ML20063C206

Forwards Responses to Seismic Qualification Review Team Addl Questions Re BNL Review of Seismic Qualification of Diesel Generator Neutral Grounding Resistor & Hydrogen Analyzer Panels

ML20063C206
Person / Time
Site:	Summer
Issue date:	04/28/1982
From:	Nichols T SOUTH CAROLINA ELECTRIC & GAS CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
NUDOCS 8205040595
Download: ML20063C206 (73)

Text

-

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0 south CAROLINA ELECTRIC a gas COMPANY 4

post orrect som 7s*

/

Sg COLUMe:A, south CAROLIN A 29218

[

h T. C. Nicwots. J a.

t3 b82A April 28, 1982 9 884%

Vics Petsiormt ano Gaoup Ennur=

Nucttas 0,anavn>=s Mr. Harold R. Denton, Director g

Office of Nuclear Reactor Regulation p

U. S. Nuclear Regulatory Comission A gg Washington, D.C.

20555

Subject:

Virgil C. Sumer Nuclear Station Docket No. 50/395 S@T-Additional Questions

Dear Mr. Denton:

In follow-up to NRC questions regarding South Carolina Electric and Gas Conpany (SCE&G) Seismic Qualification Review Team (S@T) sheets, SCE&G hereby provides responses to previously requested information concerning the Brookhaven National Laboratory (BNL) reviews.

Attachment I, provides the latest response to INL questions regarding the seismic qualification fo the Diesel Generator Neutral Grounding Resistor and the Hydrogen Analyzer Panels. Attachment II provides a cmprehensive listing of all previous SCE&G responses accepted by BNL on Virgil C. Summer Nuclear Station equipnent.

In addition, the NRC staff requested a clarification of the previously supplied S@T sheets for the Core Subcooling Monitor cabinet as transmitted to the NRC on October 6, 1981. Specifically, the S@T sheets provide for the qualification of the cabinet structure and all internal electronics as listed in Table 1 (attachment to S@T sheets).

SCE&G cmsiders this letter to provide a final resolution to all NRC/BNL questions regarding SCE&G supplied S@T sheets.

If you have any questions, please let us know.

Very truly yours, T. C. Nichols, Jr.

SHB:'ICN:Ikb Attachment cc: See Page 2 bI I(

B205040595 820428 PDR ADOCK 05000395 PDR g

A

l Mr. Harold Denton April 28, 1982 Page 2 cc:

V. C. Simner (w/o attachment)

G. H. Fischer (w/o attachment)

I H. N. Cyrus T. C. Nichols, Jr.

(w/o attachment) i M. B. Whitaker, Jr.

J. P. O'Reilly H. T. Babb D. A. Nauman C. L. Ligon (NSRC)

W. A. Williams, Jr.

R. B. Clary O. S. Bradham A. R. Koon M. N. Browne G. J. Braddick J. C. Ruoff J. L. Skolds J. B. Knotts B. A. Bursey NPCF File

Attachnent I Denton Ietter April 28, 1982 RESPONSE TO SQlT CONCERNS EXPRESSED BY BNL 1.

Diesel Generator Neutral Grounding Resistor:

In the original review BNL requested an evaluation of the effect of the dimensional differences on the dynamic response of the contract resistor as conpared with a similar resistor that was actually tested.

In response to this request an evaluation was made to show the possible differences in natural frequency between the tested resistor and the contract resistors. This evaluation also showed that the available test data was adequate to justify acceptance of the contract resistors even when considering the differences in natural frequency. However, the presentation of this evaluation with respect to the vertical axis of the resistor was smewhat ambiguous.

Therefore, BNL requested a clarification of the acceptability of the vertical response of the neutral grounding resistor.

SCESG cmsiders the contract resistors acceptable because the test input acceleration was several time higher than the required input acceleration.

Specifically, the required ZPA acceleration, for the vertical direction, is 0.173g; the minimum test input acceleration was 0.65g between 1 and 25 Hz.

Thus the test resistor experienced accelerations several times higher than it would experience even if the natural frequency of the resistor corresponded to either of the peaks of the required response spectra.

Therfore, the contract resistors are acceptable even though their natural frequency (in the vertical axis) may be different from that of the tested resistors.

The discussion of danping in the previous response was intended to be supplemental to the rationale that the test accelerations were several times higher than the required acceleration, and the acceptability of the contract resistors does not depend on this discussion of danping factors.

2.

Hydrogen Analyzer Panels:

The following provides the methodology used by SCE&G and the Architect Engineer, Gilbert Associates (GAI) which provided the basis for the acceptance of the C msip Reports 1035-1, 2, and 5.

A) The hydrogen analyzers were qualified by Engineering Analysis and Test Capany, Inc. through a cmbination of test and analysis. As sunmarized on page 68 of Comsip report 1035-2, force vibration tests identified resonant frequencies of 29.6 Hz along the lateral (Y-direction) axis were and 19 H:: along the longitudinal (X-direction) axis. No resonances were found in the vertical direction. The accelerations at the resonant frequencies were then used in the static analysis as shown on page 23 of 4

Attachment I Denton Ietter Page 2 April 28, 1982 report 1035-2. The couponents within the hydrogen analyzer were qualified by vibration testing as subunits and then as an assembled panel. The attached revised SCRT sheets provide a clarification of this qualification.

B) As identified in paragraph 4.6.9 (page 8) of Ccmelp report 1035-1, all instruments were energized (as applicable) during the performance of the seismic tests and their output responses monitored throughout the test.

This data is not included within the test report, but this is considered acceptable since the hydrogen analyzer is not required to operate during a seismic event.

C) Data for the functioning of the hydrogen analyzers before and after seismic testing is provided in Table C-II on page 25 of report 1035-1.

In Table C-II, run 4 represents pre-seismic test data and run 5 represents post-seismic test data. SCE&G and GAI have reviewed this data with Comsip and have concluded that this table provides acceptable sumary results to demonstrate the capability of the Hydrogen Analyzer Panels to function before and after seismic qualification testing for the Virgil C. Sumer Nuclear Station. As stated previously, these panels are not required to function during a seismic event, but must be capable of functioning after such a design basis event. The attached revised S(ET sheets provide a clarification of this statement.

Qualification Sumary of Eauioment V. C. Summer Nucleqr I.

Plant Name:

Station Tyoe:

~

1.

Utility:

scE&c PWR X

ONE 2.

OSSS:westinchouse _

3.

A/E: _ G AT II Component Name' Hydronen Annivzer and Ahn1vver Romnea an**mi o,-m1

[x] 'B0P.

1.

Scope: " [ ] NSSS.

2-Analyzers

2.. Model Number:

K-III Quantity: 2-Remote Contro 3.. Yendor:

Comsip, Inc.

7, 4..

If the component is a cabinet or panel, name and model No. of the

' ~

devices included:

See Attached " Bill of W earfn1=_" Anenmone

1. 05450, Rev. 1..

earance Free Standing Panels App'W x 30"D x 72"H 5.

Physical Description a.

Analyzer -

Remote Contr61 - 24"W x 30"D x 60"H b.

Dimensions Analyzer - 1,470 lbs c.

Weight

. Remote Control - 96.4 lbs XPN-7215A - Aux. Bldg. XPN-7258A - Acx. Bldg.

6.

i.ocation:

Building: XPN-7215B - Fuel Bldg. XPN-7258B - Aux. Bldg.

11 - 463' - 0" Elevation:

XFN-/215A

~ N#2 7.

