Text

Forwards Addl Info Re Containment Purge & Pressure Vacuum Relief Valves Per Request.Containment Purge Valves Will Be Kept Shut During Operating Modes 1-4.Pressure Vacuum Valves Will Have a 60-degree Stop in Open Direction
	ML18086B351
Person / Time
Site:	Salem
Issue date:	02/18/1982
From:	Liden E; Public Service Enterprise Group
To:	Varga S; Office of Nuclear Reactor Regulation
References
	NUDOCS 8203080463
	Download: ML18086B351 (25)
	v • d • e

e Ps~G Public Service

~

&J Electric and Gas Company 80 Park Plaza, Newark, NJ 07101 I 201 430-7000 MAI LING ADDRESS I P.O. Box 570, Newark, NJ 07101 February 18~ 1982 Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, MD 20014 Attention:

Mr. Steven A. Varga; Chief Operating-Reactors Branch 1 Division of Licensing Gentlemen:

CONTAINMENT PURGE AND PRESSURE -

VACUUM RELIEF VALVES UNIT NO. 2 SALEM NUCLEAR GENERATING STATION DOCKET NO. 50-311 This letter transmits to you~ in its enclosure, additional information concerning the Salem Unit No. 2 containment purge and pressure -

vacuum relief valves.

This information was requested during a telephone conversation between Ms. M. Haughey of the NRC Staff and Mr. R. L. Gura of PSE&G.

Should you have any questions in this regard~ do not hesi-tate to contact us.

FAM:ds Encl.

CC:

Mr. Leif Norrholm Very truly yours,

/~

E./ A. Liden, Manager

/

,1Nuclear L1cens1ng and Regulation Senior Resident Inspector Mr. William J. Ross Licensing Project Manager

. 8203080463 820218

~_PR *. ADO~K. 050~0~A~

--~ '

BM31 The Energy People 95-0942

QUESTION NO.

1.

Will the 36" Containment Purge Valves be kept shut during the operating modes 1, 2, 3, 4?

Reply:

Yes

2.

The 10" Containment Pressure-Vacuum Relief Valves have a 60° stop in the open direction.

Is this change permanent?

Reply:

Yes

3.

(a) What actuator was mounted on the 10" valve during the seismic test?

(b) Why was the resonance search terminated at 25 Hz and not 33 Hz?

Reply:

(a) Test valves were equipped with an actuator similar to the the actual valves; i.e., Bettis Actua-tor Model No. 522C-SR100.

(b) The testing specifica-tion for the valves was mutually agreed upon between PSE&G Co. and the manufacturer.

When the test was conducted in (1975), the testing criteria agreed upon was a resonance search up to only 25 Hz.

Based on research data for the plant, a resonance search up to 25 Hz is acceptable for the location of these valves (El. 123 on the containment wall).

4.

How does the manufacturer define the torque load?

When will the torque loads for an installation differ?

Reply:

The torque coefficient at the 60° open posi-tion for a 10" 32000 series valve is 76.2 in/lbs. per psi tending to close the vane.

Although this value is a combination of dynamic forces and friction, at 60° open it is mostly dynamic forces.

Dynamic torque tests on Butterfly valves are performed with the same installation configuration as would be used to calcu-late capacity.

An important feature of this installa-tion is to allow enough straight length of pipe in front of the valve to develop a fully turbulent pres-sure profile.

An elbow immediately upstream of a butterfly valve will skew the turbulent pressure pro-file so that there is an increase in pressure along the outer wall of the elbow and a decrease in pressure along the inner wall.

4a.

What does the piping configuration of each valve look like?

Reply:

The piping configuration of the valves can be seen on Attachment No. 1.

On pressure relief, the valve outside the containment (2VC5) has a 90° elbow in front of the valve.

On vacuum relief, the valve inside the containment (2VC6) has a 90° elbow in front of the valve.

4b.

Is the design of the vane in the flow direction of the valve symmetrical?

Reply:

Yes 4c.

How does the vane rotate on the shaft with respect to the flow?

