ML20205M698

Rev 0 to Nuclear Engineering Procedure NEP-092, Establish Differential Pressure Limits & Tests for Motor-Operated Valves

ML20205M698
Person / Time
Site:	Davis Besse
Issue date:	04/07/1986
From:	TOLEDO EDISON CO.
To:
Shared Package
ML20205M679	List: ML20205M676 ML20205M698 ML20205M703 ML20205M717
References
NEP-092, NEP-92, TAC-59702, NUDOCS 8604150348
Download: ML20205M698 (23)

Text

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. L PROCEDURE TITLE SHEET E3 7171 TITLE No. MU~N yetgoo NUCLEAR ENGINEERING aEvisio% v EDISON PROCEDURES MANUAL PAGE L oF*E SUBJECT EFFECTIVE oATE INITI ATEo 8Y Nuclear Engineering 04/07/86 Group

, Establish D/P Limits and Tests For Motor suPEaseces AF novEo sy icivie.on o rat <>

Operated Valves

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1.0 PURPOSE This procedure provides instructions for determining and documenting the characteristics of the installed Limitorque Motor-0perated Valves (MOVs), Exhibit I, to establish:

1. The limiting condition for design and operation under differential pressure (D/P) and flow. The data obtained will be used in performing the MOV Data Evaluation Procedure (NEP-091).

2. A representative sample of valves to be tested to confirm the adequacy of the corrective maintenance procedures listed in paragraph 4.5 used in the Motor Operated Valve Reliability Improvement Program.

3. Test conditions for the representative sample of test valves (Exhibit VI).

2.0 SCOPE This procedure applies to all Limitorque Motor Operated Valves types SMB and SMC, and shall be performed on MOVs listed in Exhibit I.

3.0 RESPONSIBILITY The Nuclear Engineering Group Director is responsible for the preparation, and use of this procedure by engineers who have received the following training:

1. Principles of operation of Limitorque Operators.

2. Interpretation of MOVATs Field Data.

These courses can be administered by certified contract personnel or similar courses developed by the Nuclear Training Division.

4.0 REFERENCES

4.1 Davis-Besse Technical Specifications 4.2 Toledo Edison Specifications 4.2.1 12501-M-210N, Non-Nuclear Gate, Globe and Check Valves 2 1/2" and Larger 8604150348 860410 PDR ADOCK 05000346 p PDR

PROCEDURE CONTINUATION SHEET B so retto sus;Ecr t.stablish D/P Limits EPPECTIVE D ATE PAGE NO, and Tests For MOVs 04/07/86 2 22 NEP-092 4.2.2 12501-M-212Q, Nuclear Gate, Globe, and Check Valves 2 1/2" and Larger 4.2.3 12501-M-213Q, Nuclear Gate, Globe, and Check Valves 2" and Smaller 4.2.4 12501-M-215Q, Nuclear Butterfly Valves 4.2.5 12501-M-314Q, Nuclear Control Valves 4.3 Toledo Edison Drawing, 7749-E-15, NOV Data List 4.4 Davis-Besse Updated Safety Analysis Report (USAR) 4.5 Davis-Besse Maintenance Procedures 4.5.1 MP-1410.32, Testing of Motor Operated Valves using MOVATS 4.5.2 MP-1411.04, Maintenance and Repair of Limitorque Valve Operators Types SMB-000 and SMB-00 4.5.3 MP-1411.05, Maintenance and Repair of Limitorque Valve Operators SMB-0 through SMB-4 4.5.4 MP-1411.06, Preventive Maintenance of Type SMB and SMC Limitorque Valve Operators 4.5.5 MP-1411.07, Maintenance and Repair of Limitorque Valve Operators Type SMC-04 4.6 Nuclear Engineerina Procedures Manual 4.6.1 NEP-050, Processing Surveillance Reports 4.6.2 NEP-080, Calculations 4.6.3 NEP-090, Design Verification 4.6.4 NEP-091, Motor-Operated Valve Data Evaluation Procedure 5.0 DEFINITIONS 5.1 CEECKER- Mechanical Design Engineer designated by the Mechanical Engineering Supervisor.

