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30 Cards in this Set
- Front
- Back
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Which of the following statements best describes the structure of the containment walls? A. Prestressed, reinforced, concrete B. Conventional concrete supported by a steel liner.C. Conventional reinforced concreteD. Prestressed concrete with no reinforcement
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A
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Which of the following describes components of the Post Tensioning System for the containment structure? A. Tendons are housed in tendon ducts which have been pumped full of silicon sealant for protection.B. Hoop tendons are used in the "top hat" section and base slab tendons are tied to the vertical tendons.C. Inverted U-shaped tendons are arranged vertically and circumferential tendons lie horizontally.D. Two buttresses arranged 180 degrees apart provide the tie and tensioning points for hoop tendons.
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C
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The pressurizer physical load support is provided by: A. structural steel framing attached to the pressurizer housing supported by reactor vessel stanchions for vertical loading.B. the pressurizer support skirt which transfers the vertical and horizontal loads to the secondary shield wall via structural framing.C. the hot leg supports which provides the vertical load for the lower half of the pressurizer.D. 3 vertical steel supports which transfer vertical load to the base slab.
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B
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Any Containment penetration that is ___________ or is _________________ must have double isolation capability. A. electrical / pipingB. a Reactor Coolant Pressure Boundary / open to the Containment atmosphereC. not sealed with a Nitrogen seal / designed to allow personnel accessD. capable of opening to the Auxiliary Building / capable of opening directly to the atmosphere
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B
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The plant is in Mode 6, Steam Generators "A" and "C" are draining to Area 5 sump per SYS BM-201, STEAM GENERATOR DRAINING.* Neither S/G is open to Containment.* Containment Closure is required to move fuel.What is the minimum action regarding S/G draining required, if any, to establish Containment Closure? A. S/G "A" and "C" draining may continue provided Administrative Controls are established.B. S/G "A" and "C draining may continue, no action is required.C. S/G "A" and "C" draining may continue provided an Engineering evaluation is performed.D. S/G "A" and "C" draining must be terminated.
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B
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What is the design pressure limit of the containment building? A. 80 psigB. 27 psigC. 60 psigD. 17 psig
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C
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A main steam line break inside containment has occurred causing the containment pressure to increase to 20 psig.Which of the following containment isolation system will actuate to mitigate the pressure increase? A. SISB. MSLISC. CISAD. CISB
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B
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What situation is use of the auxiliary escape hatch NOT recommended? A. When the normal personnel hatch will not open and exit is needed due to injured personnel or adverse containment conditions.B. Normal containment hatch is inaccessible due to adverse conditions and exit is required.C. Normal containment hatch is accessible, but exit is more timely due to location of personnel during adverse conditions.D. During refueling operations for refueling crew relief, while containment integrity is required.
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D
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What is one of the requirements to meet Containment Integrity? A. Equipment Hatch closedB. RCS breaches closedC. S/G Tube leaks isolatedD. Containment Purge secured
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A
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The unit is in Hot Shutdown (Mode 4), containment air lock interlock mechanism for the personnel air lock is found not functioning properly and is declared inoperable at 1200 on July 1.The OPERABLE door is closed and verified locked at 1245.What date and time, including any extensions must the door be verified locked closed again without causing entry into a TS required shutdown? A. 1200 on August 1B. 0645 on August 9C. 1245 on August 1D. 1200 on August 8
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B
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In Mode 4 both containment airlock doors have been damaged in the personnel airlock. All other equipment in the plant in OPERABLE.At 1530 on 7/4, both airlock doors are declared inoperable. An evaluation determined overall containment leakage is 0.9 La. and the outer door is verified closed at 1600.What is required to open the outer door for the affected airlock? A. The containment must be declared inoperable and the ACTIONS of TS 3.6.1 must be entered.B. The airlock will be entered only to perform repairs on the interlock mechanism.C. The airlock will be entered only to access the containment to perform TS required surveillances.D. The unit must be placed into Mode 5 prior to opening the outer door.
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B
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On 5/1 at 1200 during review of the procedure that implements SR 3.6.3.3, one containment isolation valve was found inadvertently removed from the valve list during a previous procedure revision. The valve has not been verified closed in 12 months.SR 3.6.3.3 is performed and the valve is verified closed at 1400 on 5/2.If and when must TS Actions for TS 3.6.3 be entered and why? A. At 1200 on 5/2 because the additional time allowed testing the valve was exceeded.B. At 1200 on 5/1, because the specified surveillance interval was exceeded.C. The ACTIONS are not entered because the valve was demonstrated OPERABLE within the time period allowed by TS.D. At 2400 on 5/1, because the additional time allowed testing the valve was exceeded.
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A
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The station is operating at 100% power. An aircraft has crashed into the side of Containment. The Containment was not penetrated, but did suffer some structural damage. No other plant damage has occurred. About an hour after the accident, the senior structural engineer has notified you that based on his visual inspection, the containment now has a significant crack and one exposed tendon appears to be burned and partially broken. He states that the Containment would fail the visual surveillance. Repairs and surveillance testing could take many days or weeks.What action would the Shift Manager take for this condition? A. Instruct the structural engineer to document a visual surveillance, then wait for the Manager of Support Engineering to forward an engineering report declaring the Containment inoperable before any Tech Specs are entered.B. Wait for up to 4 hours for the structural visual surveillance and assessment to be completed. Start a plant shutdown to be in mode 3 within 6 hours and mode 5 within 24 hours.C. Perform an immediate shutdown to be in mode 4 within 6 hours and mode 5 within 24 hours.D. Plant shutdown would commence to be in Mode 3 in 6 hours and Mode 5 in 36 hours.