Reply:

The valve/vane orientations with respect to the elbow for each pressure -

vacuum relief valve is different.

Valve 2VC5 has an orientation similar to Figure 1 on Attachment 2.

The pressure profile is skewed so as to increase pressure on the bottom of the vane, thus creating more dynamic force tending to close the valve.

Valve 2VC6 has an orientation similar to Figure 4 on.

The skewing effect on the pressure profile of the elbow is balanced on both sides of the vane.

It is believed that this will have little noticeable effect on the dynamic coefficient.

5.

Is a test report available from the manufacturer for data coefficients on their Butterfly valves?

Reply:

Yes, see Attachement 4.

6 (a) What is the distance between the Containment Pressure Vacuum-Relief Valves?

(b) If the first valve inside the containment fails open, what is the dynamic effect on the second valve?

Reply:

(a) The distance between the elbows at the valves is eight feet.

(b) The mathematical analysis performed on the 10" 32000 series Butterfly valves was independant of mounting location.

The criteria for the analysis was the effect a 47 psi pressure differential would have on the valve.

Therefore, there is no dynamic effect on the second valve.

7.

What is the effect of including the seismic loading with the dynamic loading on the failure analysis?

The original seismic testing performed on these valves (Attachment 5) included an operational requirement before, during, and after a seismic event.

Vibration testing was performed with the valve in the open and closed position.

As shown by the original failure analysis (Attachment 6), the critical loading is the shear pins in the seated position.

The seismic test duplicated closed valve operation with the exception

of the 47 psi pressure differential across the vane.

This pressure differential does not increase the loading on the shear pins.

8.

What is the effect on the failure analysis of combining loading by the actuator and differential pressure?

Reply:

An updated analysis is attached (Attach-ment 7).

A conservative approach of using direct addition of both stresses was adopted.

Combined loading increased the stress on the shaft by approximately 11%.

An adequate margin of safety of 0.95 is still realized.

Shear loading on the pins is not increased over pre-vious analysis (Attachment 6, Page 2.3).

9.

What is the effect on the shaft caused by the torque loading at the shear pins?

Reply:

The design criteria for a pin joint is for the minimum strength element to be the shear pin.

A shaft failure would require a complete tear-out of a double circular section on either side of the pin.

Such a failure before the shear pin highly unlikely.

Attach-ment 8 is an analysis for tear-out conditions showing the margin of safety to be large.

10.

Do the Containment Pressure -

Vacuum Relief Valves have handwheels?

Reply:

No.

JEF:sjc Attach.

2/11/82 JF 04 02/04A

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Tes.t Report No~

11262 No. of Poge:s __

8 __

.Report of Test on SEISMIC-VIBRATION OF

. ( 1 ) l O", ( l ) 2 0 11 and { 1 ) 3 6 11 B LI TT ER FLY *

VALVES FOR

....

MASONEILAN INTERNATIONAL, INC *

. *.*.. -UNDER

* **PURCHASE ORDER NO. f36088

.. : :.. ~: ; -*... -:*..

... :.. ' ~.*

~--.**

.. - By:,_-

Sig~*ed Dote

--.... ~ -~.

.. Prepared R.Gilfoy

f(..:/i~/7.

I

.2'7Jaf6'"

ML T: RG/ hmf..

TESTING CORPORA 110N Ch~ked Approved C.Pilotte M.L.Tolf c~*IZI~ Jn.ii

~.,

I u~

- J.70d 1'S-*

i)/t- '7i~u_.;-

Administrative Data L 0 Pur~s:e. of Test:

Qualification *seismic vibration testing of one 10 11,

one 20 11 and one 26" Butterfly Valve for Masonei-1 an International, lnco 2 *0. Mam:Fccturer:.. Masoneilan International, Inc.

(1) 10 11, Hodel 69-32200 3.o**tkoufocturer's--TypeorModelNo: (l) 20 11,

Model 7*1-32112 (1) 36 11

, Model 69-32206 Butterfly Valves 4 Q Drc:-wing;'-SpPcjfkatjooor Exhibit: Ma.soneilan International, Inc.

