ML18095A657

Proposed Tech Specs Mods to TS 3/4.3.4 & Associated Bases for Turbine Overspeed Protection Surveillance Requirements

ML18095A657
Person / Time
Site:	Salem
Issue date:	12/21/1990
From:	Public Service Enterprise Group
To:
Shared Package
ML18095A656	List: ML18095A655 ML18095A657
References
NUDOCS 9101020125
Download: ML18095A657 (8)

Text

INSTRUMENTATION ~

3/4.3",4 TUUINE OVERSPEED PRQTECTION LIMITING CONDITION FOR OPERATION 3.3.4 At least one turbine overspeed protection system shall be OPERABLE.

APPLICABILITY: MODES 1, 2 and 3.

ACTION:

a. With one stop valve or one control valve per high pressure turbine steam lead inoperable and/or with one reheat stop valve or one reheat intercept valve per low pressure turbine steam lead inoperable, restore the inoperable valve(s) to the OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or close at least one valve in the affected steam lead; otherwise, isolate the turbine from the steam supply within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

b. With the above required turbine overspeed protection system otherwise inoperable, within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> either restore the system to OPERABLE status or isolate the turbine from the steam supply.

SURVEILLANCE REQUIREMENTS 4.3.4.1 The provisions of Specification 4.0.4 are not applicable.

4.3.4.2 The above required turbine overspeed protection system shall be demonstrated OPERABLE; (1) prior to admitting steam to the turbine during each startup unless performed within the past 7 days, (2)* vi~in 24 he¥~s ef a~~aiRiRg g&ea~e& taaR e& e~\Wil ~e 8§% ef Rt.TED T-HKRMaY:. PGWBR; and (3) at a frequency not to exceed one year* by direct observation of the movement of each of the following valves through at least one complete cycle from the running position.

a. Four high pressure turbine stop valves.

b. Four high pressure turbine control valves.

c. Six low pressure hot reheat stop valves.

d. Six low pressure hot reheat intercept valves.

• The above valves are to be tested at a frequency consistent with the methodology presented in WCAP-11525, "Probabilistic Evaluation of Reduction in Turbine Valve Test Frequency*, and in accordance with the established NRC acceptance cr!5eria for the probability of a missile ejection incident of 1.0 x 10 per year, in no case shall the test interval for the above valves exceed one year.

SALEM - UNIT 1 3/4 3-70 Amendment No. 115

(

I 9101020125 901221 PDR ADOCK 05000272 I p PDR I

INSERT A (2) Following startup, within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of attaining manufacturer's recommended power level for performing turbine valve testing.

i BASES.

.e 3/4.3.4 TQRBINI OYERSPEED PROTECTION This specification is provided to ensure that the turbine overspeed protection instrumentation and the turbine speed control valves are OPERABLE and will protect the turbine from excessive overspeed, Protection from turbine excessive overspeed is required since excessive overspeed of the.*turbine could generate potentially damaging missiles which could impact and damage safety-related components, equipment or structures.

X:tJSE(L.."I" B Te pi:e"lea'e Ele'\!ele sh:eeki:Rg tfie tllli'ai.R* 1 'JaJ.ve tuti.Rg is Reti H'l'l:liPeEl '..:'Ren s~eall is eei:Rg a&lllitted ta tae tw.rbiAtl and T.Hii.K~~ iow:ill ia J.e1a taaR S5' ef Rt-'riD ~iRKU. Powmt, prg"ided tba ualuu are teata4 prhw tie stia:Ewp aae widi.ifl a4 aaw.n gf atta1nili& SS' gf R~ED Tllii'X.-\1. l!OW:U.,

During normal operation, turbine valve testing is performed at a frequency consistent with the methodology presented in WCAP-11525, "Probabilistic Evaluation of Reduction in Turbine Valve Frequency." This report evaluates the contribution of failure* or unavailability of the turbine valve safety function to the probability that the turbine will overspeed and eject a missile. It concludes that extended intervals between turbine valve functional tests can be achieved without exceeding the NRC acceptance criteria

• for the probability of a turbine missile ejection incident. Factors which affect the selected valve test interval include low pressure turbine rotor type and inspection interval; turbine valve type, arrangement and overspeed controls; and secondary side water chemistry.

SALEK - UNIT 1 B 3/4 3-4 Amendment No. 115

INSERT B Salem Unit 1 turbine is operated at full time partial arc admission. To prevent double shocking the turbine, perform turbine valve testing in accordance with manufacturer's recommendations.

INSTRtJMENTATION e 3/4.3.4 TIJR!IN! QVERSPEED PROTECTION LIMITING CONDITION FOR OPERATION 3.3.4 AC least one turbine overspeed protection system shall be OPERABLE.

