ML20072T052

Proposed Tech Specs Modification to Append a of Operating License DPR-35 Re Maintenance of Filled Discharge Pipe

ML20072T052
Person / Time
Site:	Pilgrim
Issue date:	09/06/1994
From:	BOSTON EDISON CO.
To:
Shared Package
ML20072T051	List: BECO-94-098, Application for Amend to License DPR-35,requesting Change to Reflect Standard TSs Re Maintenance of Filled Discharge Pipe ML20072T052
References
NUDOCS 9409150041
Download: ML20072T052 (5)

Text

l

' LIMITING CONDITION FOR OPERATION SURVEILLANCE RE0UTREMENT 4.5.H Maintenance of Filled Discharae Pipe (Cont'd) 3.

Whenever the HPCI or RCIC system is lined up to take suction from the torus, the discharge piping of the HPCI l

and RCIC shall be vented from the high point of the system and water flow observed on a monthly basis.

9409150041 940906 PDR ADOCK 0500r 3

Amendment No. 39, 135 112

BASES:

3.5.H Maintenance of Filled Discharae Pipe If the discharge piping of the core spray, LPCI system, HPCI, and RCIC are not filled, a water hammer can develop in this piping when the pump and/or pumps are started. An analysis has been done which shows that if a water hammer were to occur at the time at which the system were required, the system would still perform its design function.

However, to minimize damage to the discharge piping and to ensure added margin in the operation of these systems, this Technical Specification requires the discharge lines to be filled whenever the system is in an operable condition.

An acceptable method of ensuring that the discharge lines are full is to i

vent them at their high points. The monthly frequency is based on the gradual nature of void buildup in the ECCS piping, the procedural controls, and operating experience.

j i

i f

J l

i 1

I i

i 4

1 Amendment No. 135 121

Attachment C to BECo Letter 94-098 Marked up Technical Specification Pages i

t i

l i

I I

l l

l 1

i

LIMITING CONDITION FOR OPERATION SURVEILLANCE REOUIREMENT e

4.5.H Maintenance of Filled Discharae Pine (Cont'd) 3.

Whenever the NPCI or RCIC system is lined up to take suction from the torus, the discharge piping of the HPCI and RCIC shall be vented i

from the high point _of the system l

and water-flow observed on a monthly basis.

n witches Atch-mnnitnr the ditcharae lines to

- ansere that_thay-ara MLshaM-be-

_ functionally tested-every-month i

1 and calibrated every three-months, i -

\\

1 i -

i i

i 1

i i

1 I

i 1

1 I

i f

I l

t i

l 6

112

s BASES:

l

'3.5.H Maintenance of Filled Discharae Pine If the discharge piping of the core spray, LPCI system, HPCI, and RCIC are not

'l j

filled, a water hammer can develop in this piping when the pump and/or pumps are started. An analysis has been done which-shows that if a water hammer were to occur at the time at which the system were required, the system would i

still perform its design function.

However, to minimize damage to the discharge piping and to ensure added margin in the operation of these systems, j

this Technical Specification requires the discharge lines to be filled whenever the system is in an operable condition.

M MapCAA4 odc

.a-ww1A dd0 Oc W y & C A cf c4 Lf W.17u sqq_

m M~ rte yMn~caugn'cfRy h Ms&q, tk paLJng4 a

• W gN S,

4 4

ION 454 Ame3mWN.@3 W