ML20137L667

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Proposed Tech Specs 4.8.4.2.2 Re motor-operated Valves Thermal Overload Protection Not Bypassed
ML20137L667
Person / Time
Site: Millstone Dominion icon.png
Issue date: 03/31/1997
From:
NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20137L659 List:
References
NUDOCS 9704070282
Download: ML20137L667 (10)
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EtttTRfCAL 90 Wit inimi s.

seTOR-OPERATED VALYtt TWtRMAL DYtttBAD PROTECTION NDT SYP11tfD ifMITfMC 26iGffl0N FOR OPERATION 3.8.4.2.2 fach thermal everload protection not bypassed under accident conditions for safety related motor operated valves shall be operable.

APPLICAlltfTY: Ifhenever the motor sperated valve is required to be OPERABLE.  ;

EIIM:

tfith the thernal overload protection for one or more of the above required valves inoperable, bypass the inoperable thenmal overload within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; restore the inoperable thersal overload to OPERABLE status within 30 days or declare the affected valve (s) inoperable and apply the appropriate ACTION Statement (s)fortheaffectedsystes(s).

SURVEfttaNCE Rt00fREMENTS __

h4.t.t.he thermal overload protection for the above reoutred valves 11 ='..; n '- shall

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_ne semenstrated OPERA 8tf at least once per 18 sonths@d f:

3: th: =t:r et:rt;jby the performance of a CMNNEL CAUBRATION of a repre-sentative sample er at least 25% of all thermal overloads for the above required valves.

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4.8.4.2.2.2 The thermal overioad protection ivr an above required valve shall be demonstrated OPERABLE following maintenance on its motor starter by the performance of a CHANNEL CAllBRATION.

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a 9704070282 970331 PDR ADOCK 05000423 p PDR 3/4822 Amendment No. M N.]L.L.5

. TONE - IB(IT 3

Docket No. 50423  !

B16352 i l

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i Attachment 3 Millstone Nuclear Power Station Unit No. 3 i Proposed Revision to Technical Specification Motor Operated Valves Thermal Overload Protection Surveillance (PTSCR 3-10-97)

Retvoed Pace L

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March 1997 .

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U.S. Nuclear Commission i B16352%ttactwnent 3\Page 1  ;

RETYPE OF PROPOSED CHANGE l Refer to the attached retype of the proposed change to the Technical Specifications.

The attached retype reflects the currently issued version of the Technical ,

Specifications. Pending Technical Specification changes or Technical Specification  :

changes issued subsequent to this submittal are not reflected in the enclosed retype.

The enclosed retype should be checked for continuity with Technical Specifications prior to issuance.

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ELECTRICAL POWER SYSTEMS MOTOR-0PERATED VALVES THERMAL OVERLOAD PROTECTION NOT BYPASSED LINITING COMITION FOR OPERATION 3.8.4.2.2 Each thermal overload protection not bypassed under accident conditions for safety-related motor-operated valves shall be operable.

APPLICABILITY: Whenever the motor-operated valve is required to be OPERABLE.

ACTION:

With the thermal overload protection for one or more of the above required valves inoperable, bypass the inoperable thermal overload within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; restore the inoperable thermal overload to OPERABLE status within 30 days or declare the affected valve (s) inoperable and apply the appropriate ACTION Statement (s) for the affected system (s).

SURVEILLANCE REQUIRENENTS 4.8.4.2.2.1 The thermal overload protection for the above required valves shall be demonstrated OPERABLE at least once per 18 months by the performance of a CHANNEL CALIBRATION of a representative sample of at least 25% of all thermal overloads for the above required valves.

4.8.4.2.2.2 The thermal overload protection for an above required valve shall be demonstrated OPERABLE following maintenance on its motor starter by the performance of a CHANNEL CALIBRATION.

M,IglSTONE-UNIT 3 3/4 8-22 Amendment No. JJ, %f

. i Docket No. 50-423 I B16352  ;

I Attachment 4 Millstone Nuclear Power Station Unit No. 3 Proposed Revision to Technical Specification Motor Operated Valves Thermal Overload Protection Surveillance -

(PTSCR 3-10-97)

Backaround and Safety Assessment

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March 1997

U.S. Nuclear Commission B16352\ Attachment 4\Page 1 Badotound Technical Specification Surveillance 4.8.4.2.2 requires testing of thermal overload protection on a periodic bases and following maintenance on the motor starter. The proposed dunnge to the surveillance is to separate these two testing requirements into two new surveillances, 4.8.4.2.2.1 and 4.8.4.2.2.2.