Field Mounting Conditions [X]. Bolt (No. 6

, Size s /n)

[] Weld (Length

)

XPN-72585

~

c

[X) Polt (Nn. 8. R 4 v o. 1/4" Dia.).

XPN-7258B i-Natural Frequencies in Each Direction (Side / Side, Front /Back, Vertical')

8.

S/S:

19 Hz (x)

F/B:- 29.6 Ez (Y)

Y: No Resonances

~

9.. a'.' F.unctional

Description:

Analyze hydrogen. concentration of reactor

' building atmosphere post-accident.

b.

Is the equipment required for [ 3 Hot Standby []

Cold Shutdowr

[.*]

Both None 10.

Pertinent Reference Design Specifications:_ SP--702

III.

Is Eouioment Available for Inspection in the Plant:

Ex]

Yes

'[ 3 No IV.

Eouipment Oualification Method':

Test:

Analysis:

Combination of Test and Analysis:

yes Engineering Analysis and Test Co., Inc.

Test and/or Analysis by 1035-1, 1035-2, 1035-5 (Rev. 1)

(name of Company or Laboratory & Report No.)

Y.

Vibration Inout:

1.

Loads considered:1.[x] Seismic only 2.[ ] Hydrodynamic only 3.[ ] Explosive only 4.[ ]

Other (Specify) 5.[ ]

Combination of 6.

Method of combining RRS:

['x] Absolute Sum [ ] SRSS { ](other; specify) 2.

Required Response Spectra (attach the graphs):

3.

Required Acceleration in Each Direction:

S/S =

.501 g F/B =

.501 g y='

.501 g VI.

If Qualification by Test, the'n Comolete:

[x] random 1..

[ ] Single. Frequency

[ X]. Multi-Frequency:

[ ] sine beat

-[ ]

2.

[ ] Single Axis

[x] Multi-Axis 3.

No. of Qualification Tests:

OBE s

SSE i

Other

' (specify) 4.

Frequency Range:

.35 Hz to 35 Hz 5.

TRS enveloping RRS using Multi-Frequency Test [x] Yes (Piot TRS on RRS graphs)

C-] no 6.

Input g-level Test at' S/S,

2 g's ZPA pfg =

2 g's ZPA y = 2 g's ZFA-7.

Laboratory Mounting: Normal mounting attachments 1.

[ ] Bolt (No.

Size

)

[ ] ',leid (Length

)

[]

8.

Fur.ctional operability verified:

[X] Yes

[-] No

[ ] Not fpplicable 9.

Test Rest 11ti inclu' ding modifications made: The test demonstrates the adequacy of the H Analyzer to operate before and after the application of the R.R.S.

2 i

10.

Other tests perfomed (such as fragility test, including results):

j Pump motor tested in accordance with Reliance Electric Company Report NUC-9 i

dated July 1, 1978.

(Sce SQRT forn for Reliance Fan Motors, PO 10222).

_qz.

k.

VII.

If Oualification by Analysis or by the Combination of Test and Analysis, then Comol ete:

For Rack and Local Panel 1.

Description of Test including Results:' Forced Yibration Test defining Resonant frequencies of 29.2 Hz (X) 34.4 Hz (Y) and 34.4 !!z (Z) 2.

Method of Analysis:

[X3 Static Analysis

[ ] Equivalent Static Analysis

-[ ] Dynamic Analysis: [ ] Time-History

[ ] Response Spe'ctrum 3.

Model Type:

[ ] 3D

[ ] 2D

[ 31D

[ 3 Finite Element

[X] Beam

[ ] Closed Form Solution

'~

4.

[ 3 Computer Codes:

Frequency Range and No. of modes considered:

[X] Hand Calculations 5.

Method of Combining Dynamic Responses:

[ X) Absolute Sum ['3 SRSS

[ 30ther: (specify) 6.

Damping:

5%

Basis for the damping used: Not Available

. 7.'

Support Considerations in the model: Bolted 8.

Critical Structural Elements:

Governing Load or Seismic Total Stress A.

Identi fication-l.ocation -

Response Combination Stress Stress Allowa Rack Mounting Bolt tensile 2966#/ bolt 2966#/ bolt 4520:

shear 478#/ bolt 4780/ bolt 3070r Local Mounting Bolt tensile 65#/ bolt 65#/ bolt 634i Panel shear 26.3#/ bolt 26.3#/ bolt 490l Effect Upon Functional B.

Max. Deflection Location Operability Not available

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6 7 8 9 10 20 30 FREQUENCY

( CPS ).

. {' '

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COMSIP, INC.

WHITTIER, CALIFORNIA 80054 BILL OF MATER'IALS DOCUMENT NUMBER 054 50 REVISION 1, MAY 7, 1981

.a POST-ACCIDENT ANALYZER SYSTEM VCS NUCLEAR STATION SOUTH CAROLINA ELECTRIC AND GAS COMPANY PURCHASE URDER NUMBER Q2625-84 CLASS lE HYDROGEN ANALYZERS 6

PROJECT MANAGER r2ddv2f, !

DATE

[~M-f ouAt1*Y ASSuaANCE //

5-/2-3/

oATE

/ /

y r

(

Documant 05450 May 7, 1981 Page 2 of 8 LIST OF REVISIONS PROD.

PROJ.

REVISIONS DESCRIPTION MGR.

MGR.

Q.A.

1 "As Built"

/., /d "st.

,/

~

05(.60

,..y o.

nu t.

3 g

owG. tio.

l roR K-III POST--LOCA '

IlYDROGEtt MOtJITORItIG SYSTCH ItUV.

DATE BY DCS EllG.

~l'l!Q D. 1 QTY.

IIATERI AL CEP.TIFICATE TEtt PER JHBER SYSTEM EQUIPMENT DESCRIPTION REOUIltED:

~

I 1

2 API, mdl. no. 7045-115-4702-0000, Indicating meter.

Range: 0-200pA, blank scale, (Comsip, Inc. fabricates the t 11 scale).

2 Dody: GR.303SS t

2 2

ASCO, mdl. no. TitT-82G2C711, 2-way solenoid valve.

tiormally closed, 1" tiPT, SW h H

120VAC., GOllz. l (ncogent-Calibration)

Insulation: Class 11 Dody: GR.303SS 3

1 ASCO, mdl. no. TitT-0262A13011, 2-way solenoid valve.

tiormally open, 1" 11PT, Seals: Ethylenc Propylenc 120VAC., 60liz., (Reagent gas pressure relief)

, Insulation: Class il Scals: Viton 4

1 Drooks, mdl. no. 1350-VR-2-15D, Flowmoter.

Scale 196A, Tube; 0-65mm.,

pg

.gg,33ggg Ranger 20-250 ccm (air), (Analyzer bypass)

Fittings: GR.316SS Cinch-Jones, mdl. no.'s TS-G-141 and TS-12-141, G point and 12 point 5

2 tenninal strips, respectively.

Dody: ASTil-A240, GR.304 6

1 Domsip, Inc. mal. no. 11719,floisture Separator.

(Comsip, Inc. modifics a

~

Pittings: ASTil-A479, GR..

Armstrong mdl. no. IlAV for this cervice).

i I

i

05th PAGc 4

'J f

I DWG. No.

[

ron j

K-III POST-LOCA liYDRoGtN tionnoRING SYSTEM g

acv.

Jourc By DCs-lLic.

Ivi:oo.

g QTY.

ti pcn MATCRIAI, CCP.TIFICATC

,0cp SYSTEtt EQUIPHENT DESCRIPTION REOUIRED:

I Motor: Cortified to IEcc-3 9

1

'Comsip, Inc. mdl. no. 11706, Sample Pump-Hotor Assembly.

