ML20141P181

Rev 00 to Justification/Analysis:Environ Qualification of Square D Pressure & Temp Switches

ML20141P181
Person / Time
Site:	Fort Saint Vrain
Issue date:	01/29/1986
From:	SARGENT & LUNDY, INC.
To:
Shared Package
ML20141P178	List: ML20141P177 ML20141P181
References
CQD-027095, CQD-027095-R00, CQD-27095, CQD-27095-R, TAC-42527, NUDOCS 8603190119
Download: ML20141P181 (24)

Text

-

ENCLOSURE 3 CAR 2 ENTO LUNDY ENGINEERO CH3CA10 t

t JUSTIFICATION / ANALYSIS

\\*

.4 t

i i

o Project No.:

7390-00 COD File No. : s027095 t

Volume:

EO-FSV14 Rev. 00:

Date 01/29/86 8603190119 8o0314 ADOCK 05000267 PDR PDR p

_ _ _ _ _ _ _ _.... _ _ _. _. _, _., _ _. _ _. _ - - _ _ _ _ _ _., ~ -., _ -

~

i ANALYSIS & CONCLUSIONS SECTION Table o.f Contents- - -

p

~ C3-Objective...........................................

C3 References..........................................

C4 Assumptions.........................................

C4 Equ i pme n t De sc r ip t i o n...............................

C5 Performance Requirements / Acceptance Criteria........

CS Service Conditions..................................

C5 Method of Qualification.............................

C7 DBE Conditions......................................

C7 Similarity Analysis.................................

C8 DBE/ Post-DBE Qualification..........................

Cl3 Thermal Aging Analysis..............................

C15

).

Cyclic Aging........................................

C16 4

Accuracy Calculations...............................

C17 Radiation Aging Analysis............................

C17 Submergence.........................................

C17 Synergism...........................................

C17 Humidity............................................

C17 Chemical Spray......................................

C18 Disposition of Anomalies............................

C18 Response to IE Bulletins / Notices....................

Maintenance / Surveillance Requirements...............

C19 C19 Conclusions.........................................

C20 Appendix I..........................................

l COD No.:

027095 volume No.:

EO-FSV14 Rev.:

00 Project No.:

7390-00 i

)

I

,a-

-~.

hks.Fw Environm3ntnl Qu91ifiention of Cnc. g, COD-027095 IWWRGENTbLUNDY Square D Pressure & Temp. Switches R ev.

00 een C " *C ^ "

X Safety-Reisted Non-Sofety-Reisted Page C3 Public Service Co. of Colorado houw by Deu Cwn Project Fort St. Vrain Revesed by Date Prei. No. 7390-00 z,e;,. we. See Tab D a,,,,,og 3, g,,,

1.0 OBJECTIVE The purpose of this report is to analyze the subject safety-related equipment for the ef fect of normal service time / temperature aging, identify age susceptible materials used in the equipment, demonstrate operability of the safety-related equipment during and af ter a Design Basis Event (DBE), and establish a maintenance and surveillance gp program.

The aging analysis will be performed per DOR 4

Guidelines of IE Bulletin 79-01B.

2.0 REFERENCES

1.

Wyle Report #57705-7, Aging analysis of Square

'D' pressure switch and temperature switch models 9012 and 9025 used in Public Service Co. of Colorado's Fort St. Vrain Nuclear Power Plant, Rev.

A, dated

~.

11/22/85.

v 2.

Wyle Report #58084-2, steam line rupture (SLR) qualification test on pressure differential switch, part #ACW31538B9G1 Class 9012, Serial #271 for General Atomic Company (GAC), dated 8/10/76.

3.

Wyle Report #57504-10, SLR qualification test on temperature switch Type BCW-42, Class 9025, Form LA16 for GAC, dated 9/14/76.

4.

COD File #022959, Rev. 00, " Fort St. Vrain 35 Year Temperature Histogram for Normal Plant Conditions".

ia 5.

COD File #027090, " Version IV of DBE Temperature / Humidity Profiles for Reactor and Turbine j

Buildings" (Preliminary).

9 8

s 6.

Southwest Research Institute Document #06-6073-TR66, 2

dated 11/84, " Nuclear Component Qualification Test Report Square D 9012-ACW-25 Pressure Switch".

7.

SWRI Document #06-6073-TRll6, dated 11/84, " Nuclear Component Qualification Test Report Square D 9025-BCW-45 Temperature Switch".

8.

Durez Bulletin #328.

+

hks.Fw Environm7ntnl Qunlifiention of cose. No. COD-027095 SARGENT'e LUNDY Square D Pressure & Temp. Switches R..