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D
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What is the purpose of the Containment spray system?
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Answer: 1-1 To withstand the pressures and temperatures of the DBA without exceeding design leakage rate.
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What federal regulation establishes the limits of dose to the public during accidents at nuclear facilities?
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Answer: 1-2: 10CFR100
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What is the purpose of the tendons?
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Answer: 2-1: To provide stress on the concrete used to construct containment, thereby strengthening it against increases in internal pressure.
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(T/F) The concrete is designed to be leak tight.
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Answer: 2-2: False, the steel liner forms the leak tight barrier.
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In general, what part of the containment system absorbs most vertical loads?
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Answer: 3-1: Reactor building base slab
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In general, what part of the containment system absorbs most lateral loads?
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Answer: 3-2: Shield walls
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Describe the primary shield wall.
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Answer: 4-1: Reinforced concrete cylinder. Extends from base slab to seal ring elev. Min. thickness 7 ft.
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Describe the function of the primary shield wall.
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Answer: 4-2: 1.Forms reactor cavity 2.Provides shielding 3.Provides support for major components
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Describe the secondary shield wall.
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Answer: 4-3: Reinforced 3.5 ft thick concrete anchored to RB base slab. Extends from base slab to elev. above top of SG tube bundle. Some portions of wall above operating floor are designed for removal.
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Complete the following design statements: o Large penetrations are provided in the primary shield wall for __________________________________________ o Portions of the secondary shield extend to elevation of top of SG tube bundle to ____________________________________________ o Removable sections of the secondary shield walls are keyed into the base slab at bottom of panel to ______________________________________ o Separation provided between floor slab and containment shell allows _________________________________________ o Plugs and removable hatches are provided in the operating floor for ________________________________________
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Answer: 4-4: Large penetrations are provided in the primary shield wall for ________ (Answer: primary loop piping and cavity ventilation) Portions of the secondary shield extend to elevation of top of SG tube bundle to _______ (Answer: shield the RCS) Removable sections of the secondary shield walls are keyed into the base slab at bottom of panel to _______ (Answer: prevent panels from becoming missiles during a seismic event.) ? Separation provided between floor slab and containment shell allows _______ (Answer: differential horizontal movement.) ? Plugs and removable hatches are provided in the operating floor for _______ (Answer: equipment removal)
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List three general classifications of containment penetration types and briefly describe each.
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Answer: 5-1: Reactor coolant pressure boundaries - part of reactor coolant pressure boundary, governed by 10CFR50, Appendix "A", Criterion 55 Primary containment isolation - connects directly to containment atmosphere, governed by 10CFR50, Appendix "A", Criterion 56 Closed systems - neither part of reactor coolant pressure boundary or connected directly to containment atmosphere, governed by 10CFR50, Appendix. A, Criterion 57
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State the isolation requirements for reactor coolant pressure boundaries that penetrate the containment.
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Answer: 5-2: a. Answer: One locked closed isolation valve inside and one locked closed isolation valve outside the containment; or b. One automatic isolation valve inside and one locked closed isolation valve outside the containment; or c. One locked closed isolation valve inside and one automatic isolation valve outside the containment. A simple check valve is not used as the automatic isolation valve outside the containment; or d. One automatic isolation valve inside and one automatic isolation valve outside the containment. A simple check valve is not used as the automatic isolation valve outside the containment; or e. Some other defined bases that meet the intent of containment isolation as an alternative to a through d above. A check valve vs. an automatic valve may be used inside containment but not outside of containment.
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Briefly describe the personnel access hatch door interlock.
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Answer: 6-1: The inner and outer doors are interlocked such that neither door can be opened unless the other door has been closed.
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Briefly describe the interlocks between access hatch doors and the quick acting pressurization valves.
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Answer: 6-2: The inner and outer door are interlocked such that neither door can be opened unless the other door has been closed and only one valve can be open at a time and then only when the opposite door is closed.
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Identify the actuating signal(s) and setpoint(s) for each of
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CISA:1. Manual 2SIS CISB:1.Manual 2.CNT pressure Hi-3 at 27 psig CPIS: 1.Containment atmosphere or purge process monitors2.CISA 3.Manual MSLIS:1 Low steam line pressure: 615 psig 2.High steam pressure rate: -100 psig/50 sec. 3.CTMT pressure, Hi-2: 17 psig FWIS:1.SIS 2.S/G water level high-high: 78.1% 3.S/G water level low-low: 23.5% 4.Reactor trip with Lo Tavg: 564 oF
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Assuming the normal containment personnel hatch is accessible, what conditions might require the use of the auxiliary escape hatch?
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Answer: 8-1:An emergency condition in which because of the location of personnel, exit via the escape hatch is more timely because of either rapidly developing adverse conditions in containment or serious injury.
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Where in containment is the auxiliary escape hatch located?
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Answer: 8-2: Northeast stairway just above 2000 foot elevation
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