ML19312B793

Proposed Tech Spec 3.1.6.4,changing Steam Generator Leak Rate Limit

ML19312B793
Person / Time
Site:	Oconee
Issue date:	07/17/1978
From:	DUKE POWER CO.
To:
Shared Package
ML19312B786	List: ML19312B785 ML19312B793
References
NUDOCS 7911190577
Download: ML19312B793 (1)

Text

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• 3.1.6 Leakaze

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S:ecifiestion D D -

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3.1.6.1 If the :ocal reac::: c clan: leakage ra:e exceeds 10 gp=, the rese::: shall be shu:down vi:hin 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of detec:icn.

3.1.6.2 If uniden:ified reac::: coolan: leakage (excluding nor=al evapora-tive losses) exceeds 1 gp: or if any reae::: coolant leakage is evalua:ed as unsafe, :he reae::: shall be shu:devn within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of de:ec:icn.

3.1.6.3 li any reac::: coolan: leakage exis:s :h:: ugh a acn-isolable faul:

• in a RCS s::eng:h boundary (such as the rese::: vessel, piping, valve body, e::., excep: the stea: genera::: :ubes), the react =:

shall be shu:devn, and cocidcu= :: :he : ld shu:dev= condi:ica s u..a., ., ue e _s ..a .a..,.... .a e< .u_a

.. n e i+ u..c u s c : 2e...<....

. . . . . . .

3.1.6.4 If reac:c ecolas: systa= leakage exceeds i g;= :h: ugh :he s:aa:

genera::: tubes, a reac::: shu:dev= shall be ini:ia:ed vi:hin 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and the reac::: shall be in a cold shutdev= condi:ic: vi hin

he nex: 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

3.1.6.3 If react: shu:de== is recuired by Specifica:icn 3.1.6.1, 3.1.6.2 c: 3.1.6.3, the rate of shu: deva and :he c =di: ices of shu:devn shall be de:er:1:ed bv. :he safe:7 evalua:1:n for each case and jus:1fied in vri:ing as seen thereaf:e: as prac:icable.

3.1.6.5 Actica :: evaluate the safe v i= plication of reac::: ecolant leakage <

shall be ini:ia:ed vi:hi: 4 h' ours of de:ection. The nature, as well )

as :he sagni:ude, of the leak shall be considered in :his evalua:1:n.

The safety evaluation shall assure :ha: :he ex;csure of offsi:e personnel :: radia:1ca is vi:hin :he guidelines of ICC7220.

l 3.1.6.7 If reac::: shu:devn is recuired per specif1:a:1:n 3.1.6.1, 3.1.6.2, 3.1.6.3 :: 3.1.6.4, :he reac::: shall =c: he res:arted un:11 :he leak is repaired :: un:il :he pr ble= is otherwise cc :ec:ed.

3.1.6.f hen :he reac::: is cri:ical and above 2." power, :2o reac::: : clan:

leak de:ec:ica sys:e=s of differen: epers:1:g principles sh ll be oc.e:able, vi:h one of the :ve sv.s:e=s sensi:ive :: radioactivi:v. .

The sys:e=s sensi:ive :: radica::1vi:7 =ay be cu:-of-service f :

43 hcurs pr vided two c:her neans := detec: leakage are cperable.

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3.1.6.9 Less of reae::: ccclan: through reac::: c clan: pu=p seals and systa= valves := c nnecting sys:e=s which ve : :: :he gas ve:: .

header and f := vhich c clas: can be returned :: :he reacter ceci-an: sys:e= shall ::: be censidered as reac::: :: clan.: leakage and

• shall ac t be subj ec: :: :he ::: sideration of Specifica:10:s 3.1.6.1, 3.1.6.2, 3.1.6.3, 3.1.6.4, 3.1.6.5, 3.1.6.6 c: 3.1.6.7 excep: :ha:

such lesses when added :: leakage shall ::: exceed 30 g;=.

3ases

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Every reasonable effer: vill be cade :: reduce reac::: c clan: leakage in-cluding eva;crz:ive losses (which =ay be en :he ::dar of .5 sp=) :: :he leves: ;cssible rate and a: leas: bel:v 1 g;= i.- order : preven; a large m .a