Text

Proposed Tech Specs Revising TS 3/4.8.1, AC Sources - Operating & Associated Bases to Clarify Intent of TS
	ML18016A224
Person / Time
Site:	Harris
Issue date:	10/29/1997
From:	; CAROLINA POWER & LIGHT CO.
To:	;
Shared Package
ML18016A223	List: ML18016A222; ML18016A224;
References
	NUDOCS 9711030264
	Download: ML18016A224 (21)
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ENCL'OSURE 1 TO SERIAL: HNP-97-164 SHEARON HARRIS NUCLEAR POWER PLANT NRC DOCKET, NO. 50-400/LICENSE NO. NPF-63

'REQUEST'FOR LICENSE AMENDMENT TECHNICALSPECIFICATION 3/4.8.1, A.C. SOURCES - OPERATING BASIS FOR CHANGE RE UEST B~ack round if Ifone or both offsite circuits become inoperable or an Emergency Diesel Generator (EDG) becomes inoperable, TS 3.8.1.1.a.3, 3.8.1.1.b.4, and 3.8.1.1.d.2 require verifying that required features powered from the opposite train A.C. sources are operable. Per NUREG -1431, the intent of this requirement is to provide assurance that an event coincident with the single failure of an EDG or an offsite power circuit will not result in the complete loss of safety function of

d d 1* 4NUBBG-143 8 381,, dC~dC..C are imposed to restore the required feature or an inoperable power source. The completion time to restore the required feature or an inoperable power source varies depending on the availability and type of the remaining power sources. The purpose of this completion time is to allow a reasonable time for repairs while taking into account the capacity and capability of the remaining A.C. sources. Additionally, the low probability of a Design Basis Accident is considered. Once the completion time has expired, NUREG -1431, Revision 1, requires declaring the redundant required feature inoperable, when the required feature powered from the operable A.C. source is inoperable. For this Action, NUREG -1431, Revision 1 does not impose a separate shutdown requirement.

Currently, Harris Nuclear Plant (HNP) TS require a plant shutdown and declaring the redundant required feature inoperable, when the required feature powered from the operable A.C. source is inoperable. For example, if"A"EDG was inoperable concurrent with "B" Component Cooling Water Pump (required feature) being inoperable, then after 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months the "A" Component Cooling Water (CCW) Pump (redundant required feature) would be declared inoperable. HNP TS then require the plant to be in Hot Standby within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in Cold Shutdown within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months , or within the TS Action time of the applicable Action statement, whichever is more limiting. In this example, both CCW pumps would be considered inoperable, forcing entry into TS 3.0.3. TS 3.0.3 requires the plant to be in Hot Standby within 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months , therefore the requirement in TS 3.8.1.1 to be in Hot Standby within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months would be more limiting.

Pro osed Chan e TS 3.8.1.1.a.3, 3.8.1.1.b.4, and 3.8.1.1.d.2 presently require a plant shutdown and declaring the redundant required feature inoperable, when the required feature powered from the operable A.C.

source is inoperable. The proposed change clarifies the intent of this TS to permit the applicable redundant required feature TS to direct a plant shutdown when required. The proposed amendment changes the existing TS 3.8.1.1.a.3, 3.8.1.1.b.4, and 3.8.1.1.d.2 to eliminate the separate requirement for plant shutdown and instead allows the applicable required redundant feature TS to direct the plant shutdown when required.

97ii0302b4 97i029 05000400 PDR ADGCK P PDR Page E1- 1

ENCLOSURE 1 TO SERIAL: HNP-97-164 Basis The proposed, change.to TS 3.8.1.1.a.3, 3.8.1.1.b.4, 3.8.1.1.d.2,.and the associated Bases is consistent with NUREG -1431, Revision 1. The respective completion times are based on the capability and availability of the remaining A.C. source(s) (NUREG-1431 Bases A.3, ~B.2 . Also considered were the low probability of a Design Basis Accident while this condition exists, as well as the understanding that the required safety function is still available although the single failure criteria in regards to a component's power supply cannot be met in this condition.

HNP TS Limiting Condition for Operation (LCO) and associated action times have been established for both degraded conditions and for the complete loss of a safety function.

Generally, ifa condition exists where a complete loss of function is detected, then the TS LCO would normally require a plant shutdown in accordance with TS 3.0.3.