Reliance motor

~

spec's; lilp., 460VAC, 60,11z., 36, and 1.7 AMP Pumphcads: ASTil-A351, GR.3 Diaphragms: Nylon rc ^ fore Tubing: ASMC-SA213, GR.316 iD 1

Comsip, Inc. mdl. no. 11749, Air Cooled IIcat Exchanger.

Fittings: ASTM-A479,GR.316 D

1 Comsip, Inc. mdl. no.11750, Sampic Ilot Dox Assembly.

10 1

Comsip, Inc. mdl. 37009, Local Analyzer Meter Trim Assembly. (Comsip, Inc.

fabricates this trim assembly to conver the 0-1VDC analyzer output to 0-200 pA, for meter input.

Dody: ASTM-A351, GR.316 11 1

Comsip, Inc, mdl. no. 11727 (R ),

Downstream pressure regulator.

Sct at 14.7 psia, 1" NPT. (Comsip, Inc. modifies a conoflow mdl. no. II21XT-XXXK Diaphragm: GR.301SS for this service.)

nody: ASTM-A351, GR. 31G 12 1

Co'msip, Inc. mdl. no, 11720 (H ), D wn tream pressure regulator.

Set at 2

-11 to:-13in. 119, }" NPT.

(Comnip, Inc. modifics a Conoflow mdl. no. II21XT-Diaphr.jgm:

GR.301SS XXXK for this service).

- (3 j

DWG NO. 05 4 J,.!,3 PAGC 5 '

'O f-l l

POR K-III POST-LOCA IlYD110 GEN MONIT0llING SYSTEM l

Rlb.lDATE 13Y DCS tilG.

l'RO D. ()

i i

QTY.

14ATERIAl ' CERTIFICATE ll;;;

l'nn

,nang SYSTEM EQUIPMENT' DESCRIPTION REQUIRED:

I nody: ASTM-A351, Gn.316 i

f Consip, Inc, mal. no.11729,(R)), Differential pressuro regulator and Iixed Diaphragm: ca,30133

?

13 1

Orifice.

Regulator set at 3 psig, l NPT.

(Comsip, Inc. modifies a conoflow mdl. no. II21XT-XXXK for this service).

Fixed Orifice flow; F.O. Assembly: GR.316SS 180 cc/ min n t-1 ne l r1 Body: ASTH-A351, GR.J16

, 14 2

Conoflow, mdl. no.,Il21XT-XDXK/SSN, Differential Pressure Regulator, Diaphragm:, Neoprene rubbc1 Set at 3 psig.,, 1" NPT.

Tubing: ASTM-A213, GR.316 15a 1

Delphi Instruments, mdl. no. D5, Ilydrogen analyzer, (Thermal conductivity type). Consisting of the analyzer cell (15A) and, analyzer indicating Cell Diock: ASTM-A479, GR 15b

. transmitter (15b).

Dual range; 0-10% and 0-20% including calibration AMP Doard:

I.R.T. certs potentiometers, 0-lVDC output.

(with additional AGM module)

General Electric, md'l. no. ET-16, Indicating lamps. 17 with red lens and 16 25 O'with amber lens.

Il5VAC, 60liz.

1-7 0

General Electric, mdl. no.'s CR2940-UR203P (2), CR2940-UD203D (1), CR2940-UD 203G (1), CR2940-WA202C (4).

Il5VAC, 60 tiz. with 10 AMP continuous rating.

10 10 1;onceal Electric, mdl..no. ED25-Al2WC, Terminal Block.

GOOV, 30 AMP continuous rating.

I 9-

owc. tio. 054SO o

799

• j IlYDRbG 1 tioNI IIIN YSTEM l

l 1

ItEV. LATE l BY 1)CS Iild.

ll'1100 10 QTY.

HATCRIAL CCRTITICATE

ll PCR

!aER SYSTEM EOUIPMENT DESCRIPTION RE0tIIllED:

19 1

' General Clcctric, mdl. no. CR206D102, magnetic motor starter.

460VAC, 60liz., 3%,10rJ1P. continuc us ' rating, Silp. (minximum).

20 1

Gener'

" M tic, mdl. no. CR2010A14AJ, Relay.

600V, 60liz., 10 AMP.

(n.:.s ;<:. rating.

DcIlows and Plug: GR. 3165:

21 2

Iloke, mdl. no. SS-4212F4Y, Bellows seal valve.

Body: ASTM-A276, Gil.31G 22 1

I.T.C. - Gould, mdl. no. P1515 and PL-25, Dreaker and breaker box, respectively.

15 AMP rating.

Dourdon Tube and Stem:

23 1

Marshalltown, mdl. no. 52B, Cor pound pressure indicator.

Range 30 In. lig GR.316SS to 60psig.

Cnd Blocks and ritting :

34 1

ilhthenon, mdl. no. EM-1050-V1, Flowmcter.

Inlet mounted high performance GR.316SS value, size no.- 1 glass tube, Float;' no. 1 glass, Ranger'0-60 ccm (air), seals:j Viton direct reading tube, 1" tube compression fittings, (Rongent g'as)

.r, a

Dwo. t:0, Obilj0 lon K-III I'OGT-LOCA

'T IlYDilOGCtl hot 1ITOltIllG SYSTEM' l

REV.

DATE BY 1]CS 1;IIG.

. L'I:lili-l{

l MATERIAL CERTITICATE l

QTY.

ICH PER COUIPHENT' DESCRIPTION REOUIRED:

u

)HBER SYSTEM Cnd Dlocks, Float and -]

a 8

25 1

tlatheson, mdl. no. FM-1050-V1, Flowmetce.

Drilled and tapped end blocks wittb "9"*-

0-270 ccm (air), direct reading.

A s: Viton plug, size no. 2 glass. tube, Ranoc;

. tube, !" tube compression fittings. (ccll flow).

r~

jnd Blocks, Float an.

l 1

c'ittings : Git. 31GSS 26 1

Matheson, mdl no. FM-1050-v1, Plowmoter.

Inlet mounted utility valvo, size no. 2. glass tubo, Range; 0-270 ccm (air), direct reading tube',

3cals: Viton i", tubo compression fittings,(calibration gas).

and Blocks, Float and l

?ittings: GII.31GSS 27 1

Platheson, mdl. no. Ft1-1050-lV, Flowme tor'.

Drilled and tapped end block with 5-50 SCFil (air), dirdet reading 3cals: Viton plug, size. no. O glass tube, Range; tube, 1" tubo compression fittings, (Dypass flow).

=

ASnf A

Dody and Compones'it.n:

A479, GR.316 SS-4CA-3, check valve. Adjustable range: 3 to 50 psig.

f,'

Hupro, mal, no.

"O" Ring: Viton 20 3

(Comsip, Inc. modifics this check valve for this service).

(5) DPDT and (1)

Potter and Drumficid, mdl. no.'s KRP-llAG and KRP-14AG,

.29 6

3PDT relays, respectively.

Il5VAC, and 5 AMP. rating.-

Pressure Part, Diaphranm, j and Fittings: GII.316SS Static "O" 111ng,' mdl. no.4N3-K5-MX-ClA Pressure switch. Set at 20 psig 30 2

"O" Ring:

Viton decreasing, !" NPT.

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00193i cArg 07-01-81 t.ETTER No. C;C5

') 't o tA Mr. C. A. Price Manager PRODUCTION EHCIMEERlHG SCUTH CAROLlH A ELECTRIC & C A1 C3.