00 onto X

C '**C ^

Safety-Related Non-Safety-Related may C4 et ci., Public Service Co. of Colorad hostW W Oate heint Fort St. Vrain R=*md b Date hoi. No. 7390-00 i,i,. no. See Tab D 4,,,,,*d W Dew 9.

" Design Guide for Reactor Cover Gas Elastomer Seals",

Atomics International, Division of Rockwell International, Document #AI-AEC-13145.

~

10.

Parker 0-Ring Handbook, dated 3/82.

11.

PSC letter #NDG-86-0108 dated 1/23/86 transmitting Environmental Qualification Master Equipment List.

l-12.

Square D Company Catalog Section dated'1/,82, 4

Class 9012.

13.

Square D Company Catalog Section dated 1/81, Class 9025.

14.

Engineering Evaluation of Fort St. Vrain Component Operating Cycles (EE-EQ-002, Rev.

A, dated 8/21/85.

~.

3.0 ASSUMPTIONS 1.

Metals are insensitive to environmental effects and therefore due to their high heat resistance properties are not age sensitive.

2.

No internal heat rise above the ambient due to switch operation is expected (delta t = 0).

4.0 EQUIPMENT DESCRIPTION The subject of this analysis is Square D temperature and pressure switches.

The following is the list of switch models and tag numbers taken from Reference 11:

Tag No.

Item Description Manufacturer /Model #

Location g

PS-8208 Pressure Switch Square D/9012-ACW-25 TB2 E

E PS-8214 9012-ACW-25 TB2 PS-8221 9012-ACW-28 TB2 PS-8222 9012-ACW-28

'TB2 PS-8247 9012-ACW-25 TB2 PS-8248 9012-ACW-28 TB2

hka.Fw Environm"ntnl Qunlific9 tion of CWc. N,. CQD-027095 SARGENTb LUNDY Square D Pressura & Tamp. Switches nn. 00 on.

C ".c a c.

X s,s.,_ n.a.i.e

n. _s.s. y n.s..e pe,.

C5 ef Public Service Co. of Colorado g,,,,

houd by On.

heint Fort St. Vrain nwoud by Det.

Proj. No. 7390-00 g,;,.n.,

See Tab D Aperev.d by 0.t.

Tag No.

Item Description Manufacturer /Model i Location TS-8208 Temperature Switch Square D/9025-BCW-42 TB2 9025-BCW-42 TB2 TS-8214 TS-8218 Temperature Switch Square D/9025-BCW-64 TB2 9025-BCW-64 TB2 TS-8219 i

f TS-8236 9025-BCW-43 TB2 TS-8237 9025-BCW-43 TB2 TS-8245 9025-BCW-43 TB2 9025-BCW-42 TB2 TS-8246

~.

5.0 PERFORMANCE REQUIREMENTS / ACCEPTANCE CRITERIA A pre-operational test, operational test during the DBE test, and post-operational test were performed per GAC Specification 93-I-530 to monitor the performance requirements.

The tests were conducted as described in References 2& 3, Page 2.

The test specimen operated at all times per GAC Specification 93-I-530 (References 2&3, Pages 3& 4).

Setpoint deviations during the test are evaluated later in Tab C.

6.0 SERVICE CONDITIONS

}

The subject pressure and temperature switches are located u

in environmental zone TB2.

The time / temperature histogram per Reference 4 for the normal service conditions of Zone TB2 is provided below:

g Temperature (OF)

Duration (days) f 105 2723 Period I 95 2756 Period I 105 5040 Period II 95 2160 Period II L

. - _ _ _ _ _ _ _ _ _ _ _. _ _~

l hk.r. COD-027095 Cdm.Fw Environmental Qualificntion of e

ttRGENT4LUNDY

.en : --

Squnro D Prasaurn & Tsmp. Switchas n.

00 osee C * * *C ^ e, X

l lNen-seseiy-neietes Pese C6 g,,,,,_ neisies

.(

c,.., Public Service Co. of Colorado h o w w by Date Project Fort St. Vrain naisses by Date Prej. No. 7390-00 j s, no. See Tab D a,,,e,og b, pese 7.0 METHOD OF QUALIFICATION The Square D pressure and temperature' switches are qualified to 79-OlB requirements.

Therefore, the qualification for thermal aging is done by analysis.

The DBE qualification is performed by a combination of type testing and analysis.

7.1.

Service Life Evaluation g

I 1.

All non-metallics that are subject to temperature aging were identified.

2.