However, there are systems, where ifthe complete safety function is lost, the plant is not required to shutdown immediately. For example, HNP has two Containment Hydrogen Monitors which are safety related and perform the safety related function of monitoring Hydrogen levels in containment following a Loss of Coolant Accident (LOCA). HNP's current TS, as well as NUREG -1431, Revision 1, require 30 days completion time (or out of service time) ifone Hydrogen Monitor is inoperable and 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months completion time ifboth Hydrogen Monitors are inoperable. Therefore, the safety function of monitoring the Containment Hydrogen level can be completely lost without requiring an immediate plant shutdown. It has been previously analyzed that this additional time is appropriate to effect repairs, because an unnecessary plant shutdown is not desirable due to the potential transients associated with the shutdown.

HNP TS also'require a plant shutdown ifa condition is reached where a safety function could be potentially lost due to an A.C. source being inoperable. In some cases, this potential loss of a safety function has more severe consequences, in terms of TS action requirements, than the actual loss of the safety function. For example, if"A" and "B" Hydrogen Monitors are inoperable, then the safety function is lost and the TS action statement requires restoration of at least one Hydrogen Monitor (and the safety function) within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or the unit must be shutdown. However, if"A"Hydrogen Monitor and "B" EDG are inoperable then there is a "potential" loss of the safety function and either the Hydrogen Monitor or the EDG must be restored within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months or the unit must be shutdown. In this case, the TS actions for the potential loss of the safety function are more restrictive than the actual loss of the same safety function.

The intent of this TS and associated Bases change is to resolve this disparity by using wording from NUREG -1431, Revision 1. The proposed change would allow the associated component TS to determine the shutdown requirements ifa potential loss of a safety function exists due to an inoperable A.C. source. Some safety functions, such as those of the Component Cooling Water pumps, are more critical than Containment Hydrogen Monitoring. Consequently, the TS actions for the systems associated with this safety function are more restrictive than Containment Hydrogen Monitoring. The method affirmed by NUREG -1431, Revision 1, for inoperable A.C.

sources preserves the limitations for operation with the potential of a loss of safety function while Page El- 2

ENCLOSURE 1 TO SERIAL: HNP-97-164 concurrently allowing extra out of service time for systems of those safety functions deemed not as critical, as evidenced by the associated TS action completion times being longer.

Conclusions TS 3.8.1.1.a.3, 3.8.1.1.b.4, 3.8.1.1.d.2, and the associated Bases as currently written, do not distinguish between the importance of redundant required features.

The proposed amendment will permit the affected system TS to determine when a unit shutdown is required. The times allowed for loss of a safety function have already been determined in the individual TS. The proposed change will not alter individual system TS action times. HNP proposes to change the requirement to shutdown after expiration of the completion time of an inoperable A. C. source concurrent with an inoperable required feature. Instead of requiring a shutdown, the required feature on the inoperable A.C. source will be declared inoperable and the individual TS will be implemented.

In most cases with both redundant features inoperable, a plant shutdown will be required by TS 3.0.3. In the few instances where additional time is allowed by the individual TS for both redundant required features being inoperable, then an immediate plant shutdown would not be required. The allowed out of service time for loss of individual safety functions has been previously analyzed for HNP TS and NUREG -1431, Revision 1.

Page El- 3

ENCLOSURE 2 TO SERIAL: HNP-97-164 SHEARON HARRIS NUCLEAR POWER PLANT NRC DOCKET NO. 50-400/LICENSE NO. NPF-63

" 'REQUEST FOR LICENSE AMENDMENT TECHNICALSPECIFICATION 3/4.8.1, A.C. SOURCES - OPERATING 10 CFR 50.92 EVALUATION The Commission has provided standards in 10 CFR 50.92(c) for determining whether a significant hazards consideration exists. A proposed amendment to an operating license for a facility involves no significant hazards consideration ifoperation of the facility in accordance with the proposed amendment would not: (1) involve a significant increase in the probability or consequences of an accident previously evaluated, (2) create the possibility of a new or different kind of accident from any accident previously evaluated, or (3) involve a significant reduction in a margin of safety. Carolina Power & Light Company has reviewed this proposed license amendment request and determined that its adoption would not involve a significant hazards determination. The bases for this determination are as follows:

Pro osed Chan e TS 3.8.1.1.a.3, 3.8.1.1.b.4, and 3.8.1.1.d.2 presently require a plant shutdown and declaring the redundant required feature inoperable, when the required feature powered from the operable A.C.

source is inoperable. The proposed change clarifies the intent of this TS to permit the applicable redundant required feature TS to direct a plant shutdown when required. The proposed amendment changes the existing TS 3.8.1.1.a.3, 3.8.1.1.b.4, and 3.8.1.1.d.2 to eliminate the separate requirement for plant shutdown and instead allows the applicable required redundant feature TS to direct the plant shutdown when required.

