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Systems > TIPS > Flashcards

TIPS Flashcards

1
Q

What is the Purpose of the TIP system?

A

To Measure and record axial neutron flux profile at 41 locations to calibrate LPRMs

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2
Q

How often are TIP traces REQUIRED to be performed?

A

Every 2000 hours

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3
Q

How many TIP Units are there?

A

5 Identical

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4
Q

What is the power Source for the TIP Motors?

A

MCC 29-1(38-1)

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5
Q

How is the location of the TIP detector monitored?

A

Counter tracks the distance of the TIP from the shield to the top of the core. 00 is 2 feet behind the indexer
Fed from a “VEEDER ROOT” counter chain
Other values for “in shield chamber”, reverse safety stop, and core points are unique for each TIP manchine and Indicator Route to Core

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6
Q

What speeds does the TIP Drive have?

A

High and Low
Hi - 60ft/sec
Slow - 7.5ft/min

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7
Q

What is the Drive Mechanism purged with and why?

A

Purged with IA to prevent lubricant breakdown and corrosion of helical wrap

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8
Q

Where is the TIP Hi Speed used? Lo?

A

Fast - Index to Core Bottom

Slow - SHield to Index & Core Bottom to TOp

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9
Q

What is the purpose of the TIP Shield Chamber and where is it?

A

Protects personnel from irradiated detector - located in TIP ROOM

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10
Q

What is the TIP Shear Valve?

A

Provides Emergency means of sealing TIP Guide Tube if dry tube should leak or TIP is stuck.

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11
Q

How does the TIP shear valve operate?

A

Two primers and two firing circuites are used and powered from 125vDC TB Bus 2A-1(3A-1) - both monitored by ONE indicating light

CAN ONLY BE MANUALLY OPERATED BY KEY SWITCH - only needed if Ball Valve CANNOT isolate on Group 2

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12
Q

How CR indication exists for the TIP Shear Valve?

A

Both firing circuites monitored by one light -

If squib fires or fault occurs - amber light

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13
Q

What is the normal position and motive force for the TIP Ball Valve?

A

Normally shut except during TIP runs.
Powered from 29-1(38-1)
THIS IS A PCIV

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14
Q

What interlock exists for the TIP Ball Valve?

A

If not FULL OPEN 5 seconds from the time detector leaves chamger, the drive mechanism will de-energize

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15
Q

What is the purpose of the TIP Index Mechanism? Where is is located?

A

Located in the DW - used to ensure detector is routed to in core position selected by Operator
Provides precise coupling between movable guide tube and any one of the 9 guide tubes that leade to in core position

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16
Q

Where is TIP Position 0001?

A

2 feet behind Indexer

17
Q

What is the Indexer position 10 for ALL indexers?

A

Center core - location 32-33 - used as accuracy checks of TIPS
INTERLOCK so that only 1 can be at position 10 at any given time

18
Q

How is corrosion prevented in Indexer and Detector?

A

Indexers are purged with Nitrogen from Pumpback system to maintain relatively low humidity to prevetn corrosion and mainatin indexer and guide tubes at 2psig above DW pressure.

19
Q

How does Indexer respond to >5psig DW pressure?

A

Internal blowout valve opens to decrease pressure

20
Q

What is the DW 4 way connector?

A

Provides path from 5 indexers to common core position 32-33 position (10).
Indexer A,B,C go to 4-way 1.
4 way 1 goes to 4-way 2 along with Indiexer D&E

21
Q

What interlocks exist for TIPS?

A

Upon receipt of group II isolation, any TIP detector not in its shield is automatically reversed. When in shield, ball valve closes, circuit light extinguishes and is sealed in.

22
Q

What does Group II Isolation do to TIP? How is reset?

A

Upon receipt of Group II isolation, any TIP detector not in shield is transferred automatically to manual revers mode.
When in shield, ball valve closes - MCR light goes out and seals in
Grp 2 can be reset from front panel when clears, then TIPS can be reset on back panel (902-13)

23
Q

What happens to TIPs on lose of MCC 29-1(38-1)?

A

Loss of Motor Drive Mechanism - Loss of Ball Valve

24
Q

What happens with Loss of 125vdc 2A-1 (3A-1)?

A

Shear Valve will not operate

all indication would be lost and purge system isolated?

25
Q

What happens with failure of ball valve to isolate on Group II Isolation?

A

INCOMPLETE GRP II - SHEAR VALVE NEEDS TO BE FIRED MANUALLY from MCR

26
Q

What is the TIP Squib indication?

A

Squib monitor light “ON” indicates squib cirucit continuity lost - EITHER SQUIB circuit open or squibs fired

27
Q

What is the Shear valve indication light?

A

If on - indicates shear valve has actuated and indicating link has broken the monitoring circuitry

28
Q

What is the TIP Ball Valve Indication?

A

Drive Control Unit - one for each TIP machine - dimly lit means Ball valve closed - BRIGHT indicates ball valve open
Vavle control unit - one for each TIP machine - light stating OPEN or CLOSED

29
Q

What happens on loss of TIP?

A

Inability to calibrate LPRM and APRMs - Tech Spec Entry and possible Half or Full Reactor Scram

Systems (97 decks)

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