5.2 DESIGN FUNCTION - Close or open while a design condition of pressure or flow exists.

5.3 LIMITING DIFFERENTIAL PRESSURE OR FLOW (LCPF) - Differential pressure (D/P) or flow across valve disk which is the maximum under which the valve is to perform its design function.

5.4 MOV - Motor Operated Valve havlsg a limitorque operator.

5.5 POSITION SEATED VALVE - Valves which are positioned by limit switch, i.e. quarter turn valves and diaphragm valves.

PROCEDUZE CONTINUATION SHEET

' ' E O 7171 A su saect Estabitsh D/P Limits spractive cara pace No.

and Tests For MOVs '

04/07/86 3 22

,, NEP-092 5.6 RESPONSIBLE ENGINEER - The engineer trained in the principles of operation of Limitorque operators and field data interpretation according to NEP-091.

5.7 SYSTEM ENGINEER - The engineer responsible for a system with valves of interest.

5.8 TORQUE SEATED VALVE - Gate or globe valves requiring torque switch activation to provide tight shutoff. '

5.9 CONFIRMATORY TEST - Test of valve that will ensure maintenance procedures used on each MOV are adequate when: 1

1. Bypass switch setpoint is sufficient to allow  !

valve unseating prior to reinsertion of the torque '

switch into the control circuit.

l

2. Torque Switch settings ensure closing the valve '

sufficiently to meet its limiting differential Pressure or flow.

6.0 REQUIREMENTS l

6.1 Method of Valve Cateaorization Responsibility Action Responsible Engineer 6.1.1. Categorizes all safety-related MOVs on i the List of Nuclear Safety Related MOVs  ;

(Exhibit I) utilizing Exhibit VIII. '

The valves shall be assigned a I valve category number and be grouped including the following:

a. Vendor

b. Valve type

c. Valve size

d. Closing (or seating) control (torque or position) 6.1.2. List valves with identical systes purpose or function (per Exhibit VIII) and valve category (per Exhibit I) utilizing the same sheet of the D/P Limit Review Record I (Exhibit II) and transmit to the appropriate I Systes Engineer. '

i 1

I

PROCEDURE CONTINUATION SHEET ED 79 7t A suSJECT L5 LJD L LSQ U/ t' Limits EPPECTIVE D ATE PAGE No.

and Tests For MOVs 04/07/86 4 22 NEP-092 o,

6.2 Determination of Limiting Conditions of Differential Pressure or Flow Responsibility Action System Engineer 6.2.1 Determines and documents (Exhibit II) maximum and minimum conditions of D/P and flow to establish the maximum D/P limit under which the valve is to perform its design function. Considers, as appropriate, the following types of information:

a. Pump suction and discharge conditions

b. Safety relief valve set points

c. Valve normal, upset, emergency, and faulted conditions

d. USAR & Tech Spec conditions for System and Valve

e. Single equipment failure, inadvertent equipment operation

f. Whether the valve (gate or globe) is to open or close against a full flowing system? ,

Note: The greatest thrust on the valve stem will occur when seating or unseating the valve at full differential pressure.

g. The D/P limit is to be for any anticipated transient 6.2.2 Obtains comments from Station Operations Engineers Department Engineers and resolves comments as neces sa ry.

6.2.3 Prepares description of the process for reaching the limiting D/P.

6.2.4 Transmits the completed Exhibit II along with the resolution of any comments and the description of process for reaching the limiting D/P to the Responsible Engineer.

Responsible Engineer 6.2.5 Checks the System Engineer's completed D/P Limit Review Record (Exhibit II) for completeness.