Utilizing the minimum activation energy value (eV), the amount of required aging at a 105 F reference temperature was calculated based upon the 35 year plant requirements (Reference 4).

3.

The life consumed for the entire 30 day g

DBE/ post-DBE period is calculated based on the s_,

0 105 F reference temperature and added to the results obtained in Step 2 above.

4.

Utilizing aging test data (References 6 & 7) the 0

qualified life is calculated at a 105 F reference temperature and compared to the results obtained in Step 3 above.

7.2 DBE/ Post-DBE Evaluation "g

1.

High temperature peaks postulated for the plant DBE are enveloped by the test with significant u

margin.

g n

g 2.

Operability for the duration of the SLR te3t was demonstrated by successful functional testing e}

during the DBE simulation and post-DBE functional testing.

3.

Qualification af ter the termination of the SLR test is demonstrated by analysis of the-materials and their specific properties relative to their contribution to switch operation.

i 1

e

.m,

,-,e

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• • "C^"

E Safety-ReletW Non-Safety-ReistW Pep C7 et

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Public Service Co. of Colorado Cient howW hy Date Project Fort St. Vrain Revesed by Date Proi. No. 7390-00

,,;,. we, See Tab D 4,,,e,,4 m,

nei, 4.

The thermal stress induced during the entire DBE 0

at a reference temperature of 105 F is calculated in Appendix I to' verify that the total thermal stress induced during the entire DBE/ post-DBE is a fraction of the qualified life.

8.0 DBE CONDITIONS

\\

Per Reference 5, the following are the DBE ' conditions f

(combined line break profile) for the Square D temperature and pressure switches:

Temperature Dura tion (OF)

(minutes)

$ O

^

100-200 0.03 4

200-300 0.07 300-330 0.05 360-360 0.10 330-300 0.05 300-160 0.70 160-170 0.50 170-170 1.40 170-185 4.60 185-195 9.50 195-170 53.0 170-150 50.0 l

150-120 380.0 120-120 42700.0

}

Total 30 days a

9.0 SIMILARITY ANALYSIS 3

n Square D temperature switch Model 9025 and pressure switch oj Model 9012 (which were DBE tested) are similiar to the j

Square D temperature and pressure switches installed at the Fort St. Vrain Plant, since the tested and installed switches are the same model with the same materials of construction.

Furthermore, the materials application for both the Square D temperature and pressure switches is the same even though the model numbers are different.

The following are the non-metallic materials in the Model 9025 Square D temperature switch and the Model 9012 pressure switch 4

hks. Fn Environm7ntnl Qunlification of cge. r. CQD-0270 9 5 e

SARGENTbLUNDY Squnre D Proneure & Temp. Switches R.

00 cow X

Safety-Related Wen-Sofety-Releted page C8 et C"c.o ci.,, Public Service Co. of Colorado houw by Deie hem, Fort St. Vrain Rwomw by cate hoj. No. 7 39 0-00

,;,. ne, See Tab D Apermed by Data Snap switch insulator - Phenolic Gasket - Silicone Rubber The remaining parts of the temperature and pressure switches are metallic and, therefore, are not age sensitive.

10.0 DBE/ POST-DBE OUALIFICATION

).

10.1 DBE e

The test specimen was subjected to a 30 minute DBE test.

Qualification for the DBE will be justified by performing a comparison of the tested and plant profiles.

The plant and tested DBE profiles are shown in Figures 1& 2.

The test specimens were subjected to SLR testing, per Reference 2, Figure 2, Page 17 and References 3, Figure 2, Page 16 as follows:

1.

Test Profile for Pressure Switch Model 9012 (Reference 2,

Page 17)

Temperature (OF)

Dura tion (Minutes) 110-440 1

440-504 1

504-515 1

515-504 1

504-311 1

311-310 8

g 310-264 7

264-252 10 5

2.

Test Profile for Temperature Switch Model 89025 a

8 (Reference 3, Page 16) i O

Celse.Fw Environm'ntnl Qunlifiention of Cele. No. CQD-027 095 i

SARGENTf LUNDY Squnra D Prennurs & T3mp. Switchen new. 00 pese j

C * * *C ^ G C X

biety-nelesw Nw-bfety-nelesw

% C9 et f

d ca., Public Service Co. of Colorado hwnd by Date Project Fort St. Vrain naissed by Does Prei.me. 7390-00

g ge, See Tab D Approved by Deen l

Temperature (OF)

Duration (Minutes) 185-470 1

470-516 1

516-526 1

526-504 1

504-330 1

330-328 1

1 328-328

'4 P

328-316 2

0 316-304 2

304-284 2

284-270 4

270-240 10 Referring to Figures 1& 2 which graphically depict

~i.

both the tested and the plant DBE profiles it can be i

_j seen that for the first 30 minutes the tested peak temperature (approx. 520 F) envelopes the plant peak 0

temperature of (approx. 360 F) with significant margin.