P.O. 50% 764

~

COLUM51A SOUTH CAROLlHA ~3218 Re. YlRGIL C. SUMMER HuCLEAR STAT!sg UHlf NO. I

~

~

Fit.E 1R prm-c cal No. 4441 co.

.SUEJ: ACCEPTED VENDOR EEE QUAL,

[.i5rarMr. Price:

)

or SEISMIC RE?T..

ATTACHED PLEASE FIND THE ITEMS LISTED BELOW FOR THE PURPOSES twDICATED W AR t:ED BY CAI FOR INFORMATION APPROVED BY CAI FOR CCJ4MENTS APPROVED A5 CCRRECTED BY CAI FCR APPROYAt.

XX ACCE?TED SEISMIC RE?T. for pg3 FOR CisTRisuTION

~

XX ACCEPTED IEEE QUAL. for PRS P R ELIMINA RY XX SQRT ITEu DESCRIPilCH (TITLE, HUMSEn CR SU5 JECT)

?.O.# 26584 SPEC # 636 -' -

Q

.1(,4 5ft)

" ATTAC ED IS A VENDOR IEEE QUALITICATION RE? ORT / VENDOR SEISMIC REFORT, ACL u,u.u EY CAI ENGINEERUG ON June 9, 1981

' j CUEJECT/IITLE Hydrog'en Analyzer

-K-IV'. Remote Control Panel ly3r 'p 92-38430-e 92-3875-0 92-3.874-0 92-3871-O-N.

VENDOR RI? ORT p 1035-1 1035-2 1035-5 REV. 1 NUC-9 CJLI CONTROL & 9550 f

7 VENDOR Comsip g BlC 4 j

p' VENDOR SU3MITIAL DATE 12-22-80 s,

g..

co

,,,,, <> 2 n m CR CCMME,HT5 U' O. RETURN CDPIES OF THE ASCYE YlTM APPR di W rcM D RKS:

w C. A. Price (orig. + 1)

YERY TRULY TCUR$.

V. C. Su==cr.

U "'#'

O S a han srk NPCF/*#nitaker E. E. Yocom M.'E. k~nitaker Pro.iect l'an3Ser

?RS/ Weeds / Encl.

cc: C. G. KRAMER E. J. Hoffert S. BAILEY M.

E. Yccc=

J. W. FOSTER E. E. Crc s, Jr.

1:_LG_TM_;_cil_E __E ___?_L951 - - - -

i ATT A C.M m e MT

\\t 1.

Reactor Building Cooling Unit, Damper Actuators QUESTION:

Provide clarification of natural frequencies on 5QRT forms, the SQRT forms indicate that the frequencies in three principal directions are 17 Hz in S/S and F/B, and 42 Hz in vertical direction.

The results presented. in the test reports did not correspond to any of these values.

RESPONSE

The above frequencies were supplied in error and are not correct.

Attached is a revised and corrected SQRT form for the damper actuators with the corrected frequencies.

2.

Main Steam Isolation Yalve QUESTION:

Provide the reason for not superimposing the effects of both the sonic flow and pipe load conditions.

The reports provided do not address the sonic flow test performance.

RESPONSE

This item is still in review, a final response is expected to be completed by 9/11/81.

3.

480 Volt Unit Sub-stations No open items.

4.

Accumulator Tank No open item.

5.

Diesel Generator and Associated Equipment a.

Exhaust Silencer OUESTIONS 1.

To clarify whether the direction of loading considered in frequency calculation by Raleigh method coincides that of the first-mode shape of the equipment response.

t 2.

Assess the discrepancy in frequency calculation using a one-degree-of-freedon system as reported against.a. combined three-degree system.

3.

Provide justification that the equipment is still qualified, with due consideration of items 1 and 2, if the equipment natural frequency is proved to have been overestimated.

RESPONSES:

1.

The first significant mode shape for seismic analyses approximates the displaced shape due to gravitational loading in the directi'on of interest.

The use of finite elements provides this displaced shape and includes additional secondary displacement due to ovalling and discontinuities.

2.

The shell is uncoupled in the three directions of interest.

This means that a vertically applied gravitational load does not cause significant axial or Internal displacements.

Therefore, the use of independent frequency calculation for the three directions is appropriate.

3.

A 10% margin is provided for the frequency calculations to account for over and under estimation effects. A 15% maring is provided in the design response spectra for similar purposes.

These margins provide satisfactory conservatism for uncertainties in approximations.

b.

Exciter Cabinet OUESTION:

l In light of the structural damage of the cabinet observed during the test, provide Basler and/or Gilbert Associates (GAI) assurance that any potential structural damages on the cabinet will not affect the electrical function of the device.

t

RESPONSE

Although structural damage was observed during the test, the equipment within the cabinet continued to function throughout the test with one exception.

This exception was the contacts with the potential transformer drawout mechanism.

After proper adjustment these contacts performed satisfactorily for the remainder of the test.

As a result an inspection for proper adjustment of the contacts has been added to the inspection and maintenance program for the l

equipment.

This continued operation of the equipment throughout the seismic test demonstrated that the structural damage that did occur did not and will not affect the electrical function of the excitor.

l l

.o e

In addition, none of the critical electrical components.are mounted directly to the cabinet, each assembly or component has its own base which in turn is mounted to the main cabinet.

Therefore, structural damage to the cabinet cannot directly affect any,0f the electrical components.

c.

Neutral Grounding Resistor 00ESTIONS:

1.

Provide justification that the separate sine wave tests conducted satisfy the multidimensional excitation requirements.

2.

Assess the effect of the smaller clearance of the installed resistor as compared to the larger clearance of.the test items.

3.

Assess the effect of dimensional differences in the dynamic response of the installed resistor in the light of the required response spectra.

RESPONSES:

1.

The use of separate sine wave tests is acceptable for several reasons.

The required response spectrum as a significant response at one predominant frequency in each axis with a somewhat lower response at a second and distin:t frequency.

Therefore, the input to the resistor in the event of an earthquake will be essentially at two discrete frequencies at each access.

In addition, the acceptance criteria is ifmited to the maintainence of structural integrity since there are no moving parts or other complex functions to the resistor.

1 Also the long dwell at each frequency produced a more severe response than would be expected from a multi-directional random motion input.

2.

The tests data indicates that the maximum responses of the j

resistors for side-to-side and front-to-back motion i

l respectively were 4g at 5 Hz and 6.5g at 6Hz.

These l

responses are both equivalent to a 4 inch displacement.

I Since this displacement is significantly less than the available 10 inch clearance between the resistor and its enclosure no interference or other degradation is anticipated.

l 3.

On page one of the report GE states that their experience l

with several tests of similar resistors has produced similar resul ts.

Therefore, we would not expect the dimensional

t differences to have a significant effect on a dynamic response of the installed resistor.

6.

Electrical Containment Penetration QUESTIONS:

a.

Provide GAI letter CGGS-14262, December 20, 1977 b.

Provide GAI evaluation of D. G. O'Brien reply document.

c.

Provide clarification of D. G. O'Brien reply 3.0 RESPONSES:

a.

A copy of the requested letter is provided as Attachment A.

b.

A copy of the GAI evaluation of the D. G. O'Brien reply is provided as Attachment B.

A clarification of D. G. O'Brien's paragraph 3.0 of' their letter c.

of 2/17/78 can be found in paragraph 3, of GAI letter of 4/27/78 (Attachment B) in D. G. O'Brien letter of 7/6/78 which is provided as Attachment C.

i

. 7_1 Oualification Sumary of Eouioment Virgil C. Summer Nuclear I.

Plant Name:

statinn ung e 1 Type:

1.

