ML20135D685

Proposed Tech Specs 3.1.3.5, CR Scram Accumulators, for Improvement & Clarifies Statement of 961025 Initial Request

ML20135D685
Person / Time
Site:	Hope Creek
Issue date:	12/04/1996
From:	Public Service Enterprise Group
To:
Shared Package
ML20135D652	List: ML20135D650 ML20135D685
References
NUDOCS 9612100092
Download: ML20135D685 (3)

Text

y ..:.

. .I REACTIVITY CONTROL SYSTEMS

' LIMITING CONDITION FOR OPERATION (Continued)

ACTION (Continued)

]

3. With one or more control rod scram accumulators -

! inoperable and reactor pressure < 900 psig, l

a) Immediately upon discovery of charging water I header pressure < 940 psig, verify all l control rods associated with inoperable accumulators are fully inserted otherwise place the mode switch in the shutdown i position **, and l

b) Within one hour, declare the associate l control rod (s) inoperable.

Otherwise, be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. l

b. In OPERATIONAL CONDITION 5* ,

1. With one or more withdrawn control rods j inoperable, upon discovery immediately initiate j j

action to fully insert inoperable withdrawn l control rods.

l

c. The provisions of Specification 3.0.4 ;re not applicable. I i

SURVEILLANCE REOUIREMENTS

)

4.1.3.5 Each control rod scram accumulator shall he determined i OPERABLE: l l a. At least once per 7 days by verifying that the l indicated pressure is greater than or equal to 940 psig unless the control rod is inserted and disarmed or scrammed.

t l

l '

' At least the accumulator associated with each withdrawn control l rod. Not applicable to control rods removed per Specification 3.9.10.1 or 3.9.10.2.

• • Not applicable if all inoperable control rod scram accumulators are associated with fully inserted control rods.

HOPE CREEK . 3/4 1-10/ / Amendment No.

9612100092 961204 PDR ADOCK 05000354 p PDR 1

l _-

i 1

1 4 .

1 4

1 A'hTACHMENT C r I

1 1

i 1

1 I

4 l

1 i

l l

I I

F

l Document Control Desk LR-N96206 L

Attachment 1 LCR H96-08 }

l With the reactor pressure < 900 psig, the function of the accumulators in providing the scram force becomes much more important since the scram function could become degraded during a j depressurization event or at low reactor pressures. Therefore, l immediately upon discovery of charging water pressure < 940 psig, concurrent with one or more inoperable control-rod scram accumulators, and reactor pressure < 900 psig, all control rods i ' associated with inoperable accumulators must be verified to be fully inserted. The associated control rods must also be declared inoperable within one hour. As stated in the improved Technical Specification allowed completion time of one hour is reasonable considering the low probability of a DBA or transient

occurring during the time that the accumulator is inoperable.

i The proposed changes also state that the reactor mode switch must l

be immediately placed in the shutdown position if either required action and associated completion time associated with loss of the CRD charging pump cannot be met. This ensures that all insertable control rods are inserted and that the reactor is in a i condition that does not require the active function (i.e. scram) l of the control. rods. This required action is modified by a note l stating that the action is not applicable provided all control rods associated with the inoperable scram accumulators are fully inserted, since the safety function of the control rod (s) has been performed.

The proposed Technical Specifications will also be revised to state that, during OPCON 5 with an accumulator associated with a withdrawn control red inoperable, the control rod is required to be inserted.

"In OPERATIONAL CONDITION 5*:

1) With one or more control rods inoperable, upon discovery immediately initiate action to fully insert inoperable withdrawn control rods."

l )

Once the control rod is fully inserted, the accumulator is no j longer required to be operable (as indicated in a footnote in the '

current Technical Specifications) and the entry conditions for

! the required actions are no longer applicable, thus no additional actions are required (this is consistent with LCO 3.0.2).

Therefore, the action to disarm the associated directional control valves is proposed for deletion.

Multiple control rods withdrawn with the vessel head removed (OPCON 5) while fuel remains in its cell is only accomplished in accordance with Technical Specification section 3.10.3. In the event multiple withdrawn control rods have inoperable accumulators and no CRD pump operating, the actions of LCO 3.10.3 will direct the immediate scram. -Actions for single or multiple

! withdrawn control rods with inoperable accumulators, and CRD pump '

+

i Page 5 of 7 l

! __