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PROCEDURE CONTINUATION SHEET

. Eo"nA sussect Establish D/P Limits EFFECTIVE o ATE PAGE NO.

and Tests For MOVs 04/07/86 5 22

,, NEP-092 6.3 Select Valves for Performina Confirmatory Tests Responsibility Action Responsible Engineer 6.3.1 Completes Exhibits III & IV to the extent necessary to select valves to be evaluated for test achievability )

including the following: )

1 1

a. Manufacturer, type, size, and design rating should be obtained from NEP-091 )

1 Exhibit I. '

1

b. The " Required Torque in FT-LBS" using the D/P limit justified for each valve listed using NEP-080.

c. Use Limitorque stalled rotor torque value i (NEP-091 Exhibit II) for " Torque Available-FT-LBS" and calculate the ratio of torque available to torque required.

d. Establishes test categories for Exhibit IV by valve type and size, i.e., globe valves up to 8 inches in one test category.

e. Indicates on Exhibit IV torque seated valve type, size, valve category, and quantity utilizing the List of Nuclear Safety-Related MOVs (Exhibit I).

f. Records on Exhibit IV the range of torque ratios (available/ required) utilizing the Review of LCPF (Exhibit III).

g. Selects and records for each test category on Exhibit IV the valves to be evaluated for confirmatory testing considering the following:

1. Approximately 20% of the valves in each test category should be tested.

2. Valves with the lowest torque ratio (available/ required) should be tested.

1

POOCEDURE CONTINUATION SHEET

• Eo titta SYSJECT LSLdDLLSh U/P timLLS EFFECTIVE D ATE PAoE NO.

and Tests For MOVs 04/07/86 6 22 NEP-092 OF

3. Valves are estimated to be testable by' hydro or flow test.

h. Indicates on the form for Review of LCPF (Exhibit III) which valves are selected to be evaluated for confirmatory testing.

i. List selected valves with identical system purpose of functior. (per Exhibit VIII) and valve category (per Exhibit I) utili::ing the same sheet of the D/P T.est Conditions Review Record (Exhibit V) and transmit to the appropriate System Engineer.

System Engineer 6.3.2 Determines & documents (Exhibit V) conditions of systems for testing each valve to be evaluated for Confirmatory testing. Considers the following, as appropriate:

a. Conditions of test,

b. Justification for test conditions.

c. Reference to piping isometric drawing and valves used as injection points during testing with hydropump or other equipment as necessary to duplicate conditions at a later date.

d. Records whether system pump flow or hydropump will be used.

e. If valve is to be "open" tested determine the follo- ag:

1. If the valve should be closed prior to the test with the maximus D/P or with zero D/P.

2. If the valve should be closed cold and then heated prior to testing.

I I

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1

PROCEDURE CONTINUATION SHEET

. Eo retta SwSakCT EstabilSh D/ P Limits EFFECTIVE DATE PAGE NQ.

and Tests For MOVs 04/07/86 7 22 NEP-092 08

3. If the valve should be closed hot and then cooled prior to testing.

f. Test temperature & NDTT temperature for limiting piece of equipment in system during test,

g. Test Conditions should not lift safety valves.

h. No freeze seal, will be used to isolate for these tests.

i. Are there equivalent valves as alternatives for Station Planning selection, i.e. parallel trained valves with similar torque ratio?

j. Identifies and records whether flow test with valve closure and/or opening is achievable and conditions of test.

k. Identifies and records whether to perform test in cold shutdown, hot standby or operating plant configuration.

6.3.3 Obtains comments from Station Operations Department Engineers and resolves comments as necessary.

6.3.4 Prepares description of the process for reaching the test condition.

6.3.5 Transmits the completed Exhibit V along with the resolution of any comments and the description of process for reaching the test conditions to the Responsible Engineer.

Responsible Engineer 6.3.6 Checks the System Engineer's completed D/P Test Conditions Review Record (Exhibit V) for completeness.

6.3.7 Completes Exhibit III and checks all l

calculations and exhibits.

a. Exhibit V data is used to confirm test conditions.

b. Enters & corrects as necessary all calculations done.in Paragraph 6.3.1.