Utility:

SCE&c PWR x

2.

0SSS: wentinehouse 3.

A/E:

CAI ONE I,I.

Comoonent Name Reactor Building Cooling Unit Damper Actuators 1.

Scope: ' [ ] NSSS-

[X3 ' BOP.

~

2.

Model Number: NT 3128-sn4-12 Quantity:

4 3.

Vendor:

Bettis 4.

If the component is a cabinet or panel, name and,model No. of the devices included:

N/A 5.

Physical Description a.

Appearance Pneumatic Actuator b.

Dimensions 7.2 in long x 15 in max. diameter c.

Weight 393 lb 6.

l.ocation:

Building:

Reactor buildi'ng Elevation:

543 Ft 7.

Field Mounting Conditions [ ]

Bolt (No. 4

, Size 3/4" )

[] Weld (Length

)

[]

8.

Natural Frequencies in Each Direction (Side / Side, Front /Back, Verticall (x)

'(Y)

(Z)

S/S: 24, 63.5 Hz F/B: 99 Hz h 37.5, 41.5 Hz 9.

a.

Functional

Description:

open and Close HEPA Filter Bypass Dampers b.

Is the equipment required for []

Hot St.andby '[ ]

Cold Shutdows

[]

Both Post Accident 10.

Pertinent Reference Design Specifications:

SP-534-044461-000, SP-702-4461-00

l I-l

.P III.

Is Eauioment Available for Insoection in the Plant:

[ 7]

Yes

'[ ]

No IV.

Eauioment Oualification Met' od':

Test:

X h

Analysis:

Combination of Test and Analysis:

Test and/or Analysis by Southwest Research Institute

~

(name of Company or Laboratory & Report No.

Report No. 02-4854-RPT-1 Y.

Vibration Inout:

~1.

Loads considered:1.[x] Seismic only 2.[ ] Hydrodynamic only 3.[ ] Explosive only 4.[ ]

Other (Specify) 5.[ ]

Combin.ation of 6.

Method of combining RRS:

[x] Absolute Sum [ ] SRSS { ]

2.

Required Response Spectra (attach the graphs):

3.

Required Acceleration in Each Direction:

S/S =

.525-c ZPA (SSE)

F/B =.525 g ZPA (SSE)

Y ='.400 R ZPA ISSE)

VI.

If Qualification by Test, the'n comolete:

[x] random 1.

[ ] Single Frequency

[x] Multi-Frequency:

[ ] sine beat

-[ ]

2.

[ ] Single Axis

[x] Multi-Axis 3..

No. of Qualification Tests:

OBE 5

ssE

'l Other

~

4.. Frequency Range:

.5 Hz to 35 Hz 5.

TRS enveloping RRS 'using Multi-Frequency Test [X] Yes (Plot TRS on RRS graphs

[ 3 No 6.

Input g-level Test at.

S/S = 7 g's ZPA F/B = 7 g's ZPA Y = 9.5 g '

ZP, i

7.

Laboratory Mounting:

Representative of plant installation l

1.

[ ] Bolt (No.

Size

)

[ ] Weld (Length

)

[]

8.

Functional operability verified:

[x] Yes

[ ] No

[ ] Not fpplicable 9.

Test ResTJ1ti incitiding modifications made:

Test demonstrated structural l

integrity and functional operability.

l l

10.

Other tests performed (such as fragility test, including results):

6 Plant induced vibration - 10 cvelee nr.75 e

h.$c/h G.22T Mo a A 'A cknevi A-

[/

Gilbert / Commonwealth engineers and consu:: ants GILEERT ASSOCIATES. INC P. O. 8:x 1493. Reading. PA 1SB03/Tel 215 775-2600/ Cable Gitaso:/ Telex 836431 December 20, 1977 CGGS-14262 D. G. O'Brien, Inc.

500 Cochituate' Road Fra=ingham, MA 01701 Attention: Mr. H. P. Hilberg Re:

V. C. Su=mer Station Electrical Penetrations, Seismic Qualification D. C. O'Brien Report, Appendix K of ER-252, dated 11/8/77 File:

18.10249 Centlemen:

The attached memorandum (same subject) su=marizes our comments to your seismic qualification report referenced above.

Your timely resubmittal of this report will be appreciated.

Attachment:

GAI Memo from D. K. Kelly to D. K. McIntire dated 12/.14/77.

Very truly yours,

c8 D. K. McIntire Electrical Engineer e 7A1 *

+

E. Wiel opols}p. H. E. Yo e,'Jr.

Project Manager DEM:EW: HEY:mhm ec:

T. A. Schlegel H. T. Babb NPCF/Babb O. K. thon, Jr.

E. H. Crews, Jr.

D. A. Nauman V. C. Su==er C. M. Reynolds C. A. Price A. W. Grammes

'25 Laxa $ts' Avenue. Atade;. PA / L8:qsmo.6 Asad, Cnen H.tts Rest.n; FA 215 7E'Tc0

~-

a m

Rhij PEIE23lEl

~ /C Gilbert / Commonwealth Dece=ber 14, 1977 2:

D. K. McIntire from:

D. K. Kelly subject:

V. C. Summer Nuclear Station Electrical Penetrations, Seismic Qualification D. G. O'Brien Co. Report, Appendix K of ER-252, Dated 11/8/77 I have reviewed this report with the help of Te-Hung Chen and in my opinion, en acceptable qualification can be achieved based on the data in this report.

Bowever, the report as it stands does not adequately demonstrate the seismic qualification of the electrical penetrations for V. C. Su=mer Nuclear Station.

My specific technical co=ments are as follows:

1.

The report apparently covers low voltage power, control, and instrument penetrations.

Other data is needed for the qualification of the medium voltage penetrations for reactor coolant pump power.

2.

From the report, it is not clear that the test penetration and test fixture were representative of the V. C. Su=mer Nuclear Station penetrations and their installed configuration.

The final report should include drawings of the test unit and test fixture and of the penetrations for the V. C. Summer Nuc1' ear Station including the containment nozzles and field cables.

The report should specifically address the comparability of the test penetration to the V. C. Su=mer i

l penetrations and discuss any differences between the two.

In

~

particular, the photographs.suggest that the V. C. Summer Station.

nozzle projection was not modeled by the test fixture.

3.

The photographs indicate that a very limited number of field cables were simulated.

These cables were also taken out of the top of the penetration.

A final qualification report should include calculations I

to justify the integrity of the junction boxes with a cable quantity representative of the worst case on V. C. Summer Station with these cables exiting from the bottom of the box.

l 4.

The calculational method for developing a required power density spectrum from a required response spectrum appears to be valid, however, I know of no published literature or textbook material to support this procedure (or provide an alternate procedure).

I understand that to date the NRC has not reviewed any equipment qualification based on the power density l

l

Pagn 2 spectrum and has no expertise in this area of qualification.

Therefore, SCE&G Co. should be cautioned that the licenseability of this qualification cannot be predicted.

I do not reco= mend preceeding,with. any requalification at this time on the basis that qualification using a power density spectrum appears to be valid and requalification in the future, if required by the NRC, would not be more dif ficult or costly than r,equalification at this

' ti= e.

5.

The report did not include calculations of the required power density spectrum for-V. C. Su=mer Nuclear Station or compare the required power density spectrum to the test power density spectrum.

This calculation and comparison must be included in the final report to provide qualification for V. C. Su=mer Nuclear Station.

6.

The purpose of the material on shock spectrum plots is unclear.

Also, the method of calculation is not given and the results ar,e so poorly labeled that I am not able to interpret them.

