ML20215C841

Forwards NEDC-31322, BWR Owners Group Rept on Operational Design Basis of Selected Safety-Related Motor-Operated Valves, in Response to IE Bulletin 85-003.Response to Items a-d of Bulletin Also Encl

ML20215C841
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	10/08/1986
From:	Leonard J LONG ISLAND LIGHTING CO.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20215C844	List: ML20215C841 SNRC-1283, BWR Owners Group Rept on Operational Design Basis of Selected Safety-Related Motor-Operated Valves
References
IEB-85-003, SNRC-1283, NUDOCS 8610100477
Download: ML20215C841 (11)

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[ fig ____m LONG ISLAND LIGHTING COM PANY SHOREHAM NUCLEAR POWER STATION P.O. BOX 618, NORTH COUNTRY ROAD e WADING RIVER, N.Y.11792 JOHN D. LEONARD,JR.

VICE PRESIDE NT . NUCLE AR OPE RATIONS OCT 0 81986 SNRC-1283 Dr. Thomas E. Murley Regional Administrator U.S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 I.E. Bulletin 83-03 Motor Operated Valve Common Modo Failures During Plant Transients Due to Improper Switch Settings Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322

Dear Dr. Murley:

The Boiling Water Reactor Owner's Group (BWROG) has completed its task of developing a generic position for meeting the require-ments of the subject Bulletin. Attachment 1 is a copy of the BWROG Report NEDC-31322 entitled "BWR Owner's Group Report on the Operational Design Pasis of Selected Safety-Related Motor-Operated Valves". This report contains a methodology for calculating specific valve maximum expected differential pressures in response to action item (a) of the subject bulletin. Also presented in the Report is a methodology and basis for identifying the scope of systems and valves to which the subject Bulletin pertains, along with generic justifications for exempting certain valves from readiness testing. LILCO has ut!.lized the BWROG methodology to calculate maximum expected differential pressures for each valve identified in the scope. In some cases as identified in Table 1 of Attachment 2 the BWROG methodology was found to result in higher maximum expected differential pressures than was utilized in the Shoreham design bases. These cases are subject to continuing engineering review by LILCO, and we expect an operability determination to be completed within 60 days.

Attachment 2 contains the specific information required to be submitted at this time by action items a through d of the subject Bulletin. '7 h ll 8610100477 861008 '

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SNRC-1283 Page 2 -

It is our intent to use a dynamic tasting program to comply with the requirement of item (c) of-the subject bulletin. We plan on completing our test program by the.end of tha third quarter of 1987 and submitting a written report as-required by item (f) of the bulletin within 60 days of completing our test _ program. ,

Should you or your staff require additional information, please '

contact my office.

Very truly yours, s kp D Jb n\-. 4e nard, o &W43 Jr. ' '

Vich President - Nuc e r Operations-ijs cc: R. Lo J.A. Berry

r-AFFIDAVIT STATE OF NEW YORK )

ss:

COUNTY OF SUFFOLK )

I, JOHN D. LEONARD, JR., being duly sworn, depose and say that I am the Vice President - Nuclear Operations for the Long Island Lighting Company. I am authorized on the part of said Company to sign and file with the U.S. Nuclear Regulatory Commission the enclosed letter (SNRC-1283) for the Shoreham Nuclear Power Station. This response was prepared under my supervision and direction; and the statements contained therein j are true and correct to the best of my knowledge, information and belief.

b(& W.7h _

Jchn D. Leonard, Jr.'

Swotn to before me this

_[tday of Q M e 1986 /~" UNDA A. CRATTY NOTARY PUBUC, State of New York No.4816267 Quahfd m Suttolk County Commissson Expres March 30,198 a Oc .

ATTACHMENT # 2

a. Review and document the design basis for the operation of each valve. This documentation should include the maximum differential pressure expected during both opening and closing the valve for both normal and abnormal events to the extent that these valve operations and events are included in the existing, approved design basis, (i.e., the design basis documented in pertinent licensee submittals such as FSAR analyses and fully-approved operating and emergency procedures, etc.). When determining the maximum differential pressure, those single equipment failures and inadvertent equipment operations (such as inadvertent valve closures or openings) that are within the plant design basis should be assumed.

Response

Attachment 1 provides the BWROG design basis for the operation of each valve and contains the documented methodology used to calculate the maximum expected differential pressures that will be used when complying with the testing requirements of item (c) of the subject bulletin.

