ML20140D048

Suppl to Evaluation of EQ Impact of Wepc TS Change Request 192

ML20140D048
Person / Time
Site:	Point Beach
Issue date:	04/15/1997
From:	Gleason J, Hinck J, Krause C GLS
To:
Shared Package
ML20140D043	List: ML20140D048 NPL-97-0177, Forwards Rept 97318-2, Suppl to Evaluation of EQ Impact of Wepc TS Change Request 192, Which Is Needed to Address Four Items
References
97318-2, NUDOCS 9704220130
Download: ML20140D048 (18)

Text

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WE PBNP TsCR 192 EQ EVALUATION REPORT NUMBER 97318-2 l i, .

l GLS Enterprises, Inc.

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i l Suppleviietit to Evaluation of EQ .

4 l Impact of Wisconsin Electric Power ,

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3 CompanyTechnical hacificaGon ,

l l Change Request 192 e

! l l GLS Enteiyiises, Inc.

I 1819 Cross Creek Road

} Huntsville, AL 35802-3972  ;

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{ Ph 205-881-9868 '

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/ Y, i Email: gisinc@ traveller.com n^<

' James F. Gleason, P.E.

,/ Date : 4-12-97 w a John A. Hinck, Wisconsin Electric Date : 4-14-97 j/ gg Ch s Krause Wsconsin Electric Date : 4-14-97 GLS ENTERPRISES, INC. 97318-2 1

9704220130 970416 DR ADOCK0500g6 APR 151997

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WE PBNP VSCR 192 EQ EVALUATION REPORT NUMBER 97318-2 i

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GL,8 Enterprises, Inc. 97318-2 2

WE PBNP TsCR 192 EQ EVALUATION REPORT NUMBER 97318-2 Wisconsin Electric Power Company has identified changes to the Design Basis Accident conditions that are postulated based on information provided in support of Technical Specification Change Request (TSCR) 192. The changes in the DBA conditions required revisions to the DBA temperature and pressure profiles utilized in the Point Beach Nuclear Plant (PBNP), Units 1 and 2 Environmental Qualification (EO) Program, which is required to meet 10CFR50.49. It was determined that these changes could impact EQ equipment and an evaluation was performed. A Condition Report, CR 97-0242, was initiated. The condition report documents the operability determination and establishes actions for final resolution. .A more detailed evaluation, Evaluation of EQ Impact of Wisconsin Electric I Power Company Technical Specification Chanae Reauest 192. dated February 24,1997, l was prepared to document environmental qualification status of affected equipment. It j was discussed with the Nuclear Regulatory Commission on February 24, 1997.  ;

Comments at this meeting were documented in meeting minutes from the NRC dated l March 3,1997. Evaluation of EO Impact of Wisconsin Electric Power Company Technical Speci5 cation Chanae Reauest 192. dated February 24,1997, is being revised based on j the comments from the NRC. The revision has been assigned report #97318-1.

Supplemental Report #97318-2 (this report) was prepared to discuss equipment for which the NRC requested additional information. The components, for which additional information was requested, are:

1. Transamerica Delaval Gems Level Transmitter (Item 15 ) )

2. Rome Cable (Item 28)  !

3. Containment Accident Fan Motor Bearing Lubricant (Item 37) l

4. Containment Accident Fan Lubricant (Item 38).  !

Note: Item numbers for equipment in this report have been carried through from the original evaluation to maintain consistency when referring to equipment. Because of the similarity in the equipment trtles for item 37 and 38, the word motor is in a bold font and the word fan is in an italicized font to help make a distinction between the items.

1 The conclusions of this supplement are that :

1. The EO testing of the Transamerica Delaval Gems Level Transmitter (Item 15) envelopes the new postulated PBNP DBA, except for a 5.8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period. This is judged to be acceptable because aging test data in the EQ test program envelopes the points not met in the new postulated PBNP DBA.

2. The Rome Cable (Item 28) is not required to be qualified to TSCR 192 because it performs no safety related function and has no failure mode affecting safety for this DBA.  ;

3. The EQ testing of the Containment Accident Fan Motor Bearing Lubricant (Item 37) envelopes the new postulated PBNP DBA, except for a 5.25 and a 8.5 hour5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> period. This GLS ENTERPRISES, INC. 97318-2 3

WE PBNP TSCR 192 EQ EVALUATION REPORT NUMBER 97318-2

. is judged to be acceptable because another EQ test report envelopes the points not met in the new postulated PBNP DBA.

