ML050210105
| ML050210105 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  (DPR-064) |
| Issue date: | 01/19/2005 |
| From: | NRC/NRR/DLPM |
| To: | |
| References | |
| TAC MC4991 | |
| Download: ML050210105 (2) | |
Text
CRVS 3.7.11 3.7 PLANT SYSTEMS 3.7.11 Control Room Ventilation System (CRVS)
LCO 3.7.11 APPLICABILITY:
Two CRVS trains shall be OPERABLE.
MODES 1. 2. 3. 4.
ACTIONS_
CONDITION REQUIRED ACTION COMPLETION TIME A. One CRVS train A.1 Restore CRVS train to 7 days inoperable.
OPERABLE status.
B. Two CRVS trains B.1 Restore one CRVS train 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> inoperable.
to OPERABLE status.
C. Required Action and C.1 Be in MODE 3.
6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion Time of Condition A or B S
not met.
C.2 Be in MODE 5.
36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> I
I
- This Completion Time is extended to 14 days on a one-time only basis to permit tracer gas testing. This applies to tracer gas testing only and is for no other purpose.
INDIAN POINT 3 3.7.11-1 Amendment No.
223
CRVS B 3.7.11 BASES APPLICABLE SAFETY ANALYSES (continued)
Each of the automatic dampers that are common to both trains is positioned in the fail-safe position (open or closed) by either of the redundant actuation channels.
The CRVS satisfies criterion 3 of 10 CFR 50.36.
LCO Two CRVS trains are required to be OPERABLE to ensure that at least one is available. Total system failure could result in exceeding a dose of 5 rem whole body or 30 rem to the thyroid of the control room operator in the event of a large radioactive release.
The CRVS is considered OPERABLE when the individual components necessary to limit operator exposure are OPERABLE in both trains. A CRVS train is OPERABLE when the associated:
- a. Filter booster fan and an air-conditioning unit fan powered from the same safeguards power train are OPERABLE;
- b. HEPA filters and charcoal adsorbers are not excessively restricting flow, and are capable of performing their filtration functions; and
- c. Ductwork, valves, and dampers are OPERABLE or in the incident mode, and air circulation can be maintained.
In addition, the control room boundary must be maintained, including the integrity of the walls, floors, ceilings, ductwork, and access doors.
In the event that tracer gas testing identifies unfiltered inleakage in excess of limits established in applicable dose consequence analyses, SCBA and KI pills may be implemented as compensatory measures as long as an evaluation concludes that the operator dose limits of GDC-19 continue to be met.
Instrumentation for toxic gas monitoring is governed by the IP3 Technical Requirements Manual (TRM)
( Ref. 4) and is not included in the LCO.
Note that the required recirculation rates are demonstrated with surveillance tests conducted with the air conditioning system (CRACS) operating.
An inoperable CRACS fan will affect the flow (continued)
INDIAN POINT 3 B 3. 7. 11 -
5