Table 1(enclosed) lists the valves installed at Shoreham which are within the scope of the subject bulletin and contains the maximum differential pressure expected during abnormal events as computed using the generic BWROG methodology. These valves, which are installed in the High Pressure Coolant Injection and Reactor Core Isolation Cooling systems do not perform an active safety function during normal operating conditions, therefore in accordance with section 3.2 of Attachment 1 no maximum differential pressure was calculated for normal events.

I. E. Bulletin 85-03 -

Table 1 ,

BWROG Limitorque Design ABNORMAL EVENTS Valve Differential MAXIMUM DIFFERENTIAL PRESSURE VALVE ID Operator Valve Functions Pressure OPENING (3) CLOSING NOTES LE41*MOV035 SMB-3-100 HPCI PP DISCH 1140 1150 1170 2 14"-900# Gate IE41*MOV036 SMB-00-10 Min Flow Bypass 1200 1400 1385 2 4"-900# Globe To Supp Pool 1E41*MOV031 SMB-0-25 HPCI Pump Suct 35 28 16"-150# Gate Cond TK 1E41*MOV032 SMB-0-25 HPCI Pump Suct 35 98 36 2 16"-150# Gate Supp Pool 1E41*MOV037 SMB-1-25 HPCI Pump Disch 1475 1385 8"-900# Globe Cond TK 1E41*MOV038 SMB-1-40 HPCI Disch 1475 1385 10"-900f Gate Cond TK 1E41*MOV034 SMB-2-60 HPCI Pump Disch 1140 1150 2 14"-900# Gate 1E41*MOV039 SMB-000-5 HPCI Lube Oil 850 46 55 2"-1500# Globe Cooler 1E41*MOV043 SMB-1-60 HPCI Steam 1135 1130 10"-900# Cate To Turb l

1E41*MOV041 SME-3-80 HPCI Steam 1135 1130 1130 1 10"-900 Cate To Turb 1 of 4 i

I. E. Bulletin 85-03 Table 1 .

BWROG Limitorque_ Design ABNORMAL EVENTS Valve Differential MAXIMUM DIFFERENTIAL PRESSURE Operator Valve Functions Pressure OPENING (3) CLOSING NOTES VALVE ID

. 1E41*MOV042 SMB-1-60 HPCI Steam 1135 1130 1130 1 10"-900f Gate To Turb 1130 2 IE41*MOV047 SMB-000-2 1E41*MOV041 1050 ----

1"-1500f Globe Bypass SMB-000-2 1E41*MOV042 1140 1130 IE41*MOV048 1"-1500f Globe Bypass  ;

SMB-0-15 Turb Exh to 52 35 IE41*MOV044 18"-150f Gate Supp Pool SMB-000-2 HPCI Turb Exh 52 61 2 1E41*MOV049 2"-600f Globe Vac Break SMB-00-25 RCIC Pump Disch 1300 1235 1160 1E51*MOV035 6"-900f Gate Min Flow Bypass 1280 1340 1340 2 IE51*MOV036 SMB-000-5 2"-1500f Globe To Supp Pool SMB-00-5 RCIC Pump Suct 130 28 IE51*MOV031 6"-150f Gate Cond TK RCIC Pump Suct 130 148 36 2 IE51*MOV032 SMB-00-5 6"-150f Gate Supp Pool RCIC Pump Disch 1215 --- 1260 2 IE51*MOV037 SMB-00-10 4"-900f Gate To Cond Tk 1E51*MOV034 SMB-00-10 RCIC Pump Disch 1300 1180 4"-900f Gate I l

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I. E. Bulletin 85-03 .

Table 1 ,

BWROG Limitorque Design ABNORMAL EVENTS-Valve Differential MAXIMUM DIFFERENTIAL PRESSURE VALVE ID Operator Valve Functions Pressure OPENING (3) CLOSING NOTES 1E51*MOV038 SMB-000-5 RCIC Lube Oil 1300 1340 .41 2 2"-1500f Globe Cooler IE51*MOV046 SMB-000-2 Vac Pump Disch 60 35 2"-600f Globe To Supp Fool 1E51*MOV043 SMB-00-7.5 RCIC Steam To 1135 1130 1130 3"-900f Gate Turb IE51*MOV041 SMB-00-10 RCIC Steam to 1135 1130 1130 1 3"-900 i Gate Turb 1E51*MOV042 SMB-00-7.5 RCIC Steam to 1135 1130 1130 1 3"-900# Gate Turb ,

IE51*MOV047 SMB-000-2 1E51*MOV041 1050 1130 2 1"-1500f Globe Bypass 1E51*MOV048 SMB-000-2 1E51*MOV042 1140 1130 1"-1500# Globe Bypass 3 of 4

1 I. E. Bulletin 85-03 -

Table 1 .