4. The Containment Accident Fan has two Lubricants. The EQ testing of the Containment Accident Fan Lubricants (ltem 38) envelopes the new postulated PBNP DBA, except for a 5.25 and a 8.5 hour5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> period. This is judged to be acceptable because another EQ test report envelopes the points not met in the new postulated PBNP DBA for one lubricant and the other lubricant has a continuous use temperature rating enveloping the points not met in the new postulated PBNP DBA.

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1. Transamerica Delaval Gems Level Transmitter (item 15)

Transamerica Delaval Gems Level Transmitter (item 15) EQ Test Data is below the new postulated PBNP DBA temperature profile beginning at the 2.1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> point (242*F) and ending at the 7.9 hour1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> point (225'F). Figure 1 shows the new postulated PBNP DBA temperature profile and the EQ test data for the transmitter. Figure 2 expands the view of the area that was not enveloped by the original EQ test. The thermal aging temperature used during qualification testing of the transmitter is also included on these plots.

The Transamerica Delaval Gems Level Transmitter has been tested to DBA conditions significantly harsher than those anticipated at PBNP except for a 5.8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period described above. Prior to LOCA testing the transmitters were thermally aged at 248 F for 2,161.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. The demonstrated ability of the transmitter to survive extended periods at 248'F during thermal aging provides assurance that the transmitter will not fail during the 5.8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> post-LOCA period when maximum temperatures of 242*F (17'F above the EQ test data for the transmitter) may occur.

2. Rome Cable (item 28)

In the evaluation of the impact on environmsntal qualifications of equipraent subject to the revised accident conditions resulting from the FSAR Section 14.3.4 Containment Integrity Analysis submitted with Technical Speerfication Change Request (TSCR) 192, PBNP initially identified that the qualifications of all EQ equipment located in containment at PBNP Unit 1 and Unit 2 should be evaluated to the revised post accident temperature and pressure profiles. It has subsequently been determined that the Rome PVC insulated and PVC jacketed cable in containment is used in only one application and that application is not required subsequent to the LOCA accident evaluated in the containment integrity analysis.

Rome cable is present!y used to provide control signals (operator power is provided via a different cable type) to the Limitorque operators on the motor operated valves which provide a blocking function for the pressurizer power operated relief valves (PORVs).

These blocking valves are provided to mitigate the coolant loss resulting from a stuck open PORV or the failure of a PORV to fully close. Operation of the block valves is not required following the design basis LOCA condrtions evWuated in the containment integrity analysis.

GLS Enterprises, Inc. 97318-2 4

WE P8NP TsCR 192 EQ EVALUATION F.EPORY NUMBER 97318-3 Thus, the Rome cable provides no safety related function during this design basis event LOCA and its failure in any manner will not prevent any other safety related equiprnent from functioning nor will it fail in any manner which could provide misleading information to the plant operators. Accordingly, evaluation of the Rome cable to the design basis event LOCA conditions is not required based on the cnteria specifed in NUREG-0588, " Interim Staff Position on Environmental Qualification of Safety-Related Electrical Equipment,"

Revision 1. (Note Point Beach has evaluated the cable for conditions anticipated if a PORVis stuck open.)

3. ramtainment AeeW Fan Motor Bearing Lutricant (Item 37) 3.1 Tests of Lubricant for Containment Accident Fan Motor Bearings WCAP 7722 is a final report on several test programs conducted by Westinghouse, one of which is testing of the containment accident fan motor bearings and associated Jubricants in a long term post accident test. As summarized in Table 1, the lubricant qualifed in the motor bearing test reported in WCAP 7722 was Chevron BRB #2, a mineral oil with Polyurea thickener, Westinghouse designation 773A773.

WCAP 7829 reports on testing of the containment #ccident fan motor with motor bearings and Chevron BRB #2 lubricant.