Therefore, this section does not contribute to the qualification and should be either up' graded to meet the requirecents of SP-702 for clarity or should'be deleted.

7.

The comparison made on the last two sheets on the report is so brief that it is meaningless.

As these comparisons stand, they.do not support the stated conclusions.

My. specific editorial co=ments are as follows:

1.

The report does not contain a table of contents or' introduction to coordinate the various sections of the report.

The final report should include both a table of contents and short introduction.

2.

The labels and scales on the various graphs and plots in the report are mostly illeligible.

These graphs and plots in the final report should be co=pletely legible.

3.

The picture quality in the report is good and the final report should include the same quality of. photo reproduction.

4.

The final report should clearly state that it applies to the V. C. Sum =er Nuclear Station and list the appropriate contract' and order numbers.

f. M/&

D. K. Kelly DKK:mhm l

ec:

T. M. McMahon E. Wielkopolski/H. E. Yocom, Jr.

T. A. Schlegel R. P. Cronk T. H. Chen l

t L

~

- I

~.

/[' Gilbert / Commonwealth engineers and ems *'a'.5_ _. -

'y GitEERT ASSOCIATES. INC, P. O. E:x 1453, Reading. PA 19003. ict g g, r g

4 April 27, 1978 i

D. G. O'Brien, Inc.

One Chase Park Seabrook, New Hampshire 03874 Attention-FA H. P. gilberg South Carolina Electric & g 8 Company V. C. Summer Nuclear Statio" ' Unit i Re:

CAI 04-44461-000 Electrical Pcncerations Seismic Quali[ication EL-2 File Code:

Gentlemen:

answering our questions is appreciated and Your letter of February 17, 1978 etter of December 20, ears to generally resolve the concerns eXPresac As a result of our review of your letter, we have the {ollowing comments wh should be considered when you prepare the final rcPort.

the q lification'of the and your conclusions indicate thatY P

n of the test 1.

penetration design is now being demonstrated This is acceptable to response spectra to the required responso UPecer us and we believe it is more readily licenonb P "**

h spectral density spectra.

However, with this approac, the final report computer program or conputing devices needs to contain a descripti~on of the used to obtain the test response spectra ff" feo v rt M Ge required o

the discussion response spectra to a required power spectral density spectra in the density spectra.

Conversely original report is no longer germane.

pe tration is a suitable The description of the test fixture and Pf0t*'

description of the 2.

N r

snbstitute for drawings of these devicc8*should be ineluded in the final report.

fixture and prototype penetration I

l Yg 6

q h/of (/HR N0. g, r,, yo,, pg n g g p A ht,$q ff j yp tn

)

g g g yg I

~

--D I851 Wasq.qAg g

3 s

', c;gart/comm:nw25 th,n-am f

sam en.ru. m:. r c s. ua w n um D. G. O'Brien, Inc.

Attention:

Mr. H. P. Hilberg April 27, 1978 2

3.

Junction box integrity is significant to the functional int'egrity of the penetration.

Failure of the box, particularly failure of.the attachment

'of the box to header plate, could put a severe loading on the field cables which, in turn, could cause failure of the cables or the cable connector interface.

Although D. G. O'Brien, Inc. Report ER-257 addresses the' structural capability of the penetration, it does not discuss the structural adequacy of the junction box or the junction box to header plate interface.

Therefore, we are still concerned about the structural' integrity of the junction boxes loaded with field cable representative of the worst case for V. C. Sunmer station.

4.

If'D. G. O'Brien, Inc. prefers to identify the reports applicability to V. C. Su=mer Station by the use of a cover letter, this is acceptable to However, a transmittal form is not generally acceptable and'in some us.

previous cases, reports have been received without any cover letter or transmittal letter of any sort.

If you would like to discuss any of these coc=ents, please. feel free to call.

Very truly yours, 5U -W Y/Y D. K. McIntire Electrical Engineer

~

DKM:hsc cc:

O. W. Dixon,.Jr. (2)

E. Wielkopo ski /H. E. Yocom H. T. Babb Project Manager E. H. Crews, Jr.

T. C. Nichols, Jr.

l V. C. Suc=er R. P. Cronk D. K. Kelly

.,,m.

--w

p9d 3

4J l- /./ A CH Meri W

D. D. DBnien.Inc.

N-1308-69005 South Carolino Elec. & Gas Co.

Virgil C. Summer Station July 6, 1978] M 1 P.O. No. SN-10249-SR I

Gilbert Associates,.Inc.

P.O. Box 1498 Reading, PA 19603 Attn:

E.Wielkopolski/H.E. Yocom Project Manager Gentlemen:

The enclosures with this' letter should clarify your it6ms 1 and 3 in your letter of April 27, 1978. covers the method of calculation used to. convert power spectral density test inform-easily understoo'd, acceleration vs frequency' otion to the more soismic curve's. is Appendix H taken from the stress report, DGO, Inc. ER-257.

Thank you for your patience in this matter.

FILE :

gg gmqQ l1l A l BY NWE Yours very truly, I

I I

BRAODICK D.G.

BRI

_NODLAND HETTINGER caoun PAOUNI I

.R. Hilbers COLDSTEIN

~diio0ETTE

Monoger, Enorgy Components.

.SH,EtooN l

)

l SETLOCX StAITH l

HPH:cfr I

l

[ FOSTER cc:

• C.A.

Price, SCE & G

//

DISPOSITION D.A. Nauman, SCE & G WDM ACTION :

• D.K.

McIntire, GAI RECEIVED P.C. Doringer, DG0 ACTION PARTY RETURN R.B.

Henderson, DGO JUL 101978

.w.NEo on.c. To en E. WlELKOPO.LSK(

I

e

,s W

O. G. O'BRIEN, INC.

R EPORT NO.

T aHEET I

OF T TLE ' ENCLOSURE 1 10 INTRODUCTION 1.1 The assignment for this computetion coneerned the fato plots in AETC random vibration seismic exposure Report 11180.

These dato plots we're presented in a form which was difficult to compare with the specifi-cation requirements.

The assignment required thos this existing data be translated:

From

. Power Spectr.al Density, g /Hz vs frequency To Acceleration Level, g vs freque.ncy

1. 2 -

Two resources were neces.sory for this computation:

1.2. l'.~ A record of the.several Random Vibration Test S.pectro which were'used dur~ing the 11180 testing.

This. record wos af allable ot. AETC '

stored m a g n e t i c '.t o p,e.

on 1.2.2 A specialized computer Time Dato Nodel TDV-20.

j

.The. computer.was.clso available at AETC and provided.the' features and capabilities indicated below.

2.0 COMPUTER 5ET-UP-2.1 The computer contained a large number of sec'ond-order r e s o n a n t' circuits.

Adjustments provided.so that, were

~

each resonant circuit c,ould be chorocterized.by:

val'e for its resonant frequency, and 1) u a

'2) o value for its domping ratio or Q.

The number of resonant circuits and their individual frequencies were chosen so that:

1)

The separation between adjacent frequencies was i

1/3 octave, and l

l 2)

~The patter,n of resonant circuits spanned the l

l entire frequency range of interest, ie, I through 100 Hertz.

O b o, c, o.ggggy, gyc,

., R EPORT no.

~~ '

SHEET 2

op TITLE ENCLOSURE 1 2.2 It must be emphasized that this potkern of'resonont circuits has no correlation with the t e s.t. s p e cime n,

has no correlation with the test setup, and has no.

correlation with any phys.ical hardware.

It is simp 1'y part of a tool which translates the roSdom vibrot, ion data to,occelerotion vs frequency display which con be readily compared with seismic specification curves.