PROCEDURE CONTINUATION SHEET

• EO 717t A suesEcr Establish D/P Limits EPPECTIVE DATE PAGE No.

and Tests For MOVs 04/07/86 8 22

,, NEP-092 6.3.8 Completes Exhibit IV

a. Group valves into categories to

• which a sampling of at least 20% will be selected for testing.

4

b. Determine valves to be tested in each category.

c. Verify at least 20% of valves have been selected from each group.

6.3.9 Completes Exhibit VI

a. Select valves and alternates for testing from Exhibit III & IV.

I

b. List pressure range for D/P using i

Exhibit II, III & V as well as consideration of test sage accuracy.

c. Discuss the test method with System Engineer & Operations and select test method (s),

d. Enter remaining data.

4

e. Enter comments as necessary.

6.4. Supervisory Acceptance t

Responsibility Action i

Responsible Engineer, 6.4.1 Attach completed Exhibits I through i Checker, and Responsible VII to a calculation cover sheet, according l Engineering Supervisor to NEP-080.

l l 6.4.2 Verify the adequacy of the Package Approvals, according to NEP-080.

Responsible Engineer 6.4.3 Provides completed forms to the 1 ,

appropriate Department Secretary / Clerk  ;

to complete document recording and filing i in accordance with NEP-080. j 6.4.4 Provides Exhibits II & III to i Responsible Engineers for NOV Data Evaluation Procedure (NEP- 091).

6.4.5 When test conditions or limiting D/P l requirements exceed the vendor's i

rating for D/P, initiates corrective actions per NEP-050. i i

i 1

i I

PROCEDURE CONTINUATION SHEET E O 717 t a sveaser Establish D/P Limits erascrive oars Paos No-and Tests For MOVs 04/07/96 9 o, 22 NEP-092 6.4.6 Submits a copy of the Summary of Motor Operated Valves to Test (Exhibit VI) to the appropriate department supervisor:

a. Maintenance Engineering i

b. Mechanical Design Engineering

c. Nuclear Plant Systems

' d. Licensing j

e. Operations ,

f. Performance Engineering  ;

a

g. Ele._:rical Design Engineering i

h. Engineering Assurance  !

7.0 RECORDS 1

7.1 The following documents generated / completed under this procedure are quality records:

7.1.1 Categorized List of Limitorque MOVs 7.1.2 D/P Limit Review Record l 7.1.3 Calculation Sheet for Review of LCPF

, 7.1.4 Confirmatory Test Category Record 1

7.1.5 D/P Test Conditions Review Record l

7.1.6 Summary of Motor Operated Valves to Test 7.1.7 Flow Chart for Establishing D/P Limits and Tests for MOVs 7.1.8 List of Safety-Related Limitorque Valves to be Set Up with MOVs t 7.2 The records identified in this section shall be captured and transmitted to Nuclear Records Management by the transmitting organization identified on the Nuclear Records List. Nuclear Records Management shall process and control these records for retention according to their procedures. Prior to submittal, the sender shall ensure thr.t procedure requirements pertinent to each record have been fulfilled. Each document shall be legible (use black ink, typewriter, or photostatic copy if possible), completely l filled out (use N/A if not applicable), adequately identifiable '

to the ites or activity involved, and shall be stamped,  ;

initialed, signed or otherwise authenticated, and dated. '

8.0 EXHIBITS I -

Categorized List of Limitorque MOVs II -

D/P Limit Review Record III Calculation Sheet for Review of LCPF IV -

Confirmatory Test Category Record V -

D/P Test Conditions Review Record VI -

Summary of Motor Operated Valves to Test VII -

Flow Chart for Establishing D/P Limits and Tests for MOVs j

VIII - List of Safety-Related Limitorque Valves to be set up with MOVAT PD 3905P/092

PROCEDURE CONTINUATION SHEET s 0 7171 A sveJact Estabitsh D/F Limits sprscrava oars paos No.

and Tests For MOVs 04/07/86 10 ,, 22 NEP-092 Exhibit I Sheet 1 of 1 CATEGORIZED LIST OF LIMITORQUE MOVS (Includes all Limitorque Operated Nucles e Safety Related MOVs)

I CATEGORY VALVI NO. VEND 01 VALVI VALVI SIATING CONTROL TYPE $125 (70R0U5 08 P08.)

