,.,

f) TTflcll/14£/1/ TB_ i

SARGENT 8c LUNDY ENGINEERS

CHICAGO

Qualification of Mobil Oil Co. Greases Mobilux EP-0, EP-1, EP-2 and

Mobi lgrease 28

Prepared for Dresden - Units 2 & 3 and Quad Cities - Units 1 & 2

by Component Qualification Division

r:.

Project No. 6896/97-00 February 20, 1989

..

. . ~· -. :· .. - _,

. ---

·- .-

- - _; ..:--..

. '·._n.'

-·,.··,I .- _- .·., '.

- .... :.~· _:-- ---

··cQo-042027 ~ev·. oo· ·

)

;· -- ' - -'~~ - .... ~

·-.... - ..

.-· .<

' -~-- .... ·. - ) ~~- -~ . ~ i ~:

REV. DESCRIPTION.

00 Original Issue

' . .

'•, •.

•"'" ·.· ..

·'.",· .- • '!

I

'

··'

,. : '

.... . ... '\ , ... . . ;·.-:1:·

•. ,·.·, ·' i'

• - : • '1 • ':. ' ~. ·~ ., " :

"ISSUE SUMMARY:,.:: ... ·' . •• ( r: ... .

F1352.001 01-89 .

... '.•.

/

RESPONSIBILITY SECTIONS DATE

PREPARED BY: ~ .~~ /? f.af ~ :z_ -17- !fy REVIEWER COMMENTS & SIGNATURE :

~ /?/a/uy-lt-C~rJ:'if .. IJ., r~~ /-a/. ~/- 2-/7-Jf REVIEWER COMMENTS & SIGNATURE: v 1

A){) CDIH M.L-n ../! ()ta 2·ZO-.$T ,,t6~~

APPROVED BY: ,,---t}6·r?ntx:f.),,b(/V1.A._ Z- 2- 0 -89. - , PREPARED BY:

REVIEWER COMMENTS & SIGNATURE:

REVl.EWER COMMENTS & SIGNATURE·:

APPROVED BY:

PREPARED BY:

REVIEWER COMMENTS & SIGNATURE :

REVIEWER COMMENTS & SIGNATURE :

APPROVED BY:

PREPARED BY:

REVIEWER COMMENTS & SIGNATURE:

REVIEWER COMMENTS & SIGNATURE :

APPROVED BY:

COMPONENT ·· ,, ·QUALIFICATION

DIVISION 11 SARGENT ~ LUNDYU PROJ. NO.: 6896197- 00

' ENGINEERS COD - ~0..:..4=-28:::..:2=-7.__ __ _ ·-,

•

PF~CJJ. NOS. ; 68~6 /97-00 CALC. NO. :CQD-042827 REV.00 DATE:02/20/89 PAGE 1 of 1121

1. G PURPOSE

The purpose of this analysis is to environmentally qualify Mobil Oil Corporation's Mobilux EPO, EPl and lP2 and Mobil grease 28 for use in Limitorque actuators at the Dresden and Quad Cities Nuclear Power Generating Stations.

2. 0 REFERENCES

1. Wyle Report #17019-01, Nuclear Environmental Ql1alification Test

Program on Mobil Greases for Limitorque Actuators, dated 02-08-89,

Preliminary Report.

2. CQD-017511, CQD-017504, CQD-01/510, CQD-017512 and CQD-017509,

Environmental Qualification of Limitorque Actuators, Dresden -

Units 2 & 3.

3. CQD-017515, CQD-017517, CQD-017514, CQD-017516 and CQD-017513, Environmental Qualification of Limitorque Actuators, Quad Cities -

Units 1 & 2.

4. CQD-015890, Environm~ntal Qual.ificatio~ of Mobil Greases, D~esden -

Units 2 & 3. ••• ·.1

-- - . ~ .. -· 5. CQD-015891, Environmental Qualification of Mobil.Greases,-:Quad

. - · ...

Cities - Units 1 & 2.

6. Letter from (D. K. Yoshida) Nutech to (Z~J .. Bcixer)-CECo~·~ated: .--·

• •••. • !.:-

~. .. ... --.- ',,_.;.·

. -; ' ·.··~.-.... . ·,: :.. .. · .. _.- ~-- ' . ;···-:·-~,·

PROJ. NOS. :6896/97-00 CALC. NO. :CQD-042827 REV.00 DATE:02/20/89 PAGE 2 of 10

3.0 EQUIPMENT DESCRIPTION, LOCATION AND FUNCTION

Per References 4 and 5, Limitorque valve actuators at Dresden and Quad

Cities use two types of lubricants:

Mobilux EP Greases for actuator· main gear box

Mobil grease 28 for actuator Limitswitch gear box.

Per References 2 and 3, the following are the EQ actuators, their

location in the plant, environmentai conditions and operability

requirements:

.-:.....

:.- . •'

.,._ .. ·· . '

. :- ,:_. - .. ~-' ·:: ~.~ .. ....