~

3.0 COMPUTATION 3.1 The computer was p.rogrammed so~that the'se second-order resonant circuits.could be utilized individualiy, ie, one.at a time ~ond.in sequence.

During the utilizotion,

,the. resonant circuit received on input and delivered

~

an output.

3.2 The. input to a. resonant circuit was the random vibration test data f' rom the m,ognetic tape..

This 1nput was

~

sustained.for o controlled time duration of 30 seconds (that'is, for o computing time which corresponded to.

30 seconds of test' exposure).

3.3 The ou.tput from o resonant circuit contains information-from the random vibration test dato

.; but the infor-motion has been filtered because this individual, re-sonant circuit has chorocteristic values for resonant frequency and for Q.

'3.4 The computer is able to interpret this output in either of two formot's:

a)

Power Spectral Density, g / Hertz, or b)

Acceleration level, g.

l The acceleration level interpretation was used for this l

Computation.

%.,9. W O. G. 0'BRIEN, lNC.

3 op REPORT NO, SHEET TITLE ENCLOSURE 1

3. 5 The interpreted output is stored in o.two-dimensional memory -- in our,. case,as Acceleration Level vs Frequency.

The frequency' increment was 0.25 Hertz.

I.t will be easier to visualize this computation process if we say there ore several memories and assign one memory.to each' individual second-order resonant circuit.

3.6

.This process is repeated for each resonant' circuit.

s Each resonant circuit.rece.ives its 30 second. dose of random vibration.

Each' memo'ry receives interum-translated information, Acceleration Level'vs Frequency.

3. 7.c? After.these.several interum-translations ore completed,-

the several memories are combined.

The.Accelerotion I

Level sig nals are added..

3.8 This combined signal is plotthd and displayed as the computation result.

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LEVEL GSQR/HZ.:.002000 ALARM LIMITS +DB,-DB :3. 000,-3. 000 -

1 TEST ID: D.G.OBRIEH RAHDOM DATA ABORT LIMITS +D8,-08:6.000,-6.000 2 HEADING: CHANGE TO SHOCK SPECTRUM

~

11 FINAL SLOPE, DB/DCT: -24.00 3 BANDWIDTH: 50.00' 4 RESOLUTION 100/200/400/600/900: 20GIf01S=1. 579 FREQUENCY INCP,EMENT, HZ=.2500 12 ALARM / ABORT RANGE:

REFERENCE SPECTRUM:.

LOW,HIGH FREQ: 1.000,40.00 5 IHITIAL SLOPE DB/0CT: 24.00 LINES TO -TRIGGER ALARM: 3 ALARM LIMITS +DB,-08:3.000,-3.000 LINES TO TRIGGER ABORT: 6

/

ABORT LIMITS +DB,-DB:6.000,-6.00013 LOW LEVEL, -08: -10.00 14 LEVEL INCREMENT, DB: 2.000 6 FREQUENCY HZ.: 1.000 15 START-UP TIME SEC: 20.00 LEVEL GSQR/HZ.:

.002000 16 SHUT-DONH TIME SEC: 60.01 ALARM' LIMITS +DB,-DB : 3. 000,-3. 000 17 TEST TIf1E HRS, MIN, SEC: 0,1 O ABORT LIMITS +DB,-DB:6.000,-6.00018 AUTOMATIC INCREASE, 1=YES 0=NO: 0 19 CONTROL CHANHELS:

1

? FREQUENCY HZ.: 6.000 20 AUXILIARY CHANNEL: O LEVEL GSQR/HZ.:

.2000 21 ACCEL SENS MU/G:

ALARM LIMITS +D8,-08:3.000,-3.000 CH 1:

100.0 ABORT LIMITS +DB,-DB:6.000,-6.000 22 DRIVE CLIPPING 1=YES, 0=HO: 0 23 ALARM LEVEL GRMS: 2.000 8 FREQUEHCY -

HZ.:

10.00 ABORT LEVEL GRMS: 2.500 LEVEL GSQR/HZ.:

.2000 24 LOOP-CHECK MAX DRIVE (VOLTS):

ALARM LIMITS +D8,-08:3.000,-3.000

~

.2000 ABORT LIMITS +DB,-DB(6.000,-6.000 CORRECTIONS 1=YES, 0=NO:

9 FREQUENCY HZ.: '30.00 LEVEL GSQR/HZ.:

.02000 ALARM LIMITS +DB,-DB:3.000',-3.000.

ABORT LIMITS +DB,-DB 6. 000,--6. 800 10 FREQUENCY H2.: 40.00 FWoM r BAcx,

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,e T.so LNT t oe4 U ALUh QUESTION: (mgi g sig Am + Provide the reason for not superimposing the effects of b'oth the sonic flow and pipe flow conditions. The reports provided do not address the sonic ' flow test performance.

RESPONSE

A. It must be recognized that the testing performed (cira 1977) was c a " state-of-the art" effort. It was a pioneering test never before attempted - at least as far as we know - by any other valve manu-facturer on such a large scale. It was Atwood and Morrill,'s (A&M) contention that full scale testing was the only way to properly verify performance. B. There were then, and continue to be, no nationally recognized standards for generic qualification of valve assemblies. Although the standard effort was underway then, it is still not finished today. (A&M) recognized a need to proceed without such standards. C. The requirements of NRC Regulatory Guide 1.48 do not specifically deliniate what combinations of analysis and tests are appr'opriate to qualify valve assemblies. D. The feasibility of performing a combined flow interruption and bend test was evaluated. There was then no single facility capable of performing combined tests on such a large scale, so (A&M) built two facilities to do each test separately. E. Although not yet complete, the standard for qualification of valve assemblies (which is being prepared under the direction of Manu-facturers Standardization Society), allows separate flow interruption and bend tests on valve assemblies. We offer this as an example of current industry thinking. F. It is our opinion that since the MSIV can be demonstrated to function before, during, and af ter the limiting pipe bending and seismic loads tests, deflections caused by such loads have no effect on valve operation. It is therefore logical to conclude that separate demonstration of the flow interruption closure should qualify the valve design for the simultaneous full flow and pipe load conditions as referenced in the (A&M) qualification report (No. 44 Bend Test).

-~ .:n .n. . - ~.m . n. r I'

Response

to Seismic Qualification Review Team Concerns Expressed. by Brookhaven National Laboratory 1. Diesel generator exhaust silencer: In their original review reports, BNL expressed several concerns about the natural frequency calculations for the diesel generator exhaust silencers. Gilbert / Commonwealth (G/C) has reviewed these concerns and concluded that the silencers are adequate, although certain inconsistencies were found in the original Colt Industries calculations. Attachments #1 through #4 are the G/C analysis which are provided for your information. Diesel generator excitor cabinet: 2. In their original review report, BNL expressed a request that an evaluation of the structural damage that occurred during the seismic testing of the equipment be made by Bassler and/or by G/C. G/C carefully evaluated the significance of the structural damage that occurred during the test as a part of the evaluation of the qualification prior to its original acceptance. Although structural damage w'as observed during the test, the equipment within the cabinet continued to function throughout the test with one major exception. This exception was the contacts for the potential transformer draw out mechanism. With the proper adjustment these' contacts performed satisfactorily for the remainder of the test. As a result, an inspection procedure for proper adjustment of the contacts has been added to the inspection and maintenance program for the equipment. Attachment l