The tested peak temperature duration at 520 F also envelopes the plant peak temperature 0

duration at 360 F.

Although a mismatch in rise times exists between the plant and tested profiles for the initial transient, which can be attributed to test facility limitations, this mismatch can be considered negligible based on the following justification:

}

1.

The tested switches were wrapped with 3 inches of u

insulation.

The plant switches are required to be wrapped with 3 inches of insulation per Tab E.

j a

g 2.

Switch internals that are housed in a NEMA type 13 e

enclosure, wrapped in 3 inches of insulation, cannot 2

be significantly affected by the short duration accident peak temperature.

3.

The switch internal temperature rise would be higher 0

due to a 44 second temperature rise to 520 F, (tested) than a 9 second rise to 360 F (plant).

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Celes. Fee Environm7ntol Qunlificntion of Colc. No. C Q D - 0 2 7 0 9 5 SARGENT4 LUNDY Square D Pressure & Temp. Switches nn. 00 one en--_

C'"C^*

X Safay-RolmW Non-SofMy-RelHW Page C12 et Public Service Co. of Colorado Cient honW hy Data Project Fort St. Vrain n.,,esed by Den Proj. No. 7390-00 g,;,.m.,

See Tab D 4,,,,,,, 6, o,,,

The switch internal temperature would rise more due 4.

0 to the test duration at 520 F than the 6 second plant duration at 360 F.

0 Considering the construction of the temperature and pressure switches, the non-metallic internals, i.e.

phenolic and silicone rubber that are housed in a NEMA type 13 enclosure, the thermal conditions imposed by the tested profile are more severe than those that would be g

f.

imposed by the plant profile.

4 Therefore, based on the above discussion, it is concluded that the thermal stress experienced by the tested switches is more severe than the thermal stress the switches would see during the initial plant transient despite the mismatch in rise times.

This is documented in Sargent &

Lundy CQD File #027843 and is available for audit purposes.

Discussion of the post-DBE including material analysis follows:

10.2 POST-DBE QUALIFICATION Per the manufacturers' published data (References 12

& 13), the switches are designed for a continuous 0

ambient temperature of 185 F.

The maximum post-DBE temperature (decaying to ambient) postulated for the plant is 185 F.

Furthermore, the Square D pressure and temperature switches have successfully performed their saftey function at the 5, 15 and 25 minute

}

intervals during the DBE and post-DBE (References 2 u

& 3).

Operability af ter the DBE is demonstrated by the post-DBE functional test.

In addition, research of the phenolics listed in the EPRI material data o

base has revealed a minimum continuous threshold temperature of 143 C (289 F), irrespective of the 0

2 phenolic's failure mode (Reference 8).

The phenolic material which is used as an insulator in the Square D switches has a corresponding failure mode attributed to a loss of flexural strength for it's specific application.

Thirty (30) minutes into the DB E, the phenolics are not thermally stressed since the maximum temperature after 30 minutes into the 0

DBE is 190 F which is siginificantly less than the 0

289 F minimum continous threshold temperature stated above.

Since it has been demonstrated that the

Calce. Fe, Environm*ntnl Qunlific'ition of Cele. No. COD-02 70 9 5

$ ARGENT %LUNDY I

00 oeie Squero D Prannure & Tamp. Switchen Rev.

i

• * "C ^ #'

X Sofety-Related Non-Sofety-Reisted

% Cl3 et cr.,, Public Service Co. of Colorado h ow W hy Date hojeci Fort St. Vrain RM by cete Proj. No. 7390-00 gg go, See Tab D Aw,eved by Dete properties of phenolics do not change at 289 F or below, which envelopes the post-DBE requirements of the plant, it is concluded that'the phenolics will maintain their physical properties during the entire 30 day DBE/ post-DBE.

In an application, similar to that for the switches, the silicone rubber maintained its 90% compression set even after exposure to a temperature of 505 F

).

(Reference 9).

Further evidence of silicone 4

rubber's ability to retain its retention property as a static seal is provided by Parker Seal Company.

This material resists 700 F temperatures for short periods and would maintain the desired material property (compression set) for 1,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> 0

at 450 F (Reference 10, Page A3-3 6 ).