Seismic Test Procedur~ No.NE 115.

> *** * *: -.:_ -~~: ~~*.... ::- *****

' : ~-..

- *.**.::~-~~ ~-!..

-_; * *.*- :-.*<*~*~tI :: *

.; ;---:* ~-.~ -:::.-:;

5. 0 Ouaritity of lte-ms Tested: *.

6 0. S~c1,rl ~\\:ja<.sfri~ctj ~n of Items*

. *. ~.....

.. *.. ~*... :*,. :.

z.o Pa.te 're;*t C~ptet*e'd; Three**-(3)

(1) 10 11 (1) 2 0 II I None October lls 197E D.M~~ay~hlin C. Pilotte

( 1 ) 36 II Returned to Masoneilan International,

* * :-:-;.:~:;,~:::.. * *.

I n c-.. *

-JO.o, i~f;~iU

-r~~:~ was no ev i den,ce of mechanical damage or

. ~<-* __

- deter.ioration to any of the. three Butterfly

\\::_.~._-: _-_

Valves* subjected to the seismic vibration test

*specified in para. 2.cr below.

.. ~-.

. *. : ~..

'~- 1126 2 l

Pcge ___ _

Report No.------

1.0 TEST REQUIREMENTS The Masoneilan International Butterfly Valves, 10" Model 5 9 - 3 2 2 0 0, 2 0 11 Mo d e 1

71 - 3 2 1 1 2

a n d 3 6 11 Mo d e 1 6 9 - 3 2 2 0, a re tequired to pass the seismic vibration test specified in para. 2.0 without evidence of ~echanical damage or deteri-*

oration.

The valves shall be pressurized during the seismic

~ytbration*test: Responses of the valves shall be monitored

.*during the simulated seismic event.

2.0 TEST PROCEDURES The* +tasonei~i"an *10 11 Butterfly Valve, Model 69-32200, with

-~asaneilan Mddel 496 switch, was mounted to a test fixture.

Th e te.s t f i x t ti re / t e s t i t em a s s e m b 1 y w a s mo u n t e d t o t h e

- mo v i_n ~. : t ~ b 1 e ~ of ~ h e A := to ~ E n v i r o n me ~ t ~ 1 Te s ti n ~ C a r ~or a ~ i o n

, (AETC) single axis se1sm1c test fac1l1ty for v1brat1on 1n

. *the ii de-to"". s*i de ax i s.*

F'o~r (4) str~*i*n gages* were mounted to the valve in the

_** fo1.l.:'6~~ng.1ocatio'ns:

~~-: :.....

... *.::*.* 1.~*right.si.de of gear housing sensing side-to~side

.... -~- : -

~:.. *-.*

~: ~ ~*1~~~ side of gear hou~ing sensing side-to-side

. 3 "".butterfly. housing limit swi.tch end front-to-back

~;><.. 4 :..:~co.upling between gear and valve housing sensing

*n ~:.. ;.* *_. v e rt i c a 1

. ; ~A : h ft'~ o a e n.i' i n e \\'I a s co n n e c t e d t o t h e v a 1 v e to p re s s u r i z e th e

.:*:*valv.e:-. to 50 psi. _A ~econd nitrogen line \\':as connect..:cl to the.'*"actuator inlet to pressurize the actuator to 90 psi *

... ~- --._.'. -~~-~:~.:-:~- -~~- - : ~.:.. '.:. ;__

,.se'v*e-n:*.**(7).~ac'celerometers \\~ere mounted to the valve as follows: *

.. I

,_., ~~*:*::~;\\ifL~~:;;~.~:* :. * -* *" :

. **->*~~.

Report No. 11262 2

Poge ___ _

1 I

r.:.::.:.:::::

I.

I

\\..

ACCELEROMETER NO.

1-2-3 4-5-6

-~.