BWROG Limitorque Design ARNORMAL EVENTS Valve Differential MAXIMUM DIFFERENTIAL PRESSURE VALVE ID Operator Valve Functions Pressure OPENING (3) CLOSING NOTES 1E51*MC7045 SMB-000-5 RCIC Turb - 10; O 35 2 8"-150f Gate Exh IE51*MOV049 SMB-000-2 RCIC Turb Exh 60 ---- 61 2 1.5"-600f Globe Vac Break (1) Documentation was submitted via SNRC-1185 dated 6/28/85 to Mr. H.R. Denton to demonstrate valve would perform isolation function due to line break.

(2) Calculated maximum differential pressure using BWROG methodology results in a higher differential pressure than that utilized in the Shoreham design bases.

(3) The torque switch is nonfunctional in the opening direction as it is permanently shorted out of the circuit.

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b. Using the results from item a above, establish the correct switch settings. This shall include a program to review and revise, as necessary, the methods for selecting end setting all switches (i.e., torque, torque bypass, position limit, overlord) for each valve operation (opening and closing).

If the licensee determines that a valve is inoperable, the licensee shall also make an appropriate justification for continued operation in accordance with the applicable technical specification.

Resgonse LILCO will review the original engineering methodology that was utilized to establish existing torque switch settings at Shoreham. This methodology consists of the steps necessary to convert tosign basis differential pressures to torque values and finally to switch settings. Since the factory test results provided in SNRC-1185 proved successful, LILCO has no reason to doubt tre validity of this methodology.

Next, we will compare each differential pressure calculated in item (a) above to the original design value on the valve data sheets. For those cases where the maximum expected differential pressure calculated in (a) above exceed the value on the valve data sheetr, a torque switch setting will be determined. This new value will then be compared to the maximum allowable switch setting to confirm the adequacy of the original design. If it is determined that any design is not acceptable, then the valve will be declared inoperable and the applicable limiting conditions for operation will be enforced, or we will make an appropriate justification for continued operation in accordance with the applicable technical specification. If it is determined that some design ranges are not acceptable, they will be changed, and switch setting will be adjusted as required.

It is important to note that, for valves listed in Table 1.

the torque switch is nonfunctional in the opening direction as it is permanently shorted out of the circuit. Therefore, torque bypass switch settings are not provided because they are not relevant at Shoreham.

The open limit switch setting will be confirmed or adjusted, during our test program. The limit switch will be adjusted if needed, in accordance with existing plant procedure EP46.009.01.

For valves with an active safety function during abnormal events, the thermal overload is bypassed in the direction of travel needed to perform its' safety function.

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c. Individual valve settings shall be changed, as appropriate, to those established in item b, above. Whether the valve setting is changed or not, the valve will be demonstrated to be operable by testing the valve at the maximum differential pressure determined in item a above with the exception that testing motor-operated valves under conditions simulating a break in the line containing the valve is not required.

Otherwise, justification should be provided for any cases where testing with the maximum differential pressure cannot practicably be performed. This justification should include the alternative to maximum differential pressure testing which will be used to verify the correct settings.

Note: This bulletin is not intended to establish a requirement for valve testing for the condition simulating a break in the line containing the valve.

However, to the extent that such valve operation is relied upon in the design basis, a break in the line containing the valve should be considered in the analyses prescribed in items a and b above. The resulting switch settings for pipe break conditions should be verified, to the extent practical, by the same methods that would be used to verify other settings (if any) that are not tested at the maximum differential pressure.

Each valve shall be stroke tested, to the extent practical, to verify that the setting defined in item b above have been properly implemented even if testing with differential pressure can not be performed.

Response

We will establish a program to determine the acceptability of existing switch settings based on the results of item b, allowing for adjustments as required. It is our position that there is an acceptable range in which the torque or limit switch may be set as opposed to a single correct switch setting.

It is our intent to verify the adequacy of these switch settings by stoke testing the valves under dynamic conditions (based on item a results) to the extent practical, using an existing plant procedure.

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-id . ' Prepare or revise procedures to ensure that correct switch settings are. determined and maintained throughout the life of the-plant. Ensure that applicable industry recommendations are considered in the preparation of~these procedures.

Response

We will review our existing plant procedure SP46.009.01 to confirm that it contains adequate steps to ensure that the proper switch settings are established and maintained throughout the life of the plant. While performing this review applicable industry recommendations will be considered t and referenced as appropriate.

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