APPLICABILITY: MODES l, 2 and 3.

ACTION:

a. With one stop valve or one control valve per high pressure turbine steam lead inoperable and/or with one reheat stop valve or one reheat intercept valve per low pressure turbine steam lead inoperable, restore the inoperable valve(s) to the OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or close at least one valve in the affected steam lead; otherwise, isolate the turbine from the steam supply within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

b. With the above required turbine overspeed protection system otherwise inoperable, within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> either restore the system to OPERABLE status or isolate the turbine from the steam supply.

SURVEILI.ANCE REQUIREMENTS 4.3.4.1 The provisions of Specification 4.0.4 are not applicable.

4.3.4.2 The above required turbine overspeed protection system shall be demonstrated OPERABLE; (1) prior to admitting steam to the turbine during each startup unless performed within the past 7 days, (2) withift 24 4ie~Ps ei attaieieg gEeateF tAae eF e~wal te 85* ef R:a.~till 'alEBMa\la PetJBR, and (3) at a frequency not to exceed one year* by direct observation of the movement of each of the following valves through at least one complete cycle from the running position.

a. Four high pressure turbine stop valves,

b. Four high pressure turbine control valves.

c. Six low pressure hot reheat stop valves.

d. Six low pressure hot reheat intercept valves.

• The above valves are to be tested at a frequency consistent with the methodology presented in WCAP-11525, nprobabilistic Evaluation of Reduction in Turbine Valve Test Frequency*, and in accordance with the established NRC acceptance cr!§eria for the probability of a missile ejection incident of 1.0 x 10 per year, in no case shall the test interval for the above valves exceed one year.

SALEM - UNIT 2 3/4 3-65 Amendment No. 97

t INSERT C (2) Following startup, within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of attaining manufacturer's recommended power level for performing turbine valve testing.

L__

INSTRUMENIATION I

. BASES 3/4.3.3.8 RAPIOACTIVE LIQUID EFFLUENT MONITORING INS!RVMENIATION The radioactive liquid effluent instrumentation is provided to monitor and control, as applicable, the releases of radioactive materials in liquid effluents during actual or potential releases of liquid effluents. The alarm/trip setpoints for these instruments shall be calculated and adjusted in accordance with the procedures in the ODCM to ensure that the alarm/trip will occur prior to exceeding the limits of 10 CFR Part 20. The OPERABILITY and use of this instrumentation is consistent with the requirements of General Design Criteria 60, 63, and 64 of Appendix A to 10 CFR Part SO. The purpose of tank level indicating devices is to assure the detection and control of leaks that if not controlled could potentially result in the transport of radioactive materials to UNRESTRICTED AREAS.

3/4.3.3.9 RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENIATION The radioactive gaseous effluent instrumentation is provided to monitor and control, as applicable, the releases of radioactive materials in gaseous effluents during actual or potential releases of gaseous effluents, The alarm/trip setpoints for these instruments shall be calculated and adjusted in accordance with the procedures in the ODCM to ensure that the alarm/trip will occur prior to exceeding the limits of 10 CFR Part 20. This instrumentation also includes provisions for monitoring (and controlling) the concentrations of potentially explosive gas mixtures in the waste gas holdup system. The OPERABILITY and use of this instrumentation is consistent with the requirements of General Design Criteria 60, 63, and 64 of Appendix A to 10 CFR Part SO.

3/4.3.4 TIJRBINE OVERSPEED PROTECTION This specification is provided to ensure that the turbine overspeed protection instrumentation and the turbine speed control valves are OPERABLE and will protect the turbine from excessive overspeed. Protection from turbine excessive overspeed is required since excessive overspeed of the turbine could generate potentially damaging missiles which could impact and damage safety-related components, equipment or structures.

To preoen~ do~ele shoekiRg Ehe c~FeiRe, va~ve cesciag is aee ~e~~iFea wheR

. s10eam is lae:111og adait10ed 100 ta* t'ol.t:Bi&e a&d 'tl:IEMM. pow;g is less tl:laa 8§' ef RATE9 THBBMM. P9WIR:, p!'e'.rided tae vah*es a!'e taste& p!'iH' te sta!'tl:lp aaEl wit.Ria 24 hew:a ef aeeai:Riag 8§% ef IU\TEB TUER..'ikb P0WB: *.

IrJs~tc.~ b SALEM - UNIT 2 B 3/4 3-3 Amendment No.97

INSERT D Salem Unit 2 turbine is operated at full time full arc admission.

To prevent excessive steam flow induced cyclic stresses of the control stage blading, perform turbine valve testing in accordance with manufacturer's recommendations.