3.2 New Postulabd PBNP DBA Temperature Profile Comparison to EQ Tests The Point Beach EQ program identified that for Containment Accident Fan Motor Bearing Lubricant (Item 37), the EQ Test Data from WCAP 7722 is below the new postulated PBNP DBA temperature profile at the 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> point (242*F) until the 9.25 hour2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> point (220*F) and at the 20 hour2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> point (188'F) through the 28.5 hour5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> point (170*F).

WCAP 7829 EQ test data envelopes the new postulated PBNP DBA temperature profile.

3.3 Analysis of Points Below New Postulated PBNP DBA Review of the above EQ test data from the PBNP EQ files shows that the Containment Accident Fan Motor Bearing Lubricant is qualified to the new PBNP DBA requirements.

Figure 3 shows the new postulated PBNP DBA profile, the EQ test data for Containment Accident Fan Motor Bearing Lubricant from WCAP 7722, and the EQ test data for

! containment accident fan motor testing from WCAP 7829. Figure 4 expands the view of the area at the four hour point that was not enveloped by the motor bearing test reported in WCAP 7722. Figure 5 expands the view of the area at the twenty hour point that was l not enveloped by the motor bearing test reported in WCAP 7722.

During WCAP 7829 the Chevron BRB #2 Lubricant was tested at temperatures above i 270 F for over 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />. This envelopes the DBA requirement areas of 5.25 hours2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> from -

! 241 to 220 F and 8.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> from 188 to 170 F. This testing proves that the Containment l Accident Fan Motor bearing lubricant will not fail during the time when the EQ test data from WCAP 7722 does not envelope the new postulated DBA temperature profile.

3.4 New Westinghouse Lubricant CLS ENTEMR1SES, INC.

5 97318-2

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WE PBNP TscR 102 EQ EVALUATION REPORT NUMBER 97318-2

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Since the original qualification by Westinghouse in 1971 and 1972, Westinghouse has substituted Chevron SRI lubricant for Chevron BRB # 2. Westinghouse has performed an evaluation of Chevron SRI lubricant and Chevron BRB # 2. In addition to Westinghouse's evaluation of this substitution, additionalinformation conceming the substitution located in the PBNP EQ Files was reviewed.

t The substitution of Chevron SRI for Chevron BRB #2 included an evaluation of the composition and performance of the lubricants. Chevron SRI and BRB #2 lubricants are both highly refined mineral oil based lubricants with Polyurea thickener. Chevron SRI has a bearing life at 300 F and 10,000 rpm on the order of 6,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> as compared to the original BRB # 2 lubricant which had a bearing life at 300*F and 10,000 rpm on the order of 3,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />. Therefore, it is concluded that the substitution of Chevron SRI lubricant does notimpact the qualification.  ;

i See Table 1 for a summary of lubricant testing, uses, and properties. l I

4. Containment AceWagt far Lubricants (ttom 38) 4.1 Lubricants used in Containment Accident Fan Bearings The Containment Accident Fan bearing assemblies use two lubricants. Chevron BRB#2 (the same grease qualified for use in the motor bearings in section 3 above) was used to lubricate the roller bearings in the pillow block assemblies which support the containment accident fan shaft. Chevron BRB #2 has been replaced by Chevron SRI. Westinghouse Material M53701TT (E.1. DuPont deNemours & Co. Inc.'s Krytox 240 AC Fluorinated Lubricating Grease) is used in the pillow block's labyrinth seal to help prevent chemical spray from reaching the roller bearing lubricant foUowing initiation of containment spray.

l 4.2 Tests of Lubricant for Containment Accident Fan Bearings WCAP 7722, the final report on several test programs conducted by Westinghouse which i reported testing of the containment accident fan motor bearings, also tested containment accident fan bearings in a very similar long term post accident test. As summarized in Table 1, the lubricants qualified in the fan bearing test reported in WCAP 7722 were Chevron BRB #2 and the labyrinth seal grease, Krytox 240 AC.

4.3 New Postulated PBNP DBA Temperature Profile Comparison to EQ Test The Point Beach EQ program identified that for Containment Accident Fan Lubricants (Item 38), the EQ Test Data from WCAP 7722 is below the new postulated PBNP DBA temperature profile at the 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> point (242*F) until the 9.25 hour2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> point (220*F) and at the 20 hour2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> point (188'F) through the 28.5 hour5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> point (170*F).