. -1. -

Tl'G Ml:lER

MO- I - 1

. TAG UMl:lEF<

MO-L-1402-~ ·lA ,d

M0-2-1 -if12- .h.:1, b

M0-2-140:;: .. ~c-,f, ,B M0-2-230 I - ::'.5 M0-2-1501-1 li'.,B M0-2-1501 -21A,8 M0-2-1501-2711,8 M0-2-1501-2!3A,8

M0-2-1501-32A,B M0-2/3-7504A,8 M0-2/3-7505A,B M0-2/3-7507A,8 M0-2-1201-2,3

M0-2-1201-1 M0-2-120 I -1/-. M0-2-3706 M0-2-220-1 M0-2- 1 50 I - 3/, , 13 M0-2-2301-4

~-?-202-7A,B

-2-202-51'. ,B

M0-2-2301-5 M0-2-2301-8 M0-2-220-2 M0-2-205-2-4 M0-2-1301 -2 M0-2-1301-3 M0-3-2301-3n

M0-2-1001-IA,B M0-2-1301-1 M0-2-1301-4 M0-3-1001-11'. M0-3-1201-1 M0-3-1001-IU

•

: OCAT I ON

1Zone 28, 26)

(Zone 28, 26)

torus llPCI Room SE/SW Corner Room Torus (Zone 11, 24) (Zone 11, 24)

SE/SW Corner Room (Zone 30)

•

PROJ. NOB. a6896/~7-00 CALC. NO. :CQD-042827 REV.00 DATE:02/20/89 PAGE 5 of 10

Hence, the worst case environment for the subject gi·eases is as surrunarized below:

Parameter

Temperature (°F)

Pressure

Humidity

Spray

Radiation

4.U SIMILARITY ANALYSIS

Normal Service

150°F

14.7 psia

20 - 901'

2.0E06 Rads

LOCA/HELB

O to 30 min

30 - 70 min

70 psia

100%

Demineralized Water

l.1E07 Rads

Mobilux EP-0, EP-1, and EP-2 are used in Limitorque operators at Dredsen

and Quad Cities stations. Per Refernce l, only EP-1 and EP-2 were

tested to the postulated environmental condi_tions. Mobi lux EP-0 ·is

qualified by material similarity to the tested EP-1 and EP-2

forumlations. Per Mobil Oil Corporation Product Data Sheets, all three

greases have the iame base oil thickening agents and additives.

Typically the composition is as gi~en below:·

CHARACTERISTIC NLGI No. Structure Soap Type Color Penetration at 77°F (25°C)

Unworked, min-max. Worked 60 strokes, min-max.

Dropping Point, min °F (C) Mineral Oi I % Viscosity of Oi I

SUS at 100°F

MOl:llLUX EPO 0 smooth

MOBILUX EPl 1 smooth

MOl:llLUX EP2 2 smooth

Unleaded Lithium 12 Hydroxystearate Me:j i um brown Medi um orown Medi um brown

3'.>0-390 355-385 340 ( 171) 92

900

305-34~

310-340 340 ( 171) 89

900

260-300 265-295 350 ( 171) 87

900

•

PROJ. NOS. : 089€:-/97-00 CALC. NO. :CQD-042827 REV.00 DATE:02/20/89 PAGE €. of 10

SUS at 210°F 7C/80 70/80 70..'80 cSt at 40°C 1 70 170 170 cSt at 100°c 13.0;16.0 23.0/2c .o 13.0/16.0

I i mhe;n OK Load. min. I b (kg) 40 ( 18) 40 ( 18) 40 ( l(l) l(us 1 Test ASTM D 1743 Pa~s Pass Pas;, l:lomb Oxidation Stabi I ity #PSI Drop ma-

• 6. 1

PROJ. NOS. 16896197-00 CALC. NO. :CQD-042827 REV.00 DATE:02/20/89 PAGE 7 of 10

Normal Radiation Exposure

Thermal Aging

Accident Radiation Exposure

Penetration, Dropping Point and IR Tests

Cyclic Aging

DBE Simulation Test

Penetration, Dropping Point and IR Tests .

Penetration, Dropping Point and Mobil IR Test

ASTM 0-217 - Cone penetration ot lubricating grease - Measurement of the grease consistency by penetration of a stari~ard cone.

ASTM D-566 - Dropping point of. l.ubricati.ng-·greases ·,_·- Measu_r~meni· 'c»t". :\.;. the dropping point of the grease as an indfcation'of the n1aximu~ ·.-.: •.

·.temperature that it can be exposed .to without.iiquificationor oil.: .. - . ". '.

separation.· · .. · ... • ' L ~· '• ' •

' "1 .

The tests were performed on gre:ase'.samples _in b_qth i.Jnwo~ic'eiJ a11d· .:-. ·.:·':·· l '- • .. I_.,•

·_ .. · . .:,_ . -- . '""" ·:

L. - ..

worked conditi ans. · At· 1 east- 6.0 strokes:. were given :Prior. t6. -pe.ff-~rm-:' ·= >~:.-~~- .. . -- -· . -_- - - :: . - - . . :· - ': ;. . . . . . ...... . :, ._ . - . . : -. -·

ing worked test.. .. ·- ... "' .-:;_:- .. -·-. ··.·· . .,, .·

IR testing was performed on worked samples at Mobil Oil Cor.poration. =; (Results of IR testing are not currentlj included ih Reference 1).·

6.2 Normal Radiation Exposure

, ~ ..