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PROCEDURE E O 7171 A CONTINUATION SHEET svencr Establish D/P Limits enactive oars PAGE No-and Tests For MOVs 04/07/86 11 o, 22 NEP-092 Exhibit II D/P LIMIT REVIEW RECORD VALVE NO.

PROVIDE URITTEN REVIEW TO JUSTIFY MAI. D/P LIMIT PRESSURE. SYSTEM ENGINEER (RSE/PSE) IS TO PROVIDE ANSWER FOR EACH BLANR ( AS APPROPRI A.

PUMP (OR PRESSURE SOURCE) SUCTION AND/OR DISCHARGE CONDITIONS (FOR VALVE LIMITING CONDITIONS)

NOTE:

PUMP, OTSC OR OTHER SOURCE BY NAME AND EQUIPMENT No.

5.

SAFETY RELIEF VALVE SET POINTS: SUCTION PSIC DISCHARGE PSIC C.

VALVE NORMAL & UPSET CONDITIONS:

1. PRESSURE UPSTRZAM MIN. PSIC MAK. PSIG

2. PRESSURE DOWNSTRZAM MIN. PSIG MAX. PSIC

3. FLOW MIN. GPM MAX. GPM

4. OTHER D.

USAR AND TECH SPEC REFERENCE (PAGE & PARAGRAPH ONLY)

SEE ATTACHMENTS FOR DATA.

E.

SINGLE EQUIPMENT FAILURES OR INADVERTANT EQUIPMENT OPERATION:

OPERATIONAL TRANSIENT UP/DOWN STREAM MAX D/P LIMIT PSIC NOTES FOR ABBREVIATIONS:

NAV - NOT AVAILABLE NAP - NOT APPLICABLE OTHER IF DEFINED PREPARED BY:

• DATE f

PROCEDURE EO ?!Mo CONTINUATION SHEET '

sus 4Ec7 tstactLsh U/P Limits EPPECTIVE DATE PAGE NO.

and Tests For MOVs 04/07/86 12 ,, 22 NEP-092 Exhibit II Sheet 2 of 2 D/P LIMIT REVIEW RECORD Rrmw l

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. [0 :l T0llAIT FINES D/F VALUE FSIC PitIVIOUS TED D/F VALUE PSIC

, PRA'tICUS TID ESTIMATED CONDITIONS:

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PROCEDURE CONTINUATION SHEET t o 71714 svenct t.stablish D/P Limits e * **ctive D ATE ' AGE No-and Tests For MOVs 04/07/86 13 ,, 22 NEP-092 Exhibit IIT CAI.CULATION SHEET h

CALCULATiCas SHttT Valve Category 5o:

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Wh*C' or Forn Flowforoperation Review of Valve Limiting Conditions for & Testing of Press ure ****8'" i oneinavoa cave oe caecuso ears Do test conditions or limiting D/P conditions exceed vendor rating? Yes if yes. identify valve No.(s).: No 1 Ve19el Valve Operator T No. Site Type Valve /Oper.

Manufacturer Manufacturer Sise Ave 114Lle E Design D/P Ratina M Torque Ft-Lbs. PSIC 'F Il 8

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Valve / Operator Lietting Condition Test Categorization T No. For Design Review & Test Catesorization E D/P Flow Direction Desire M PSIC CPM

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PROCEOURE CONTINUATION SHEET '

to sitio sussacy EstaD11sh D/t' Limits EFFECT:ve omit PAQs NQ.

and Tests For MOVs 04/07/86 14 22 NEP-092 or

- CONFIRMATORY TEST CATEGORY RECORD Exhibit IV FOR TORQUE SEATED VALVES Revision No._ Confirmatory Test Category Record Rev. Date For Torque Seated Valves PREPARED BY DATE CHECKED BY DATE TORQUE VALVE VALVE VALVE RANGE OF TEST CATEGORY SEATED SIZE, CAT. QUANTITY TORQUE RATIO VALVE IN. (EXH. #1) AVAILABLE/ NO.