4.4 Analysis of Points Below New Postulated PBNP DBA Data is provided from the PBNP EQ files which shows that this is not a concem and that the Containment Accident Fan Bearing Lubricants are qualified to the new postulated PBNP DBA requirements.

Figures 6 shows the new postulated PBNP DBA temperature profile, the EQ test data (WCAP 7722) for Containment Accident Fan Lubricant (Item 38), and the EQ test data for GLS Enterprises, Inc. 97318-2 6

d WE P8NP TsCR 192 EQ EVALUATION REE m I NUMBER br318-2 containment accident fan motor testing from WCAP 7829. Figure 7 expands the view of the area at the four hour point that was not enveloped by the fan bearing test reported in WCAP 7722. Figure 8 expands the view of the area at the twenty hour point that was not enveloped by the fan bearing test reported in WCAP 7722.

During WCAP 7829 the Chevron BRB #2 Lubricant was tested at temperatures above 270 F for over 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />. This envelopes the DBA requirement areas of 5.25 hours2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> from 241 to 220*F and 8.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> from 188 to 170 F. This testing proves that the Containment Accident Fan bearing lubricant Chevron BRB #2, will not fail during the time when the EQ test data from WCAP 7722 for containment accident fan bearings does not envelope the new postulated DBA temperature profile.

During Containment Accident Fan Bearing testing (WCAP 7722), a seahng grease, Krytox 240 AC, was added to the normally un-lubricated labyrinth seals on the fan shaft pillow block bearing assemblies. Westinghouse added Krytox 240 AC during the quahfration testing as a sealing grease to resist boric acid spray intrusion into the pillow block labyrinth seals.

Information from DuPont contained in the PBNP EQ files states Krytox 240 !ubricant is a carbon, oxygen, fluorine compound, which is chemically inert to virtually all chemicals used in a variety of industries and has no adverse effect on metals when the temperature is below 550 *F. It is rated for long periods at continuous temperatures up to 550 F and intermittent temoeratures of 800 F. Therefore perbrmance of the Krytox Lubricant is assured, based on information in the PBNP EQ program, during periods when the EQ test data in WCAP 7722 does not envelope PBNP's new postulated temperature profile.

See Table 1 for a summary of lubricant testing, uses, and properties.

4.5 New Westinghouse Lubricant I Since the original qualification by Westinghouse in 1971 and 1972, Westinghouse has substituted Chevron SRI lubricant for Chevron BRB # 2, Westinghouse has performed an evaluation of Chevron SRI lubricant and Chevron BRB # 2. In addition to Westinghouse's .

evaluation of this substitution, additional information conceming the substitution located in j the PBNP EQ Files was reviewed.

The substitution of Chevron SRI for Chevron BRB #2 included an evaluation of the I l

composition and perforrnance of the lubricants. Chevron SRI and BRB #2 lubricants are both highly refined mineral oil based lubricants with Polyurea thickener. Chevron SRI has a bearing life at 300 F and 10,000 rpm on the order of 6,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> as compared to the original BRB # 2 lubricant which had a bearing life at 300 F and 10,000 rpm on the order of 3,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />. Therefore, it is concluded that the substitution of Chevron SRI lubricant does notimpact the qualification.

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. Attachments  ;

Figure 1. Transamerica Delaval GEMS Level Transmitter DBA Comparison Figure 2. GEMS - Expanded DBA Comparison Vew Figure 3. Westinghouse Motor Lubricant DBA Comparison Figure 4. Motor Lubricant Expanded Scale at 4 Hours ,

Figure 5. Motor Lubricant Expanded Scale at 20 Hours Figure 6. Westinghouse Fan Lubricant DBA Comparison Figure 7. Fan Lubricant Expanded Scale at 4 Hours Figure 8. Fan Lubricant Expanded Scale at 20 Hours Table 1. Propertes and Applications of Westinghouse Fan Motor Bearing and Fan Bearing Lubricants l

l GLS Enterprises, Inc. 97318-2 s

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WE PBNP TSCR 192 EQ EVALUATION REPORT NUMBER 97318-2 Table 1. Properties and Applications of Westinghouse Fan Motor Bearing and Fan Bearing Lubricants l Mineral Oil with Polyurea Thickener l Chevron SRI Chevron BRB #2 ll Krytox 240AC Fluorinated Grease l Fan Bearing Currently used to lubricate the roller bearings Tested (WCAP 7722 - Fan Bearing Tests) and i Tested (WCAP 7722 - Fan Bearing Tests) .