Basis This change does not involve a significant hazards consideration for the following reasons:

The proposed amendment does not involve a significant increase in the probability or consequences of an accident previously evaluated.

The proposed amendment will not introduce any new equipment or require existing equipment to function different from that previously evaluated in the Final Safety Analysis Report (FSAR) or TS. The changes are consistent with NUREG-1431 and the Commission's Final Policy Statement on Technical Specification improvements.

Therefore, the proposed change does not involve a significant increase in the probability or consequences of an accident previously evaluated.

Page E2- 1

ENCLOSURE 2 TO SERIAL: HNP-97-164

2. - The proposed. amendment does not create the possibility of a new or different kind of accident from any accident previously evaluated.

The proposed amendment will not introduce any new equipment or require existing equipment to function different from that previously evaluated in the Final Safety Analysis Report (FSAR) or TS. The changes are consistent with NUREG-1431 and the Commission's Final Policy Statement on Technical Specification improvements.

The proposed amendment will not create any new accident scenarios, because the change does not introduce any new single failures, adverse equipment or material interactions, or release paths.

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

The proposed amendment does not involve a significant reduction in the margin of safety.

Margin of safety for acceptable TS action times have been determined for each TS related system. The proposed change will not alter individual system TS action times. HNP proposes to change the requirement to shutdown after expiration of the completion time of an inoperable A. C. source concurrent with an inoperable required feature. Instead of requiring a shutdown, the required feature on the inoperable A.C. source willbe declared inoperable and the individual TS will be implemented.

In most cases with both redundant features inoperable, a plant shutdown will be required by TS 3.0.3. In the few instances where additional time is allowed by the individual TS for both redundant required features being inoperable, then an immediate plant shutdown would not be required. The allowed out of service time for loss of individual safety functions has been previously analyzed for HNP TS and NUREG -1431, Revision 1.

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

Page E2- 2

ENCLOSURE 3 TO SERIAL: HNP-97-164 SHEARON HARRIS NUCLEAR POWER PLANT NRC DOCKET NO. 50-400/LICENSE NO. NPF-63 REQUEST FOR LICENSE A1VKNDMENT TECHNICALSPECIFICATION 3/4.8.1, A.C. SOURCES - OPERATING ENVIRONMENTALCONSIDERATIONS 10 CFR 51.22(c)(9) provides criterion for and identification of licensing and regulatory actions eligible for categorical exclusion from performing an environmental assessment. A proposed amendment to an operating license for a facility requires no environmental assessment if operation of the facility in accordance with the proposed amendment would not: (1) involve a significant hazards consideration; (2) result in a significant change in the types or significant increase in the amounts of any effluents that may be released offsite; (3) result in a significant increase in individual or cumulative occupational radiation exposure. Carolina Power Ec Light Company has reviewed this request and determined that the proposed amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9). Pursuant to 10 CFR 51.22(b), no environmental impact statement or environmental assessment needs to be prepared in connection with the issuance of the amendment. The basis for this determination follows:

Pro osedChan e TS 3.8.1.1.a.3, 3.8.1.1.b.4, and 3.8.1.1.d.2 presently require a plant shutdown and declaring the redundant required feature inoperable, when the required feature powered from the operable A.C.

source is inoperable. The proposed change clarifies the intent of this TS to permit the applicable redundant required feature TS to direct a plant shutdown when required. The proposed amendment changes the existing TS 3.8.1.1.a.3, 3.8.1.1.b.4, and 3.8.1.1.d.2 to eliminate the separate requirement for plant shutdown and instead allows the applicable required redundant feature TS to direct the plant shutdown when required.

Basis The change meets the eligibilitycriteria for categorical exclusion set forth in 10 CFR 51.22(c)(9) for the following reasons:

1. As demonstrated in Enclosure 2, the proposed amendment does not involve a significant hazards consideration.

The proposed amendment does not result in a significant change in the types or increase in the amounts of any effluents that may be released offsite.

The proposed change does not involve any new equipment or require existing systems to perform a different type of function than they are currently designed to perform. The change does not introduce any new effluents or increase the quantities of existing effluents. As such, the change cannot affect the types or amounts of any effluents that may be released offsite.