TYPE QTY. 1 (NPS) REQUIRED TESTED GLOBE 1 8 1.5 8 2.5 6 l

......... 8.................. 2 ,,,,,,,,,,,,,,,_,,,,,,,,,,___,,,,,,,,,,,,,,,, I

SUMMARY

24 TOTAL -

1 GATE .75 2 i

1 12 1.s 3 WlA)

WL/ll V. J h L 5 2 1 3 *3 2.5 11 3 8 4 11 f................. 12 ,,,_,,,,,,,,,,,,_,,,,,,,,,,,___,,,,,,_,,,_,,,

{ 8 2 Sp,qggi, _ ,,:,_ ,,,,,,:,,,,,,,,g 2,Igig_ _,,,,,,,,:, _,,_,,,,,2,,,,,,,,,,,,,_ _ _ ,,

GATE 10 2 12 6 14 6 16 2 18 6 20 2 S129fARY - -

24 TOTAL -

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1 PROCEDURE CONTINUATION SHEET E O 717 t A susJecT Establish D/P Limits errecTive oAre race No.

and Tests For 110Vs 0/./07/86 15 ,, 22 NEP-092 Exhibit V D/P TEST CONDITIONS REVIEW RECORD D/F TEST CONDITIONS RD IEW RICORD Valve No.

A. Max Pressure to Frevent Lifting Safety Valves:

8. Suggested Equivalent Alternative Valves:

C.

If Flow Test. Test Conditione During Valve Opening:

PSIG - GFM - *F -

and During valve Closing:

PSIG - GPM - 'F -

D.

If Hydropump Test. Test Conditione During Valve Opening:

PSIG - GPM - 'T-E. Plant Configuration for Test:

Mode 5 - Cold Shutdown Mode 3 - Hot Standby Mode 1 - Operating I F. If open testing is recommended:

1.

Should valve be closed prior to test with Max D/F or at least D/P?

2. Should valve be closed prior to testing cold condition and then heated to system condition prior to opening? '

FRZFARID BY:

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PROCEDURE CONTINUATION SHEET - -

to it 7so sussect tstaD11sh U/f Limits EPPECTIVE DATE PAGE NO.

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and Tests For MOVs O'./07/86 17 o, 22 NEP-092 Exhibit VII <

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and Tests For MOVs 04/07/86 18 22 OF NEP-092 Exhibit VII Sheet 2 of 2

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i Question No. 2.

Confirm that the torque and limit switch adjustments for each nuclear safety related motor operated valve take into account the limiting

.; requirements of Item 1 above.

Response to Question No. 2.

The limiting requirements referred to in Question No. I are taken into account in the torque switch setting. Confirmation is assured by procedure. Nuclear Engineering Procedure-091 (NEP-091), attached, accomplishes this confirmation in two steps:

Step 1 - Paragraph.B.2.b compares the limiting conditions (Question 1) with the manufacturers D/P. If the limiting D/P

exceeds the manufacturers rated D/P, corrective action is required.

Step 2 - Paragraph B.6 requires evaluating the thrust requirement.

The "as left" torque switch setting will result in available thrust

.., equal to or greater than the thrust required for operation under the- l j '~ limiting D/P and flow condition.

The limit switch is set.to bypass the torque switch during unseating to allow the actuator to develop full thrust during unseating (see response to Question 5). ,

4 l

1 1

1

_ _ - _ _ - - _ _ _ _ _ _ _ _ _ _ _ - - _ _ _ _ _ _ - _ - _ _ _ _ _ _ _ _ _ _ - - _ _ _ _ - _ - _ _ _ . _ _ _ - - - _ _ _ _ _ _ _ - _ _ _ _ - _ - _ _ - - _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ - _ _ -