ML041270298

Proposed Mark-Up of Updated Safety Analysis Report Pages

ML041270298
Person / Time
Site:	Davis Besse
Issue date:	05/03/2004
From:	FirstEnergy Nuclear Operating Co
To:	Office of Nuclear Reactor Regulation
References
3006, LAR 03-0017
Download: ML041270298 (9)

Text

LAR 03-0017 PROPOSED MARK-UP OF UPDATED SAFETY ANALYSIS REPORT PAGES (7 pages follow)

D-B 3D.2.8 SAFETY GUIDE 8 -"PERSONNEL SELECTION AND TRATNING" (March 1971)

See Chapter 17.

I 3D2.9 SAFEMY GUIDE 9-t SELEC7ION OF DIESEL GENERATOR SET CAPACllY FOR STANDBY POWER SMPPLIES" (March 1971)

This system electrical design as described in Subsection 83.1.14.1 in the requirements of 120 this-Safety Guide c

aft C'I wta+#-l :W $%t"aJ.b:sE 3DZ10 SAFETY GD SPLTCES IN REINFORCING BARS OF CONCRETE CONTMhMENTS" This Safety Guide is not applicable to the Davis-Besse Nuclear Power Station.

3D.2-l1 SAFETY GUIDE I I-WSITRUMIENTLINES PENEp1RATNG PRIMARY.

REACTOR CONTrAINME 1Mar 971)

Instrument lines that penetrate the Containment Vessel arm equipped with isotion valves as described in Subsection 6.2.4. The only exceptions are the four instrument lines that provide containment pressure indication to the Reactor Protection System (RPS) and the Safety Features Actuation System (SFAS). The pressure switches and transmitters on these lines serve to maintain containment integrity in accordance ith GDC 55 and 56. A detailed discussion is presented in Subsection 6Z4.

3D.212 SAFE7Y GUIDE 12- *NSTRIUMETA77ON FOR EARTFIOUAKES" (March 1971)

Instrumentation which includes four stmag motion tiaxial accelerographs, peak accelerohs and a seismic trigger, has beei provided to monitor and record seismic disturbances at the station. A detailed discussion is presented in Subsection 3.7A.

3D.213 SAFETY GUIDE 13 - "IFUEL STRAGE FACILITY DESIGN BASISO (March 1971)

The design of the fuel storage facilty is in general conformance with the guidelines of this Safety Guide. The design of the various systems and facilities of the fuel handling area are discussed in Subsections:

9.1.1 and 9.1.2 forNew and Spent Fuel Storage 9

9.13 Spent Fuel Pool Cooling and Cleanup System 21 9A.2.2 Fuel Handling Area Ventilation The exceptions taken to the guide are as follows:

a.

During normal operation, the Fuel Handling Area Ventilation System is lined up so l20 that, in the event of a fuel handling accident, the normal Fuel Handling Area Ventilation System is automatically 3D40 REV21 11198

D-B INFORMATION ONLY Related Essential Function (refer Power to Section 8.1.3) supply Load High pressure injection pumps Decay heat removal pumps Component cooling pumps Service water pumps Containment spray pumps Containment air cooler fans Containment vessel recirculation fans Containment vessel hydrogen dilution blowers Hydrogen recombiner Containment vessel isolation valves Emergency ventilation fans Control room emergency ventilation fans Emergency diesel generator auxiliaries Engineered safety feature valves (1)

(1)

(1),(2),(5)

(1),(2),(5)

(2)

(2)

(6)

(6)

(6)

(3)

(4) 4.16kV AC 4.16kV AC 4.16kV AC 4.16kV AC 480V AC 480V AC 480V AC 480V AC 480V AC 12 480V AC 480V AC (4)

(1),(2),(3),(4),

(D), (6)

(1),(2),(3),(;)

480V AC 480V AC 480V AC and 125V DC Auxiliary feed pump controls (5) 125V DC Safety features actuation system Reactor protection system 1ain steam atmospheric vent valves 8.1.5 Desicn Bases (1),(2),(3),(4)

(5)

(As) 120V AC 120V AC 125V DC The electrical systems are designed to ensure that no single component failure will prevent operation of engineered safety systems. Redundant power sources are provided to ensure continuous operation of equipment under all modes of operation. Testing of systems is possible with the station in operation.

Electrical and physical separation of cables and equipment associated with redundant elements is provided.

The design documents that are implemented in the design of the electrical systems are listed below:

8.1-;

REV 2 7/S4

D-B Approval Document No.

Title Date

1. AEC Safety Independence Between Redundant Standby 3-10-71 Guide 6 (Onsite) Power Sources and Between Their Distribution Systems Safety Selection of Diesel Generator Set 3-10-71 Guide Capacity for Standby Power Supplies Safety Periodic Testing of Protection System 2-17-72 Guide 22 Actuation Functions Safety Quality Assurance Requirements for the 8-11-72 Guide 30 Installation, Inspection, and Testing of Instrumentation and Electric Equipment Safety Use of IEEE Standard 308-1971 "Criteria 8-11-72 Guide 32 for Class lE Electric System for Nuclear Power Generating Stations"

10CFRSO, General Design Criteria for Nuclear 2-10-71 Appendix Power Plants (as applicable)

'A

2.

IEEE 308 Criteria for Class 1E Electric Systems 9-16-71 for Nuclear Power Generating Stations 317 Electrical Penetration Assemblies in 2-4-71 Containment Structures for Nuclear Fueled Power Generating Stations 323 General Guide for Qualifying Class lE 2-4-71 Electric Equipment for Nuclear Power Generating Stations 334 Type Tests of Continuous-Duty Class 1E 9-16-71 Motors Installed Inside the Containment of Nuclear Power Generating Stations 336 Installation, Inspection, and Testing 9-16-71 Requirements for Instrumentation and Electric Equipment During the Construc-tion cf Nuclear Power Generating Stations a.1-6 REV 0 7/82

i-D-B 344 Seismic Qualification of Class IE 9-16-71 Electric Equipment for Nuclear Generating Stations 387 Criteria for Diesel-Generator Units

• Applied as Standby Power Supplies for Nuclear Power Generating Stations 12-2-71

3.

In addition to the above, the relevant ANSI, IPCEA and NEC recommendations are used as guides in the design.

4.

An ongoing program for environmental qualification is being implemented by DBNPS to qualify Class IE equipment to the requirements of 10CFR5OA9 I 22 19 During the design phase of Davis-Besse Unit 1, complete ad Guide 1.75 'Physical Independence of Electric Systems" wa the issuance of 1.75 as well as IEEE 384-1974. However, th design are considered adequate to preclude a common failur in fact, represent partial conformance. IEEE 279 and IEEE 3 the design phase of the plant with the exception, noted in Ch Class IE equipment and circuits is mainly by separate safety distance and barriers are utilized as acceptable alternates. Fi and electrical system design which provides that failure of ii redundant system.cannot disable Class IE circuits and equip redundant system. The routing of non-Class IE cables is dis4 VW lherence to the (February 1974) Regulatory s not possible since plant design pre-dated e independence principles followed in the e mode for any design basis event and do, 308, both 1971, were used as guides during Lapter 7. Separation between redundant

' class structures (rooms). However, urther, there is compatibility of mechanical elated mechanical equipment of one ment essential to the operation of the other cussed in Subsection 8.3.1.2.18.

8.1-7 REV22 11/00

D-B upon loss of the normal and the reserve power sources. Bus load shedding and isolation, bus transfer to the emergency diesel generator, and pickup of critical loads is automatic.

120 Each emergency diesel generator has the following ratings and characteristics:

Continuous rating 2000 hr. rating 200 hr. rating 30 minute rating

• Short-term rating Generator rating Assumed power factor 2600 kW 2838 kW 2946 kW 3035 kW 2860 kW 3250 kVA 0.8 j23

• Short-term rating is the electric power output capability that the emergency diesel generator can maintain in the service environment for two hours in any 24-hour period.

The emergency diesel generator is capable of attaining rated frequency and voltage approximately 10 seconds after the engine start signal is received.

119 Each of the two emergency diesel generators has the capability to:

a.

Supply continuously the sum of the load on the essential 4160V bus needed to be powered at any one time.

b.

Start and accelerate to rated speed in the required sequence its dedicated ldedicated engineered safety features loads. At no time-during the loading

\\sequence, will the fr-equency and voltage decrease to less than 95 percent

{

of nominal and 75 percent of nominal, respectively, except that during the first step in the required loading sequence, there may be a voltage dip below 75 percent of normal lasting for a few cycles due to the essential unit substation transformer excitation inrush.

During recovery from transients caused by step load increases or resulting from disconnection of largest load, the speed of the diesel engine will not exceed 75 percent of the difference between nominal speed (900 rpm) and the overspeed trip setpoint.