Page E3- 1

ENCLOSURE 3 TO SERIAL: HNP-97-164 3.," ',"The'-proposed amendment does not result in a significant increase in individual or

...cumulative occupational radiation exposure.

The proposed change does not result in any physical plant changes or new surveillance which would require additional personnel entry into radiation controlled areas.

Therefore, the amendment has no affect on either individual or cumulative occupational radiation exposure.

Page E3- 2

'ENCL'OSURE 4 TO SERIAL: HNP-97-164 SHEARON HARRIS NUCLEAR POWER PLANT NRC DOCKET NO. 50-400/LICENSE NO. NPF-63 REQUEST FOR LICENSE AMENDMENT TECHNICALSPECIFICATION 3/4.8.1, A.C. SOURCES - OPERATING PAGE CHANGE INSTRUCTIONS Removed Pa e Inserted Pa e 3/4 8-1 3/4 8-1 3/4 8-2 3/4 8-2 3/4 8-3 3/4 8-3 B 3/4 8-1 B 3/4 8-1 Page E4- 1

, ENCLOSURE 5 TO SERIAL: HNP-97-164 SHEARON HARRIS NUCLEAR POWER PLANT NRC DOCKET NO; 50-400/LICENSE NO. NPF-63

'EQUEST FOR LICENSE AMENDMENT TECHNICALSPECIFICATION 3/4.8.1, A.C. SOURCES - OPERATING TECHNICALSPECIFICATION PAGES Page E5- 1

Tech. Spec. Tach. Spec.

Tech. Spec.

3 4.8 CTRICA POW R SYST HS Intorprotadbn totorprotatbn 4 A. . SOURC S trttorprotothn

~t-3 Toch. Spoc.

~OP NAT NO Tech. Spec. lntorprotitfon Into tptnnnlnn LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

a. Two physically independent circuits between the offsfte transmission network and the onsfte Class )E distribution system, and

b. Two sepat ate and independent diesel generators, each with:

l. A separate day tank containing a minimum of 1457 gallons of indicated level of fuel, which fs equivalent to a minimum 4Ã~,

'. A of separate main fuel 100,000 gallons oil storage tank containing of fuel, and a minimum

3. A separate fuel oil transfer pump.

c. Automatic Load Sequencers for Train A and Train B.

II 33 3 3 3

~ACT ON:

a. With one offsite circuit of 3.8.1.l.a inoperable:

Perform Surveillance Requirement 4.8.l.l.l.a within 1 hour and once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; and 2n Restore the offsfte circuit to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be fn at least 'HOT STANDBY wfthfn the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ; and 3~ Verify required feature(s) powered from the OPERABLE offsfte A.C.

source are OPERABLE. If required feature(s) powered from the OPERABLE offsite circuit are discovered to be inoperable at any time while in this condition, restore the required feature{s) to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ftom discovery of inoperable required feature{s) or declare the redundant required feature s powered urce as inoperable i

Hfnfmuta indicated level with a fuel ofl specific gravity of 0.83 and the level fnstrumentatfon calfbrated to a reference specific gravity of 0.876.

SHEARON HARRIS - UNIT I 3/4 8-1 Amendment No. 51 t

ELECTRICAL PO SYSTEMS A.C. SOURCES OPERATING LIHITING CONDITION FOR OPERATION

b. With one diesel generator of 3.8.1.l.b inoperable:

1. Perform Surveillance Requirement 4.8.l.l.l.a within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; and

2. Within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , determine the OPERABLE diesel generator is not inoperable due to a common cause failure or perform Surveillance Requirement 4.8.1.1.2.a.48; and

3. Restore the diesel generator to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ; and

4. Verify required feature(s) powered from the OPERABLE diesel generator are OPERABLE. If required feature(s) powered from the OPERABLE diesel generator are discovered to.be inoperable at any time while in this condition, restore the required feature(s) to OPERABLE status within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months from discovery of inoperable required feature(s) or declare the redundant required feature s owered f t i erable A.C. source as inoperable C. With one o s>te circuit and one diesel geherator of 3.8.1.1 inoperable:

NOTE: Enter applicable Condition(s) and Required Action(s) of LCO 3/4.8.3, ONSITE POWER DISTRIBUTION - OPERATING, when this condition is entered with no A.C. power to one train.