Therefore, based upon the above and the knowledge that the silicone rubber is held in compression, it is also concluded that the silicone rubber will maintain its

_/

physical properties during the entire 30 day DBE/ post-DBE.

Demonstration of the switches capability to perform their intended safety function for the post-DBE is supported by References 6 & 7.

In these references both the Square D temperature and pressure switches 0

were aged at 125 C (257 F) for 108 continuous days.

After this thermal aging period, operability was verified.

This more than adequately envelopes the plant post-DBE requirements (time and temperature).

i Based upon the above discussion, it is concluded aj that during the 30 day DBE/ post-DBE period, the change in physical properties for the non-metallies is negligible.

The switches are capable of g

performing the intended safety function during the 2

entire 30 day DBE/ post-DBE period.

11.0 THERMAL AGING ANALYSIS The Arrhenius model is utilized in the evaluation 6f the switch's service life.

The service temperature during normal operation of the plant varies between 95 F and 0

105 F in the turbine building.

The Arrhenius parameters provided in Table 1, Page 7, Reference I will be used to l

l

hks.Fw Environmwntnl Qualificetion of Cde. No. CQD- 0 27095 ttRGENTbLUNDY Square D Pressure & Temp. Switches Rw.

00 oeis C "'c ^

• o X

Safey-Reined Non-SafHy-ReletW Pop Cl4 of

~/

Public Service Co. of Colorado

cige, howw by OHe heint Fort St. Vrain Rwand by Date Prei. No. 7390-00 g,;,. go. See Tab D a,,,end by Dets determine the qualified life of the non-metallic materials of the Square D temperature and pressure switches.

Arrhenius parameters used for the following non-metallic materials in the subject switches are:

1.

Phenolic (P = 0.64 ev)

S = 7396.48 S = Slope (Snap Switch Insulator)

I = -8.96 I

Intercept

=

2.

Silicone Rubber (7 = 0.86 ev)

S = 9987.54 9 = Activation g

(gasket)

I = -18.39 Energy (eV) 3

+

Utilizing of the Arrhenius equation in the following form:

Ef1

)

1 TAG = tSER OXP E \\TG T ER/

~

Where:

TAG = time of aging in hours

~ '.

tSER = time of service in hours sj Tgg = Temperature of aging in degrees Kelvin TSER = Service temperature in degrees Kelvin.

9 = Activation Energy (eV) k = Boltzmann's constant = 8.617 x 10-5 eV/ K Therefore, the qualified life can now be determined for the phenolic in the subject switches.

If the qualified life of the phenolic is greater than 35 years in the TB2 zone, then the silicone rubber is likewise qualified for at least that period since the phenolic is the weak link

material, i.e.,

lowest eV value.

"g 11.1 Required Aging at 105 F Reference Temperature for 0

3 the ETear Plant Life ( Re f'e r'e'IIce 4T 1

l As indicated in Section 6.0 of Tab C, the TB2 environmental zone has the following s

time / temperature histogram during the plant 35 year 2

service life:

Temperature (OF)

Total Duration (days) 105 7,763 95 4,916 For the phenolic, the required equivalent aging at 105 F for satisfying the plants' 35 year histogram 0

is as.follows:

i Calce. Fe, Environm*ntnl Qualificntion of Cele. No. CQD-0270 95 SARGENT4LUNDY Square D Pressure & Temp. Switches R=.

00 one E_ _ _ _..c A o o X

safety-ReletW Non-Sofety-ReiHW Pep C15 g

)

\\

Public Service Co. of Colorado g,4,,

hwed h Due heint Fort St. Vrain RwomW hy Oete Proj. No. 7390-00 g

i,.n..

See Tab D a,,,eved by Dete The equivalent duration for the, Phase I period (i.e.,

from January 1, 1974 to December 31, 1988 at 105 F is given by:

5 O.64x10

(

y 3bH

~

2723+ 2756 x exp B.617-

\\313.555 N

.s 365.25 g

12.38 years at 105 F

=

s-4 Similarly, the equivalent duration for the Phase II period (i.e.,

from January 1 1989 to September 17, 0

2008) at 105 F is given by:

5 0.64x10 y

y 1

5040+ 2160 x exp

/

365.25 0

17.66 years at 105 F

=

Therefore, the total required aging of the phenolic is:

0 12.38 + 17.66 = 30.04 years at 105 F 11.2 Equivaient Time Demonstrated by Thermal Aging Per References 6 & 7, a Square D pressure and temperature switch were each aged at 125 C (257 F) for 108 days.