Safety Assessment Technical Specification Surveillancs 4.8.4.2.2 requires that the thermal overload protection for safety related motor operated valves be demonstrated OPERABLE by performing a CHANNEL CALIBRATION st least once per 18 months on a representative sample of at least 25% of all thermal overloads and after maintenance on the motor starter. The wording of the surveillance is confusing and this proposed change will correct this by separating the two types of surveillance testing.

The clarification of Technical Specification 4.8.4.2.2 to separate the 25% sampling testing of thermal overloads from the testing of thermal overloads following maintenance on its motor starter is safe and does not constitute an Unreviewed Safety Question. It is an administrative change only.

This proposed change to Technical Specifications is considered safe because it will not result in the plant being operated in an unsafe condition, decrease available safety margins, nor adversely impact the consequences of an accident. It will cause no increase in the risk to the public health or safety, it does not increase either the probability of event occurrence, the probability of human errors mitigating the event, the probability of the failure of mitigating equipment, nor does it introduce any new accidents or equipment malfunctions.

This proposed change does not change any of the requirements of this surveillance and is an administrative change as:

. The proposed changes to the surveillance testing of the motor-operated valve thermal overload protection are consistent with equipment design criteria and performing the surveillance testing provides the necessary assurance that the motor operated valve thermal overload protection will function as required.

  • The proposed changes to the surveillance testing of the motor-operated valve thermal overload protection does not change the operation of any system or system component during normal or accident evaluations.

U.S. Nuclear Commission .

B16352%ttachment 4Page 2 l

  • The proposed changes to the surveillance testing of the motor-operated valve i thermal overload ph are administrative in that the changes to the l surveillance only clanfy that folic;/c.g maintenance on the motor starter, a channel calibration is required only on that valve. The surveillance continues to require periode representative sample testing.

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l Docket No. 50-423 B16352 1

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s Attachment 5 Millstone Nuclear Power Station Unit No. 3 Proposed Revision to Technical Specification i Motor Operated Valves Thermal Overload Protection Surveillance  ;

(PTSCR 3-10-97)

Sionificant Harards Consideration and Environmental Considerations 1

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March 1997 i

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. U.S. Nuclear Commission B16352%ttachment 5\Page 1 Sionificant Hazards Consideration NNECO has reviewed the proposed change in accordance with 10CFR50.92 and has concluded that the change does not involm a significant hazards consideration (SHC).

The bases for this conclusion is that the three criteria of 10CFR50.92(c) are not .

satisfied. The proposed change does not involve a SHC because the change would j not:

1. Involve a significant increase in the probability or consequence of an I accident previously evaluated.

i The proposed changes to the surveillance testing of the motor-operated valve  ;

thermal overload protection are consistent with equipment design criteria and performing surveillance testing does not significantly increase the probability of I an accident previously evaluated. The proposed changes to the surveillance i testing provides the necessary assurance that the motor operated valve thermal overload protection will function as required and does not involve a significant 1 increase in the consequence of an accident previously evaluated .

Therefore, the proposed changes do not involve a significant increase in the probability or consequence of an accident previously evaluated.

2. Create the possibility of a new or different kind of accident from any accident previously evaluated.

The proposed changes to the surveillance testing of the motor-operated valve thermal overload protection does not change the operation of any system or system component during normal or accident evaluations.

Therefore, the proposed change does not create the possibility of a new or different kind of accident from any accident previously evaluated.

3 involve a significant reduction in a margin of safety.

The proposed changes to the surveillance testing of the motor-operated valve thermal overload protection are administrative in that the changes to the surveillance only clarify that following maintenance on the motor starter, a channel calibration is required only on that valve. The surveillance continues to require periodic representative sample testing.

Therefore, the proposed change does not involve a significant reduction in a margin of safety.

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-' U.S. Nuclear Commission B16352Wttachment 5\Page 2 ln conclusion, based on the information provided, it is determined that the proposed

change does not involve an SHC. 1 4

l Environmental Considerations 1

NNECO has c, viewed the proposed license amendment against the criteria of 10CFR51.22 for wwironmental considerations. The proposed change does not involve a SHC, does not Ugnificantly increase the type and amounts of effluents that may be

rolessed offsite, ne significantly incrosse individual or cumulative occupational radiation exposurer. Isased on the foregoing, NNECO concludes that the proposed  ;

change meets the criteria delineated in 10CFR51.22(c)(9) for categorical exclusion from the requirements M an environmental considerations.

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