Restore one of the inoperable A.C. sources to OPERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

2. Following restoration of one A.C. source (offsite'circuit or diesel generator), restore the remaining inoperable A.C. source to OPERABLE status pursuant to requirements of either ACTION a or b, based on the time of initial loss of the remaining A.C. source.

This ACTION is required to be completed regardless of when the inoperable EDG restored to OPERABILITY.

)'s 8Activities that normally support testing pursuant to 4.8.1. 1.2.a.4, which would render the diesel inoperable (e.g., air roll), shall not be performed for testing required by this ACTION statement.

SHEARON HARRIS - UNIT 1 3/4 8-2 Amendment No. >>

ELECTRICAL P SYSTEMS A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION d:

d. With two of the required offsite A.C. sources inoperable:

I. Restore one offsite circuit to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ; and

2. Verify required feature(s) are OPERABLE. If required feature(s) are discovered to be inoperable at any time while in this condition,. restore the required feature(s) to OPERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months from discover of inoperable required feature or declare undant re u feature s ino erable

'3. Following restoration of one offsite A.C. source, restor'e the remaining offsite A.C. source in accordance with the provisions of ACTION a with the time requirement of that ACTION based on the time of initial loss of the remaining inoperable A.C. source.

e. With two of the required diesel generators inoperable:

Perform Surveillance Requirement 4.8.1.1. I.a within I hour and once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; and

82. Restore one of the diesel generators to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

3. Following restoration of one diesel generator, restore the remaining diesel generator in accordance with the nrovisions of ACTION b with the time requirement of that ACTION based on the time of initial loss of the remaining inoperable diesel generator.

With three or more of the required A.C, sources inoperable:

Immediately enter Technical Specification 3.0.3.

2. Following restoration of one or more A.C. sources, restore the remaining inoperable A.C. sources in accordance with the provisions of ACTION a b c,d and/or e as applicable with the time requirement of that ACtIPN based on the time of initial loss of the remaining inoperable A.C. sources.

With contiguous events of either an offsite .or onsite A.C. source becom ing inoperable and resulting in failur'e to meet the LCO:

Within 6 days, restore all A.C. sources required by 3.8.1. I or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

SActivit'ies that normally support testing pursuant to 4.8.1.1.2.a.4, which would render the diesel inoperable (e.g., air roll), shall. not be performed for testing required by this ACTIOH statement.

SHEARON HARRIS - UNIT I 3/4 8-3 Amendment No. 51

3 4.8 ELECTR POWER SYSTEMS BASES 3 4.8. I 3 4.8.2 AND 3 4.8.3 A.C. SOURCES D.C. SOURCES AND ONSITE POWER The OPERABILITY of the A.C. and D.C power sources and associated distribution systems durinq operation ensures that. sufficient power will be available to supply the safety-related equipment'equired for: (I) the 'safe shutdown of the facility, and (2) the mitigation and control of accident conditions within the facility. The minimum specified independent and redundant A.C. and D.C.

ower sources and distribution systems satisfy the requirements of General esign Criterion 17 of Appendix A to 10 CFR Part 50.

The switchyard is designed using.a breaker-and-a-half scheme. The switchyard currently has seven connections with the CP&L transmission network; each of these transmission lines is physically independent. The switchyard has one connection with each of the two Startup Auxiliary Transformers and each SAT, can be fed directly from an associated offsite transmission line. The Startup

-Auxiliary Transformers are the preferred power source for the Class IE ESF buses. The minimum alignment of offsite power sources will be maintained such that at least two physically independent offsite circuits are available. The two physically independent circuits may consist of any two of the incoming transmission lines to the SATs (either through the switchyard or directly) and

.into the Class lE system. As long as there are at least two transmission lines in service and two circuits through the SATs to the Class IE buses, the LCO is met.

During NODES 5 and 6 the Class IE buses can be energized from the offsite transmission net worfc via a combination of the main transformers, and unit auxiliary transformers. This arrangement may be used to satisfy the requirement of one physically independent circuit.