•

PRO.J'. NOS. :6896/97-00 CALC. NO. :CQD-042827 REV.00 DATE:02/20/89 PAGE 8 of 10

The greases were placed into static containers and irradiated to a level of 2.2E06 rads gamma air equivalent which envelops the required radia-tion dose during normal service operation.

6.3 Thermal Aging

Per Reference 1, Section 10, the samples of greases were thermally aged at 250°F for 100 days.

6.4 Accident Radiation Exposure

6 c • J

The grease samples were irradiated to a level of l.1E07~rads at a rate

of l.OE06 rads/hr using a Co-60 source. This meets the plant's require-ment for 40 years plus accident.

Cycle Aging

After thermal aging, radiation and the ASTM tests, ih~ grease samples

were placed in each of three Limitorque actuators. The Mobilux EPO, EPl

and EP2 were used in the main gear case and Mobil Gi·ease 28 was- used in

the L imitswitch gear case. The actuators were then cycle tested to

simulate at least 120 full stroke ·and return cycles.

6.6 Accident Simulation

After cycle aging, the actuators:~ere pl~c~d in ~n -~~vir~~~ental c~~mb~r ... and subjected to an accident test simulating the 70 minute OBA .. · · ' ..

requirement as given below:

for for

30 minutes 40 minutes

,. .

The Limitorque actuators (including lubricants) inside ~rywell are re-quired to remain operable for up to one hour after any OBA •. The worst

PROJ. NOS. :6896/97-00 CALC. NO. :CQD-042827 REV.00 DATE:02/20/89 PAGE 9 of 10

case peak temperature during any DB~ for which the ~ubricants are re-

quired to be qualified is 334°F in the drywell. This value has been

enveloped by the test with a margin of 15°F.

The actuators outside drywell are required to remain operable for up to

one year after any OBA. The only harsh parameter dt1ring a LOCA is radi-

ation. The HELB parameter for these actuators is less severe than that

of the inside drywell actuators and; therefore, is enveloped by the

test.

6.7 Pressure

The peak pressure during the accident test was 71 psia. This pressure

exceeds the postulated worst case pressure of 62 psia in the drywell.

Pressure qualification is; therefore, considered acceptable.

6.8 Humidity

6.9

During the accident test, the actuators with greases were subjected to

steam/100% RH environment for 70 minutes, which simulated the actu~l in-

stallation requirement.

r ... :_

Demineralized Water Spray ':.

The spray requirement for Oresden and Quad Citie·s Stations is _dem.irera..:·

..

lized water spray and is manually initiated. During the-acci.de.nt~·test~ .·"· >< : : ~-- _ . . - .·• ~ - ' - ·.;- . .. - .

a demineral1zed wa-ter spray was initiated after 30 minutes into the test· -·~., ... ··.\:. . • · .. " • : ." r .- : •• · .. , - • •.. , .. - .. ·:·. • i- . .,r-: .- '.

and continued for the remaining 40 minutes.of·the_test.''The''spray·rate·:.-. >··:·:'. :-used was 0.15 gpm/ft 2• .-.- . -~-- .. __ '· .. · .'

- .

6.10 Submergency

There are no submergence requirements fo~ the Limftorque actuators (with

lubricants) at Dresden and Quad Cities.

•

..... _

6.11 Performance Evaluation

PROJ. NOS. : 6896 /97-0121 CALC. NO. :CQD-042827 REV.00 DATE:02/20/89 PAGE 10 of 10

The actuators, lubricated with thermally ageL1 and irradiated greases,

were cycled for 120 full cycles before the accident simulation test.

The values of motor current and the timing of each ~troke were recorded

(Appendix VI of Reference 1). The actuators cycling was performed at a constant calculated load (Appendix IV of Reference 1).

6.12 The Greases Life Evaluation

In the calc~lation (provided with Reference 6), the activation energy -

values were determined for each type of grease at temperatures ranging

from 155°F to 265°F. These calculations are based on the oxidation

testing performed in accordance with ASTM 0942 by Mobil Oil

Corporation. Since the activation energy values vary as temperatures

vary, it is not practical to use Arrhenius formula tor determination of qualified life of the greases.

Reference 7 (Page 9) and Reference 8 (Page 505) indicate that the aging

of lubricants follows to the 10°c rule which states that life doubles

with every 10°c temperature decrease.

With thermal aging at 250°F for 100 days, the qualified 11fe·of the· greases, based on 10°c rule, will be a.t least 8 years at ·1so°F~ :·This· value of grease life corresponds to t~e greas~s' life curves iimlt~

provided on Pages 8, 9 and 10 of Reference 6.

7. 0 CONCLUSION . _:. ..

The preliminary test report (Reference 1) and its evaluation indicate that the tested greases met the acceptance criteria and are qu~lified to the intent of NUREG-0588 with a quali~ied life of at least 8 years •