Shown below is the equivelency of

}

this aging period at 105 F using the Arrhenius 0

methodology:

a Phenolic - (Life Consumed in 30 day DBE/ post-DBE = 0.16 0

g years aE 105 F per Appendix I) 5 0.64x10 y

y U.617 3I3.553

37B, 108 x exp 3

Actual Aging

=

3

.b 0

,45.03 years at 105 F

=

9

hks.Fw Environm7ntnl Qunlificccion of Cdc. ne. CQD-0 270 9 5 IWWRGENT4LUNDY e:__

Square D Pressure & Temp. Switches R=.

00 one c...c a o o X

Paes C16.:

Safav-rdmW Non-Sofety-RdetW j

c,,,, Public Service Co. of Colorado hgwd h Date Project Fort St. Vrain Revemed hv Date Prei. No. 7390-00 g,vi,.n.

See Tab D Approved W Ome The 35 year plant life (TB2 zone) plus'~the 30 day DBE/ post-DBE consume a total of 30.04 years + 0.16 years

= 30.20 years at 105 F.

Since the thermal aging 0

temperature of 125 C for 108 days equates to 45.03 years at 105 F, the combined plant normal service conditions plus 30 day DBE/ post-DEE period aging requirements are enveloped.

12.0 CYCLIC AGING

-g 4

Per Reference 14, the maximum cyclic requirements for both 9012 and 9025 switches is 2191 during the 35 year service life.

A total of 6210 cycles of operation under inductive loading conditions was performed o.n both the 9012 and 9025 switches.

The test items functioned normally at the conclusion of the operational aging (References 6 & 7).

Therefore the tested conditions envelope the plant requirements.

13.0 ACCURACY CALCULATIONS 1.

9012 Pressure Switch (Refer'nce 2, Page 13)

The 'hst"poTnt' pressure FoY' 5p'bn" ~pohltT6n~ was = 5. 6 psi.

The mcximum deviation during DBE and post-test operation check was - 0.4 psi, So the percentage deviation fc "open" position for DBE was =

- 0.4 x 100 =

- 7.24%

5.' E Similarly for "close" position the percentage i

9 deviation for the DBE was =

- 0.3x100 =

-i%

5

-- 5'.TF--

So the deviations in the setting pressure during the g

DBE are as follows:

E}

Open + 0

- 7.14%

Close +0

- 6%

i l

a Cdu.F, Environmentnl Ounlifiention of hac.ne. CQD-027095 SARGENT4LUNDY Square D Pressure & Temp. Switches n.

00 on,e C ***C ^

• X sefety-neisted Non-sefety-neinted Pass C 17 g j

Public Service Co. of Colorado gi,,,

howW by Date heint Fort St. Vrain RwomW hy Date Prei. No. 7390-00

g. ;,. ne. See Tab D Awned by Date 2.

9025 Temperature Switch (See Reference 3, Page 13)

W set p6 Tnt'~ temp'erature for " ope'n* position was =

~

206.67 F (average).

The maximum deviation during 0

DBE and post-test operation check was + 10.33 F and 0

- 6.0 F.

So the percentage deviation for "open" position for DBE was

\\

+ 1g.33x 00 and 6x 1.e.

+ 5% and - 3%

=

-7 The set point temperature for "close" position was 177.33 F (average).

Similarly for "close" position the percentage deviation for the DBE was 0

+ 0.66 Fx100 and - 2.66 Fx100 1.e. +0.5% and -1.5%

~ T7733~

177.33 --

So the deviations in the setting temperature during

_; I the DBE are as follows:

Open + 5%

-3%

Close =+ 0.5%

1.5%

The above deviations during DBE shall be incorporated into the normal calibration procedures for Fort St. Vrain.

See Tab E.

14.0 RADIATION AGING ANALYSIS The process fluid (steam or feedwater) is not contami-nated, and therefore, no radiological concerns are g

directly associated with the DBE.

Design Basis Accident a

No.

1,

" Permanent Loss of Forced Circulation", discussed 2

in the Appendix D of the FSAR, provides the worst case radiological conditions, but the overall radiological concerns are minimal, and accumulated doses (less than 1000 rads, TID) would have no operational effect on the equipment.

Cda.Fw Environm7ntnl Ounlifiention of hic. No. CQD-0 270 95 SARGENTkLUNDY Square D Pressure & Temp. Switches ne..

00 ce setety-neisted non-sefcy-neast d pny C18 og C "'C ^ o X

c,,,, Public Service Co. of Colorado howw by Date propet Fort St. Vrain Recomed by Date Prei. No. 7390-00 gg,. go, See Tab D Ape,eved by Date 15.0 SUBMERGENCE All switches are above the turbine. building Flood level.