I LOCATION Tri axial group with Cl-vertical~ #2-side-to-side and #3-front-to-back, mounted on the top of the accessory bracket

T~iaxial group with 14-front-to-back, #5-side-to-side and #6 vertical, mounted on the *bottom side of gear housing Control - at the interface of the valve t e s t f ;* x t u re The* outputs. of al 1 four {4) strain gages and al 1 seven (7)

"acc~}arometers were displayed on oscillographic recorders.

Th~ re~onance survey of this valve and all subsequent valves was performed* with the valve in the OPEN POSITION.

.. :The.fo116wing.res6nance survey wa~ performed:

l....:_2SHz*, o_.2g 1 s peak; l octave/minute sweep rate.

--:.F o l 1 ow i n g c o mp 1 e t i o n o f t h e re s o n a n c e s ti r v e y, s i n e b e a t

.vi~ration tests were performed at all resonance surveys at a test-. level of 3.0g 1 s peak_.

~ 5 b~ats,* lO_cycles/beat with the VALVE OPEN and again with

- - the.VALVE CLOSED; or if no resonance were found, at l.Og's p e a k,

5 b e a t s, 1 O c y c 1 e s / b e a t vii t h th e VAL V E 0 P E N a n d a g a i n

. wtth"th~ VALVE. CLOSED.

:*.. Fol.lo~i-ing complet_ion of the. resonance survey and sine beat

.** vi-bration test.in.the side-to-side axis, the test fixture/

_-test.item."assembly was rotated on the AETC test facility for

.* vibration** in. the front-to-back axis.*

~At~~~-e~om~ters_.. an~ ~train gages remained in the same posi-

. ~ *-ti6.n< and the* above specified test was repeated.

~~lloWin~* co~pl~tion 6f the resonance survey *and sine beat vi-b.ration test in the-*front-to-back axis, the test* fi-xture/

.ReportNo. 11262 Pcge_*_3 __ _

.. I*

test item assembly was remounted for vibration in the vertical axis with all accelerometers and strain gages in the same locations and the above specified test was re-peat~d in the vertical axis.

After completion of the above series of tests on the 10 11 Butterfly valve, the above specified test series was re-

.. __ pe~ted on the 36 11 Butterfly valve and 20 11 Butterfly valve *

. Stra:.irr gage -and accelerometer locations for the 36 11 Butter-fly va.lve were p_ositioned as follows:

1 - Sensing vertical front face gear actuator*housing

~-2.:-sensing vertical back face gear actuator housing Se~sing vertical limit end of va1ve side housing

. *: * ~ 4 Sens i n g. fro n t - to - b a ck 1 i mi t en d of v a 1 v e s i de h o u s i n g

- . :-:.:.... *s - Sensing front-to-back top of valve side housing

. * : '.:-_ '~~: :* 6*" -

Se h Si 0 g S i de - t 0 - S i de t_O p 0 f V al Ve fr 0 n t h 0 LIS i n g Sev~~~'x(7) ac~ele.rometers were mounted as follows:

-ACCELEROMETER NO.

1~2-3

.:.:~

- . *-::.:*.'.. -=*-<

.~.

- - .*;,4~.5~6 LOCATION In a triaxial group with #1-vertical;

2-front-to-back; #3-side-to-side -

on

.the.bottom side of the collar between the valve and actuator.

In a triaxia1 group with #4-vertical;

5-front-tu-back and ~5-side-to-si~~ on

.*,.~the top side of the actuator gear housing.

.. *. *.:*~~~"*T<...

Control *- -mounted on the interface of the*

.:0-;~{/"<**

test ite.m/test fixture assembly.

- .. < -.~:,

-.. **_: -<:*.. -~:-...:-:~?-~:-***:.*.. >

-~100:.-~p.si ai*r was supplied to the actuator in1.et.

The valve was p'ressuri-zed**ta 15 psi.. The valve \\*/aS operated before, du r i'n g

a n d. a ft e r th e s i mu 1 a t e d s e i s mi c e v e n t.