The ACTION requirements specified for the levels of degradation of the power sources"provide restriction upon continued facility operation commensurate with the level of degradation. The OPERABILITY of the power sources are consistent with the initial condition assumptions of the safety analyses and are based upon maintaining at least one redundant set of onsite A.C. and D.C.

power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss-of-offsite power and single failure of the other onsite A.C. source. The A.C. and D.C. source allowable out-of-service times are based on Regulatory Guide 1.93, "Avai'lability of Electrical Power Sources " December 1974. There are additional ACTION requirements to verify tfiat all required feature(s) that depend on the remaining OPERABLE A.C. sources as a source of emergency power, are also OPERABLE. These requirements allow a period of time to restore any required feature discovered to be inoperable, e.g. out-of-service for maintenance, to an OPERABLE status. If the required feature(s) cannot be restored to an OPERABLE status, the ACTION statement requires the redundant required feature, i.e. feature r ceivin er rom an ino er source, .to be declared inoperable, The allowed operating times to re an inopera e i ea ure o OPERABLE status is based on the requirements in NUREG 1431. The term "verify", as used in these ACTION statements means to administratively check by examining logs or other information to determine the OPERABILITY of required feature(s). It does not mean to perform the Surveillance Requirement needed to demonstrate the OPERABILITY of the required feature(s).

SHEARON HARRIS - UNIT I B 3/4 8-1'mendment No. 51

3/4.8 ELECTRICAL POW R SYSTEMS 3/4.8.1 A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION 3.8.1. 1 As a minimum. the following A.C. electrical power sources shall be OPERABLE:

a. Two physically independent circuits between the of/site transmission network and the onsite Class 1E distribution system, and .

b. Two separate and independent diesel generators, each with:

1. A separate day tank containing a minimum of 1457 gallons of fuel, which is equivalent to a minimum indicated level of 40/~

2. A separate main fuel oil storage tank containing a minimum of 100,000 gallons of fuel, and

3. A separate fuel oil transfer pump.

c. Automatic Load Sequencers for Train A and Train B.

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

With one offsite circuit of 3.8. 1. 1.a inoperable

1. Perform Surveillance Requirement 4.8. l. 1. l.a within 1 hour and once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; and

2. Restore the offsite circuit to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ; and

3. Verify required feature(s) powered from the OPERABLE offsite A.C.

source are OPERABLE. If required feature(s) powered from the OPERABLE offsite circuit are discovered to be inoperable at any time while in this condition, restore the required feature(s) to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months from discovery of inoperable required feature(s) or declare the redundant required feature(s) powered from the inoperable A.C. source as inoperable.

~Minimum indicated level with a fuel oil specific gravity of 0.83 and the level instrumentation calibrated to a reference specific gravity of 0.876.

SHEARON HARRIS - UNIT 1 3/4 8-1 Amendment No.

A

'LECTRICAL POWER SYST MS A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION

~ACiltlN C ti d

b. With one diesel generator of 3.8.1. l.b inoperable:

1. Perform Surveillance Requirement 4.8. 1. 1. l.a within 1 hour and once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; and

2. Within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , determine the OPERABLE diesel generator is not inoperable due to a common cause fai lure or perform Surveillance Requirement 4.8. 1. 1.2.a.4j", and

3. Restore the diesel generator to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ; and

4. Verify required feature(s) powered from the OPERABLE diesel generator are OPERABLE. If required feature(s) powered from the OPERABLE diesel generator are discovered to be inoperable at any time while in this condition, restore the required feature(s) to OPERABLE status within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months from discovery of inoperable required feature(s) or declare the redundant required feature(s) powered from the inoperable A.C. source as inoperable.

With one offsite circuit and one diesel generator of 3.8. 1. 1 inoperable:

NOTE: Enter applicable Condition(s) and Required Action(s) of LCO 3/4.8.3, ONSITE POWER DISTRIBUTION - OPERATING, when this condition is entered with no A.C. power to one train.

1. Restore one of the inoperable A.C. sources to OPERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

2. Following restoration of one A.C. source (offsite circuit or diesel generator), restore the remaining inoperable A.C. source to OPERABLE status pursuant to requirements of either ACTION a or b, based on the time of initial loss of the remaining A.C. source.

~This ACTION is required to be completed regardless of when the inoperable EDG is restored to OPERABILITY.

$ Activities that normally support testing pursuant to 4.8. 1. 1.2.a.4.

which would render the diesel inoperable (e.g., air roll), shall not be performed f'r testing required by this ACTION statement.

SHEARON HARRIS - UNIT 1 3/4 8-2 Amendment No.

L ELECTRICAL POWER SYS MS.,.....,

A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION ACTION Continued With two of the required offsite A.C. sources inoperable:

1. Restore one offsite circuit to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ; and

2. Verify required feature(s) are OPERABLE. If required feature(s) are discovered to be inoperable at any time while in this condition, restore the required feature(s) to OPERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months from discovery of inoperable required feature(s) or declare the redundant required feature(s) inoperable.