Therefore submergence is not applicable.

16.0 SYNERGISM l

No synergistic effects are presently known to exist for the non-metallic materials of construction of the Square D g

s-temperature and pressure switches.

O 17.0 HUMIDITY l

During the DBE, the humidity level.can reach 100%.

In order to maintain the qualification of the switches, a qualified seal at the conduit entrance is required, See Tab E.

18.0 CHEMICAL SPRAY Chemical spray is not utilized at Fort St. Vrain.

lb.0 DISPOSITION OF ANOMALIES 1.

Per Reference 2, the chamber pressure was monitored 1

during the test and was found to be within + 0.5 psi limits.

This was considered satisfactory a6d was waived by GAC personnel as a continuing system requirement.

2.

Per Reference 3, the following deviations were

}

identified:

a 9

a) During the visual inspection, it was noted that the specimen part number was BCW42, Class 9025, o

Form LA16 instead of BCW43 as listed in Paragraph 5.1 of GAC Specification 93-I-530.

E Both the part number BCW42 and BCW43 are similar, having the same materials of construction and therefore this deviation is insignificant, b) The deviation mentioned on Page 22 of Reference 3 concernino the wrapping of the specimen with 3 inches of fiber glass insulation is considered a test set-up anomaly.

The probe capillary tubing and specimen was wrapped with 3 inches of fiber l

Celes. For Environm7ntal Qunlificntion of Cele. No. COD-0270 95 SARGENTfaLUNDY Square D Pressure & Temp. Switches Rev.

00 osis en :- _ _ _

C'"C^o X

g,,,,,_ n,g,,g g,, _ g,,,,,_ g,i,,w p

C 19.g

.\\

/

c,, Public Service Co. of Colorado properw by Date Project Fort St. Vrain novis w by Date Prei. No. 7390-00 g,;,.n..

See Tab D Appre,w by Dess glass insulation due to the short distance (6 inches)'between the specimen and the stream-line rupture simulation entrance.

The Square D switches will be exposed only to a peak 0

temperature of 360 F for 6 seconds during the DBE whereas 0

the test specimen was exposed to temperatures above 500 F during the DBE simulation.

The 9012 Square D pressure 1

switch (9012 and 9025 Square D have the same materials) f-which had no such wrapping has successfully operated even 0

after exposure to accident temperatures above 500 F.

Since the plant peak accident temperature is significantly less severe than the tested peak DBE temperature, this anomaly is judged not to impact the qualification of the 9025 Square D temperature switches.

20.0 RESPONSE TO IE BULLETINS / NOTICES Not applicable, sinse no I'E Bulletins have been iseued for j

either the Square D temperature or pressure switches to date.

21.0 MAINTENANCE /. SURVEILLANCE REQUIREMENTS.

1.

The set point deviations that occurred during the DBE test must be incorporated in to the normal plant calibration procedures.

See Tab E.

-2.

All the Square D switches must be sealed with a qualified seal at the conduit entrance.

See Tab E.

9 3.

The 9012 pressure switches and 9025 temperature

}

switches must be wrapped with 3 inches of fiber glass insulation and sealed with fibsc glass resin.

Ej 2E0 CONCLUSIONS f

The subject Square D temperature and pressure switches (Models 9012 and 9025) installed at PSC's Fort St. Vrain Nuclear Power Plant are qualified to DOR Guidelines of IE Bulletin 79-OlB requirements for 35 years plus DBE/ post-DBE provided the maintenance and surveillance requirements in Tab "E" are implemented.

Celes.Fw Environmantal Ounlification of csic. u s. CQD-027095 SARGENT4LUNDY Square D Pressure & Temp. Switches nov. 00 con C " *C ^ o X

safety-neimes men-seleey-neineed Pne C20 of

.i Public Service Co. of Colorado

~

gi..,

wed by Deu Preisc, Fort St. Vrain neveued by Dee.

. Prei. No. 7390-00 is me. See Tab D a,,,eved by Does 1*.-

4 V

APPENDIX I 4u S

n 2

.I o

e.,

-,_.g..-

,s,.

-.__,n

,..,..--..-,n.

-,_,-,-.,-,-,-,n-.,

~,,..--.,,.,,,.,.-m.,-.--,.-

Colce.For Environmnnt*11 Qualification of Cele. N. COD-027095 SARGENTbLUNDY Square D Pressure & Temp. Switches nn. 00 Date C " 'C ^

X Safety-Reisted Non-Safety-Related Page C21 et ci,,, Public Service Co. of Colorado Wed by Date Project Fort St. Vrain Mensued by Deve Prei. No. 7390-00 j,,,,. g o.