Report No. ----'-1.-..1=2.;;...6.;;;..2_

~~R'CHMEN'TA1..

~~

TESTING TON -:-

Po9e __ 4 __

CORPORATION

---~.

The tests specified above for the 10" valve were performed on the 36 11 valve.

Following completion of the resonance surveys and the sine b.e a t v i b r a t i o n t e s ts o n

th e 3 6 11 v a 1 v e, th e 2 O " Bu t t e r f 1 y valve was mounted to its test fixture and the _test.fixture/

-test item assembly was mounted to the moving table of the AETC seismic test facility.

Four* stra"fn.. -gages* \\*1ere mounted to the valves in the fo11ow-

imi locations::

l -- Se n sf n CJ

v e rt i c a 1 by th e s u p p o rt b r a ck e t o n th e

. -~--Ho

l s i d e 2 - Sensing vertical - actuator end of No. 2 side

of the valve Sensing vertical side

bottom of yolk on the No. 3

. *:*:::<:-:~-,~/'.**4 _;:..,_s*e:n.sing vertical - to.the front of the No. 4

... *,:**(*....... 'side~**

Se~~~-

accele~om~ters were mounted to the valve in the

_*following l oca ti ans:

.. _. AC C El ER 0 M ET ER_.. :

NO..

LOCATION

~~~~~~~~~~~~~~~~~~~~~

l*-2-3

~In a tria~ial g~oup with #1-vertical;

':,, * :... #2-front-to-back and #3-si de-to-side on

-the mounting plate for.the actuator near

.- *. :-. ;* mo u n ti n g b o 1 t -..*

._*._-:;.--*:~~:. -~..

-.--:--~.....

\\.

. -..:. *-*.A.~ sL5_...

._. -~- *.

fn *a tiiaxial* group with #4-vertical;

5~front-to-back and #6-side-to-side

** --* midway on yolk housing

):~:-::

1

~:. :*.........

. : t 6 n t r 0 1 a n d "w a s m 0 u n t e d a t th e i n t e r fa c e

__ :::*<<~..

of the test fixture/test item assembly *

. -~

11262 Rep:>rt No.------

5 Pcge ___

~====~-~*----'-------------

- --*=--~~

0-20 psi nitrogen was supplied to the actuator to operate the valve.

15 psi was supplied to pressurize the valve.

The 20 11 Butterfly valve was operated before, during and after the simulated seismic event.

The test specified for the 10" valve was re-performed on "the 20 11 valve~

3.0 TEST RESULTS

.= ** -.

~-ciurfrig the resonance ~urvey in the side-to-side axi~ of

-the 10-" vaJ_ve, a resonance was detected at 13 Hz.

Sine

~beat vibration tests w~re performed in the side-to-side

_ ax i s:-*:*o n the *1 O 11

_ v a 1 v e at 1 3 Hz at a 1 eve 1 of 3

0 g ' s peak.

-. 0 U ~f n g th e* -re $ Q.n a n C e S U r V e y 0 f th e., 0 II V a 1 Ve i n t h e

_-_front"".to-back axis, a resonance was detected at 17 Hz.

~*

.Sine--~eat :vib.ratioii tests \\>Jere performed on the 10 11 valve*,

i n :: the -fro n t ~to --b a ck ax i s at 1 7 Hz, 3

O g 1 s p e a k *

. _;-> ~.---.:-

No:.resonance.*of _the 10 11 valve were detected during the

_ _ _ re s on a n c e s u r v e.y i n th e. v e rt i c a 1 a x i s *

..-~ -...

Siri~-~beai~vi6~atfon tests w~re performed on the 10" valve in_the v~rtical axis at 25 Hz, 1.0g's peak *

. -- There was'*-noevidence of damage or deterioration to the

,-0 1_'.,:~utterfly*valve as -a result of the seismic vibration*

~,.te-st-specified in para. 2~0 above.

The valve o_perated

_ : > p r o p e r 1 y. b e f o re,

d u r i n g a n d a _ft e r th e s i mu 1 a t e d s e i s mi c

e v e n t *. * - *:. :. -:

~:.~:~~~ ~(:"{<** ~.

. ~-

. --. Du_r._irig *-_the *reso_n*a~ce* s*urvey in the side:--to.:..side axis of the=36 11

~utt~rfly valve, a resonance was detected at 13 Hz.

___ si.n'~'.beat.vibrati.on* tests were performed on the 35u Butter-f 1 Y- --~.-v a 1 v e._ i n th e s i d e - to - s i d e a xi s a t l 3 Hz, 3.. 0 g ' s p e a k *

-~. :'.

7 ***

Ou~i~~*the ~eso~ance surve~ in thi front.:..t6-back axis on t.h*e-3.6 11 But.terfly valve, no resonances were detected.

Re~rt No. _,_1_1 _2_6_2 __

Page __

6 __

E******

~******

Sine beat vibration tests were performed on the 36" Butterfly valve in the front-to-back axis at 25 Hz, *1.0g's peak.

During the resonance su~vey in the vertical axis on the 36" But~erfly valve, no resonances were detected.

Sin~ beat vibration ~ests. were performed on the 35" Butter-

fly valve in the vertical axis at 25 Hz and l.Og 1 s peak.

i Ther~ was no evidence of damace or deterioration to the

:36". Butterfly valve a~~ resuit of the simulated seismic

-~vent~

The valve operated properly before, during* and *

~after the simulated seismic event.

D~~fng th~ resoriance survey in the vertical axis on the 20"

=Butterfly valve no resonances were detected.

Sini~beat vibrati~ri tests *were performed on the 201t Butter-fly _valve in th~ vertical axi~ at 25 Hz and 1.Og's peak.

Du r i n g the. re s o* n a n c e s u r v e y i n th e s i de - to. - s i de a xi s w i, th the 20" Butterfly v~lve, a resonance was detected at 20 Hz *

. Sine:biat vibration tests were performed in the side-to-side' axis--on the 20" Butterfly valve at 20 Hz and 3.0g's peak~

-Puting the ~esonance survey in the *front-to-back axis with

./ th e, *:' 2 O 11 Butte r f 1 y v a 1 v e, re s o n an c e s we re d e t e ct e d at 4

5 Hz ancL 14 Hz\\.

Re?'rt No. __ 1_1_2_6_2 __

7 Peg a __ __,__

TEST EQUIPMENT LIST MFGR.

MODEL SER.HO.

RANGE-ACCURACY INV.I CAL.* FR NJ\\ME

~------------~------------*m*-~m*--*-*-*------~-*****-------------~-**-****-**-----****-**-*----*****

Hydr~u11c Actuator Controller Vis1corder MTS MTS Honeywell Sweep Oscillntor SOY Tone Burst Gen.

GRC VTVM HP Scope,Storage

.Tektronix

. V1s1cor~er Honeyw~ll Power Supply i'\\cceleromcter Accelerometer Accelerometer Accelerometer

I Accr.l erome ter

Accelerometer Accelerometer Power Suoolv

~ack I

,, ~~c11 la tor BUBR PCO PCB PC 13 PCB PCB_

PCB ':

. PCO PCB HP 204.635 443.115 906 9-5235 so-104.;.5 21A

.*, 1396 1052 403A 564-11582 906C

. 9-9078' 506/16.

322 302A 1 666

. 302A 667

302A

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302A 669

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483f,

299

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2028 397 DC-300Hz, 25K force lbs *.

25" DA mllX.

DC to 20&0 Hz DC -

.2 Ki'.z 12 channel 0,005 llz - 50 KHz DC

... 2 MHz I

10 ff z -

~ MHz, 0-300V 12 range~.*

DC to 10 MHz

.. DC to 2 KHz 12

+15 _vbc,.*1_.ADC 0.25 Hz/...*. *5 *.KHz

channel,

+2%F

+5%A PE367

+1%

PE367

+1 DB I RE332 3 mont

!:.1 %

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+3%

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