1. 6 is a copy of this procedure. This continued operation of the equipment throughout the seismic test demonstrated that the structural damage which did i

occur, did not and will not, effect the electrical function of the excitor. In addition, none of the critical electrical components are mounted directly to the cabinet. Each assembly or component has its own base which in turn is mounted to the main cabinet. Therefore, structural damage to the cabinet cannot directly affect any of the critical electrical components. 3. Diesel generator neutral grounding resistor: In their original review report BNL expressed several concerns about the differences between the tested resistor and the contract resistor, as well as a concern about the use of single axis testing versus the multi-axes input from an actual earthquake. The neutral grounding resistor is a very simple structure which consists of an assembly of ceramic tubes supported by simple steel framework. This framework is supported in turn on 4 porcelain insulators. It is the opinion of G/C that the geometry of this structure is such that response in axes perpendicular to the input motion (cross axis coupling) will be negligible. On this basis single axis testing was accepted. w --e w --n-w,r-a, -re-,- -,.e.-m .--.r.----men, ec n e~~~ --m- ,,m ,-p.,, -,-m,--,, ym_. -mg w n m------*-~4 ---,-w-w-

e _,_.-. The test data indicates that the maximum responses of the resistors for s'ide to side and front to back motion respectively were 4G at SHz and 6.5G at 6Hz. These responses are both equivalent to a 4 inch displacement. The displacement of the enclosure cannot be established from the available data, however, experience indicates that the displacement will be about 2 to 3 inches. Since the combination of the enclosure and the resistor displacements are significantly less than the available 10 inch clearance between the resistor and its enclosure, no interference or other degradation would be anticipated. G/C has estimated that the natural frequencies (in the horizontal directions) of the contract resistor are approximately 1 times that of the tested resistor. The analysis used to make this estimate is Attachment #5. In reviewing the significance of this shift with respect to the required response spectra, it can be seen that the tested resistor had natural frequencies which lay within the range of expected building resonant frequencies. Therefore, any shift in frequency between the tested and contract resistors would only tend to lower the response at the contract resistor. 4. Containment electrical penetrations: In their original review report, BNL requested various materials which were not included in the materials available to them. These materials were provided to BNL and in a subsequent review dated 9/24/81, BNL expressed a specific concern about the change in resonant frequency of the junction box panels during sine dwell testing. The single frequency tests (linear tests), including both the sine surveys and the resonant dwells, can be considered as exploratory tests intended to find ~ inherent structural weaknesses. The seismic " qualification" is based on the random frequency tests which are also reported in the Acton report #11180. The response spectra from these random motion tests, which are included in the back of D. G. O'Brien report ER252K, envelope the V. C. Summer Station required response spectra with a test response acceleration of at least twice the required response accelerations. Therefore, the change in resonant frequency in the junction box panels during sine dwell testing does not imply any inade-quacy in the seismic " qualification" of the penetration assemblies.

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I 8 F %" n e^ e. o.,4 .BASL a n 20Tn!0.00. l D R AFTS M AN mt d,?,","r* HIGHLAND, ILLillois l 1

CHECKER M. $ e u o.t r FIELD INSPECTION OF THE LOW AND HIGH APP' yM 3; gy jg VOLTAGE CONTACT FINGERS OF THE 91157 00100 gPD STATIC EXCITER.

l N !( CODE IDENT NO. SIZE DRAWING NO. I ArrD l 97520 A 99 0c47 l /sPPD l SCALE WT SHEET jga =

=... A77/cr,YFur *'6 b.line or onc l i fi.E Fiald Ins:cetion of the Low and l U" * ' spa, et cx1E oEPT ~ tene Cemeet Finners I His Vo ~ 99-0847 ~~} I"t BASLER ELEC. CO. SHEET 2 OF 4 F..

HIGHLAND, I L L.

PURPOSE: To ensure proper alignment of the low and high voltoge contact fingers of the [ drowout assembly. L I SPECIAL EQUIP /AENT REQUIRED: Crone with at least 500 lbs, capacity. ' C AUTION s ENSURE ALL OPERATING AND SOURCE { POWER 15 REMOVED BEFORE PROCEDING !t 2 i 1. Open the low voltage compartment door dire:tly below the drawout assembly compartment j and remove four (4) red bolts trom the inside top panel. 1 ~ 2. Unlock and open the diawout compartment daors. 3. Disconnect the ground strop at upperright front corner t>f draweut assembly. I 4. Attach lifting chains to two (2) reinforcing holes on top of drawout.cssembly (Ensure lifting chains are slock to ovoid domoge to cubicle). 5. Remove door lotching, and drawout assembly connecting rod hardware. l CAUTION DRAWOUT ASSEMBLY WEIGHS APPROX-i l lMATELY 500 POUNDS, EXTREME CAUTION MUST BE OBSERVED WHEN REMOVING OR g l POSITIONING ASSEMBLY. 1 i 1 1 6. Remove the ground bus attached at the in;ide top panel of the drowout assembly comportment (Observe position for re-installation before removing). f 7. Slowly take up lifting chain slock as drowout as'sembly is pulled outward. 8. Ensure lifting chain is tout before finally removing drawout essembly. 9. Lower the drowout assembly onto a structure that y/ill safely support the ossembly's weight, yet provide easy access to the Icur contcet fingers located on the bottom of the drowout assembly. j ( \\ I

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A T i~A c et u.:r k t '"C 'Gnh or D AT f. H T'E Field Inspection of the Low and D'- ' l Hich Voltone Confoct Finoers 'ropa. ey CWTE DEPT 99-0847 __[ BASLER ELEC. CO. SHEET 3 OF 4

HIGHLAND, I L L.

i 1 10. Inspect the four (4) Low Voltage Contact Fingers ottoched to the bottom of the drowout assembly by performing the following steps: (See ottoched drawing 9115715100 sheet 3). a). Compare the contact fing~ers with Figure 1 below. j k l 0.5 in. Min. i Y [k ? i Figure 1 l ~ I s t (' b). Replace the contact fingers if necessary by performing the following steps: I 1). Remove four (4) bolts from the contact finger insulator block assembly. } } 2). Remove two (2) nuts and associated hardware from each contact finger. l t* 3). Install new contoc't fingers with original hardware. 4). Re-ossemble and install the contact finger ossembly. i 1 l 1 l 11. Inspect the three (3) High Voltage Contact Fingers attached to the back wall by performing the following steps: { o). Compare the contact fingers with Figure 2 below. I l 5 1 di i 0.9 in. Min. l v i ( i l Figur e 2 l -t l I ,n on..

.~ A TTA C H ME~7 "C r jbG.{ar , 04 : r. n T Field Inspurioo of tiic Low and !) 11101. Vol to.n C:.,nt xt Fin;pe,5 { ops ey mTE oter 99-0847 l b ='" BASLER FLEC CO' i' SHEET 4 OF 4

HIGHLAND, I L L.

{ t bl. i Replace flie consoci fingers if necessory by performing the following steps: l 1 l 1).. Remove two (2) bolts and associated hardware from each contact finger. 2). Install new contact fingers with original hoidware, j Ensure door lotching ports are clear of drowout creo and re-install drowout assembly. 12. 13. Re-install the ground bus (Ensure the three (3) High Vol> age Contact Fingers are behind the ground bus). r 14. Re-install door latching hardware and remove liIting chains. ~ ~15. Reconnect ground strop to upper right front corner of d/owout assembly and carefully I. slide the drowout assembly into position. i 16. Inspect cabinet and drawout area for fordign objects and dust occumulation. i .- 17. Secure and lock the drowout assembly doors. l l ( l 18. Re-install the four (4)ied bolts removed from the top panel of the low voltage compartment. { Attachments: Drawing - C9115715100 (sheet 3) I i it I 1' i l I I I t

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