See Tab D Apprend by Date PURPOS E:

The purpose of this appendix is to calculate the equivalent durations at the normal operating conditions for different materials for the entire 30 day DBE/ post-DBE.

CALCULATION AND RESULTS g

The thermal calculations are based upon the Arrhenius methodology 5-

namely, 4

9 1

1 I

TO T DBE tEO = tDBE8 U

where T

= Reference temperature in K

EQ O

T

= DBE temperature in K

DBE EQ

= Equivalent duration

~,

t t

= DBE duration DBE 9

= Limiting activation energy (eV)

K

= Boltzmann's Constant (8.617x10-5 eV/ K) 0 9

b 8

e 8

12

eXOT OPS $tM5 ABSOLUTES. AGE 095249101 ENTER PRO.' a NUMBER j

g.. /

i j. -

5

>739000 PROJ. NO.

739000 RUN ID dAKB Pega C22 PR06. NO. : 09.5.249-1.0!

DATE

01/13

.../86 EliTER K,F, OR C FOR TEMPERATURE UNITS

>F ENTER S,N,H,9, OR Y FOR DURATION UNITS

>M IS IT A RANPT (T/N) 1.

Calculation for phenolic for the entire 30-day plant DBE.

ENTER SPLIT-UP FACTOR (DEFAULT IS 1000) 2.

The equivalent number of years at 105'F N

AGING TEMPERATURE

>105 for the entire 30-day plant DBE is ENTER ACTIVATION ENERGT VALUE 10,64 O.16 yrs.

ENTER BEGINNING TEMP., ENBING TEMP., DUPATION ENTER END UHEN CONPLETE

>100,200,0.03

>200,300,0.07

>300,330,0.05

>330,300,0.05

>340,360,.0e<01>0e<0)"X

>360,360,0.10

>300,160,0.70

>140,170,0.50

>170,170,1.40

>170,185,4.60

>185,195,9.50

>195,170,53.00

>170,150,50.00

>l50,120,380.0

)l20,120,42700

>END EQUIVALENT DURATION AT 105.00F IS 82023.67 NINUTES s

ENTER N FOR NENU PRINT-0UT OR ENTER ACTIVITT NUNDER

>M ENTER ACTIVITY NUMBER

1) BEFINE PROFILE TYPE

4) BEFINEACTIVATIONANE8Y

)

)

s..,*'

Page C23 eXOT OPS $*095 ABSOLUTES. AGE 09524910I ENTER PROJECT NUMBER

>739000 PROJ. NO. : 739000 RUN ID : DAMB PR06. NO. : 09.5.249-1.0I DATE

01/14

.../86 ENTER K,F, OR C FOR TEMPERATURE UNITS

>F ENTER S,N,H,D, OR Y FOR DURATION UNITS 1.

Calculation for silicone rubber for IT A RAMPT (T/N) e en n

e y ars at l W TER SPLIT-UP FACTOR (DEFAULT IS 1000) y9999 for the entire 30-day plant DBE is 0.20 yrs.

ENTER AGING TEMPERATURE

>105 ENTER ACTIVATION ENER6Y VALUE i

30.86 i

ENTER BEGINNING TEMP., ENDING TEMP., DURATION ENTER END WHEN COMPLETE

>100,200,0.03 j

1200,300,0.07 i

1300,330,0.05

>360,360,0.10

]

>330,300,0.05 j

>300,160,0.70 i

>160,170,0.50 l

>170,170,1.40 l

>170,185,4.60

>185,195,9.50

>195,170,53.00

.170,150,50.00

>150,120,380.00

>120,120,42700 3

>END'^X

]

>END l

EQUIVALENT DURATIUM AT 105.00F IS 106628.2 NINUTES l

l' ENTER N FOR MENU PRINT-00T OR s

I

1. 193,192,13.0

>END 3

)

g.. /

}

EDUIVALENT DURATION AT 105.00F IS 933.7639 MINUTES Page C24 ENTER N FOR NENU PRINT-0UT OR ENTER ACTIVITY NUMBER

>9 CURRENT AGING TEMPERATURE = 105.00F d

CURRENT ACTIVATION ENERGY =

.64 CURRENT SPLIT-UP FACTOR =

9999 I

TIME UNIT IS MINUTES ENTER N FOR MENU PRINT-00T OR ENTER ACTIVITY NUMBER Id

>e95 KIP 30 l

.>3flN

• TERNINAL INACTIVE

• i

>99 TERN I

i 1

I l

l i

i i

i t

i