17 120

-'lvs,r+ A Each diesel will receive a starting signal when any one of the following occurs:

a.

Loss of essential bus voltage

b.

A safety feature actuation signal (SFAS level 2)

c.

Manual start (local or remote) 120 8.3-6 REV 23 11102

Insert A Start and accelerate to rated speed in the required sequence its dedicated engineered safety features loads. At no time during the loading sequence, will the frequency and voltage decrease to less than 95 percent of nominal and 75 percent of nominal, respectively, except that during the first step in the loading sequence with an SFAS signal present and during the steps in the loading sequence without an SFAS signal present, there may be a voltage dip and a frequency dip below these levels. This is an exception to Safety Guide 9. It has been determined that voltage could dip as low as 59% of nominal and frequency could dip as low as 88% of nominal during the first step in the loading sequence with an SFAS signal present. For the loss of offsite power only case, it has been determined that voltage could dip as low as 70% of nominal and frequency as low as 90% of nominal during the first load step, and the voltage could dip as low as 69%

of nominal for the second load step. Voltage will be restored to within 10 percent of nominal and frequency will be restored to within 2 percent of nominal in less than 40 percent of each load sequence time interval.

I D-B The physical arrangement of the air intake and exhaust for the emergency diesel generators is shown in Figure 8.3 Auxiliary Building Sections, and Figure 9.5 Diesel Generator Day Tank Location. The air intake filter and intake and exhaust silencers are located outside at the roof top of the auxiliary building above the diesel rooms.

Suitable enclosures are provided to protect the filter and silencers from missiles, tornadoes, snow, rain, etc.

Since the air intake is located outside of the diesel building, there is no possibility of fire extinguishing agents being drawn into the air intakes.

The physical separation of the intake and exhaust preclude significant recirculation of exhaust gas into the air intake.

f. Excitation and voltage regulating system -

a solid state excitation and voltage regulating system of the saturable current potential 20 transformer type, is provided for each emergency diesel generator unit.

The exciter is of the static type having fast response characteristics and reliability for allowing the startup of a heavy load parallel with a running load. The voltage regulator is a static type with silicon type rectifiers and provides the necessary excitation control to maintain the adjusted generator voltage with the generator operating at loads ranging from zero up to and including its overload capacity at rated power factor and frequency. The generator reactances, excitation system, and regulator response time are such that adequate voltage is provided to meet automatic loading requirements in accordance with AEC Safety Guide The electric power supply for field flashing will be taken from the

---

' respective station battery.

Sufficient electrical instrumentation is furnished to survey the variables required for successful operation of the excitation and voltage regulation system.

Electrical instrument power supplies will be 120V AC and 125V DC from redundant essential instrument power distribution panels.

Sufficient mechanical and electrical instrumentation is provided for each emergency diesel to survey the variables required for successful operation.

The systems monitored included the starting system, lubrication system, fuel system, cooling system, combustion air system and exhaust system.

Separation/Hazards:

Figure 3.6-3 indicated the physical arrangement of the diesel generators, fuel oil day tanks, and starting air system. Physical separation is provided to.

each diesel generator and its associated auxiliary systems.

The redundant emergency diesel generating units are located in separate, adjacent rooms in the Seismic Class I auxiliary building (also see Subsection 8.3.1.1.8). A fire wall and door are provided between the two rooms.

The local control and auxiliaries for each emergency diesel generating unit are located in the same room as the diesel with which they are associated.

8.3-l1b REV 20 12/96

Docket Number 50-346 License Number NPF-3 Serial Number 3006 COMMITMENT LIST THE FOLLOWING LIST IDENTIFIES THOSE ACTIONS COMMITTED TO BY THE DAVIS-BESSE NUCLEAR POWER STATION (DBNPS) IN THIS DOCUMENT. ANY OTHER ACTIONS DISCUSSED IN THE SUBMITTAL REPRESENT INTENDED OR PLANNED ACTIONS BY THE DBNPS. THEY ARE DESCRIBED ONLY FOR INFORMATION AND ARE NOT REGULATORY COMMITMENTS. PLEASE NOTIFY THE MANAGER - REGULATORY AFFAIRS (419-321-8450) AT THE DBNPS OF ANY QUESTIONS REGARDING THIS DOCUMENT OR ANY ASSOCIATED REGULATORY COMMITMENTS.

COMMITMENTS DUE DATE None N/A