in the pillow block bearing assemblies on the originally used to lubricate the rollen bearings and currently used as a sealing grease in the fan shaft. in the pillow block beanng assemblies on the labyrinth seals on the fan shaft pillow block fan shatt. bearmg assemblies.

WCAP 7722 Two tests ofinterest were: Tested in fan bearing (Pillow block bearing

1. Tested ofmotor bearings assemblies) labyrinth seals.

2. Test of fan bearings (Pillow block bearing and lubricants were tested twice, once with and once without a heat exchanger attached to the motor.

Material NLGI Grade - No.2 NLGI Grade - No.2 Characteristics Thickener - Polyurea, an ashless organic Thickener - Polyurea, an ashless organic Krytox grease has no drop point but the compound compound thickener begins to melt at 325'C (617 F). It Thickener, percent - 10 Thickener, percent - 9 is rated for long periods at continuous Oil- A highly refined mineral oil (600 SUS Oil- A highly refined mineral oil (600 SUS temperatures up to 550*F and intermittent at 100'F, Viscosity index 88) at 100 F, Viscosity index 88) temperatures of 800*F.

Additives - EfTective oxidation and rust Additives - Effective oxidation and rust inhibitors at a level to provide superior rust inhibitors protection in severe applications Temperature range--20 F to 350 F Temperature range--20 F to 350 F Texture - Smooth, buttery Texture - Smooth, buttery Color - Blue-green Color - Blue-green Compatibility - Laboratory data show this Compatibility - Laboratory data show this grease is compatible with sodium and lithium grease is compatible with sodium and lithium greases greases Bearing life (FTM 331) Bearing life (FTM 331) 300 F and 10,000 rpm -5800 hours 300 F and 10,000 rpm -3000 hours 350 F and 10,000 rpm (heat treated bearing) 350 F and 10,000 rpm (heat treated bearing)-

- 500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> 500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> Dropping point (ASTM D 2265) 465 F Dropping point (ASTM D 2265) 480 F GLS Ersterprises, Inc. 97318-2

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WE PBNP TSCR 192 EQ EVALUATION - REPORT NUMBER 97318-2 ,

Mineral Oil with Polprea Thickener-Chevron SRI Chevron BRB #2 Krytox 240AC Fluorinated Grease Rust protection and water resistance Rust protection and water resistance (ASTM D 1743) (ASTM D 1743)

Rust test Pass Rust test - Pass Oil separation Oil separation 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at 77 F (ASTM D1742)- 1.5 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at 77'F (ASTM D1742)- 3 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> at 212 F (FTM 321)- 1 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> at 212 F (FTM 321)- 1.5 Work stability (FTM 313) Work stability (FTM 313)

Penetration after 100,000 strokes - 380 Penetration after 100,000 strokes - 430 Storage stability,6 months at 100 F Storage stability,6 months at 100 F Worked penetration (ASTM D 217)- 285 Worked penetration (ASTM D 217)- 280 i Penetration (ASTM D 217) Penetration (ASTM D 217)

Unworked - 240 Unworked - 250 Worked - 280 Worked - 280 Copper corrosion (FTM 5309)- Pass ' Copper corrosion (FTM 5309)- Pass Dirt count, particles /CC (FBf 3005) Dirt count, particles /CC (FTM 3005) 10 Microns + - 560 25 Microns + - 140 25 Microns + - 200 50 Microns + - 35 75 Microns + - 0 75 Microns + - 50 125 Microns +- 0 Rubber swell (FTM 3603)- 9 Rubber swell (FTM 3603)- 9

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Equivalency Similar to Chevron BRB 11 per Westinghouse

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evaluation and information in PBNP EQ files .

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GLS Enterprises, Inc. 97318-2

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