3. Following restoration of one offsite A.C. source, restore the remaining offsite A.C. source in accordance with the provisions of ACTION a with the time requirement of that ACTION based on the time of initial loss of the remaining inoperable A.C. source.

e. With two of the required diesel generators inoperable:

1. Perform Surveillance Requirement 4.8. 1. 1. l.a within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereatter; and g2. Restore one of the diesel qenerators to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least ROT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

3. Following restoration of one diesel generator, restore the remaining diesel generator in accordance with the provisions of ACTION b with the time requirement of that ACTION based on the time of initial loss of the remaining inoperable diesel generator.

With three or more of the required A.C. sources inoperable:

1. Immediately enter Technical Specification 3 '.3.

2. Following restoration of one or more A.C. sources. restore the remaining inoperable A.C. sources in accordance with the provisions of ACTION a b c,d and/or e as applicable with the time requirement of'hat ACTION based on the time of initial loss of the remaining inoperable A.C. sources.

With contiguous events of either an offsite or onsite A.C. source becoming inoperable and resulting in failure to meet the LCO:

1. Within 6 days, restore all A.C. sources required by 3.8. 1.1 or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

gActivities that normally support testing pursuant to 4.8. 1. 1.2.a.4, which would render the diesel inoperable (e.g., air roll), shall not be performed for testing required by this ACTION statement.

SHEARON HARRIS - UNIT 1 3/4 8-3 Amendment No.

II 3/4.8 ELECTRICAL POW R SYSTEMS BASES

.3/4.8. 1 3/4.8.2 AND 3/4.8.3 A.C. SOURCES D.C. SOURCES AND ONSITE POWER The OPERABILITY of the A.C. and D.C power sources and associated distribution systems during operation ensures that sufficient power will be available to supplY the safety-related equipment required for: (1) the safe shutdown of the facility. and (2) the mitigation and control of accident conditions within the facility. The minimum specified independent and redundant A.C. and D.C.

ower sources and distribution systems satisfy the requirements of General esign Criterion 17 of Appendix A to 10 CFR Part 50.

The switchyard is designed using a breaker-and-a-half scheme. The switchyard currently has seven connections with the CP8L transmission network: each of these transmission lines is physically independent. The switchyard has one connection with each of the two Startup Auxiliary Transformers and each SAT can be fed directly from an associated offsite transmission line. The Star tup Auxiliary Transformers are the preferred power source for the Class 1E ESF buses. The minimum alignment of offsite power sources will be maintained such that at least two physically independent offsite circuits are available. The two physically independent circuits may consist of any two of'he incoming transmission lines to the SATs (either through the switchyard or directly) and into the Class 1E system. As long as there are at least two transmission lines in service and two circuits through the SATs to the Class 1E buses. the LCO is met.

During MODES 5 and 6, the Class 1E buses can be energized from the offsite transmission net work via a combination of the main transformers. and unit auxiliary transformers. This arrangement may be used to satisfy the requirement of one physically independent circuit.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation. The OPERABILITY of the power sources are consistent with the snitial condition assumptions of the safety analyses and are based upon maintaining at least one redundant set of onsite A.C. and D.C.

power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss-of-offsite power and single failure of the other onsite A.C. source. The A.C. and D.C. source allowable out-of-service times are based on Regulatory Guide 1.93, "Availability of Electrical Power Sources," December 1974. There are additional ACTION requirements to verify that all required feature(s) that depend on the remaining OPERABLE A.C. sources as a source of emergency power, are also OPERABLE. These requirements allow a period of time to restore any required feature discovered to be inoperable, e.g. out-of-service for maintenance. to an OPERABLE status. If the required feature(s) cannot be restored to an OPERABLE status, the ACTION statement requires the redundant required feature.

i.e. feature receiving power from an inoperable A.C. source, to be declared inoperable. The allowed operating times to restoie an inoperable required feature to an OPERABLE status is liased on the requirements in NUREG 1431. The term "verify", as used in these ACTION statements means to administratively check by examining logs or other information to determine the OPERABILITY of required feature(s). It does not mean to Perform the Surveillance Requirement needed to demonstrate the OPERABILITY of the required feature(s).

SHEARON HARRIS - UNIT 1 B 3/4 8-1 Amendment No.

4 4

ML18016A224

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