)

H. Smith L. Andrews L. Barrett J.

S. Bland M. Britz J. Collins R.

Emch H. N. Shanbaky, Region I J.

P. Stohr.

Region I R. Fraley, ACRS(16)

, TERA 0,

R.

Buchanan

p 1

t 1