ML19305D987

Proposed Changes to Tech Specs 3.1.2.4,4.1.2.3.6.5.9 & 4.6. 5.9,consisting of Correction to Parameter Test for Divider Barrier Seal & Typing Correction

ML19305D987
Person / Time
Site:	Sequoyah
Issue date:	04/14/1980
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML19305D984	List: ML19305D983 ML19305D987
References
NUDOCS 8004170073
Download: ML19305D987 (6)

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ENCLOSURE 1 PROPOSED C !A;;GES TO SEQUOY/dl 2:UCLEAR PLu;T U: LIT 1 TEClfNICAL SPECIFICATIONS i

800#74- ( 1

.,. e-REACTIVITY CONTROL: SYSTEMS .

CHARGING PUMPS - OPERATING

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LIMITING CONDITION FOR OPERATION i

3.1. .' . 4 At least two cnarging pumps shall be OPERABLE.

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

With only one charging pump OPERABLE, restore at least two charging pumps.to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STANOBY and borated to a

5HUTD0'..N MARGIN ecuivalent to at least 1% delta k/k at 200 F .ithin the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />; restore at least two charging pumps to OPERABLE status within the next 7 days or be in COLD SHUTDOWN within the next-30 hours.

i SURVE*LLANCE REOUIREMENTS 4.1.2.4 At least two charging pumps shall be demonstrated OPERABLE by verifying, that on recirculation flow, each pump develops.a discharge pressure of greater than or equal to 2400 psig when tested pursuant to Specification 4.0.5.

9 SE000YAH~- UNIT 1- -

3/4 1-10.

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w CONTAINMENT SYSTEMS DIVIDER BARRIER SEAL LIMITINUCONDITIONFOROPERATION -

3.6.5.9 The divider barrier seal shall be OPERABLE.

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APPLIC?SIL:TY: MCDES i, 2, 3 and 4.

ACTICN:

With the divider barrier seal inoperable, restore the seal.to OPERABLE stat'us prior to increasing the Reactor-Coolant System temperature above'200*F.

SURVEILLANCE RE0VIREi1ENTS 4.6.5.9 lhe divider barrier seal shall be determined OPERABLE at least once per 18 months during shutdown by:

a. Removing two divider barrier seal test coupons and' verifying that

-2.a properties cf the test ccupens are within the accentable rance of the values shcwn in Table 3.6-3.

b. Visually inspecting at least 95 percent of the seal's entire length and:

1. Verifying that the seal and seal-mounting bolts are properly installed, and

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2. Verifying that the seal material shows 'no visual evidence of deterioration due to holes, ruptures, . chemical attack, abrasion,

radiation damage, or changes in physical ~ appearances. .

SE000YAH-- UNIT ~1 3/4-6-36i r-

m TABLE 3.6-3 '

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-8 DIVIDER BARRIFR SEAL

,d . ACCEPTABLE P.l.iY.SICAL PROP [RTIES

. Dif ferential Material Pressure Elongation

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Presray' Corp. EPDM Ccmpound'E603 15 paid . tlA --

(2 ply Dacron Coated EPDM)

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ENCLOSygg g REASONS AliD JUSTIFICATIONS FOR PROPOSED CHANGES TO SEQUOYAH NUCLEAR PLUT UNIT 1 TECliNICAL SPECIFICATIONS e

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1. Specification 3'.1.2.'4 Page 3/4 1 The crosshatch' footnote was removed from the applicability state-

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ments since no footnote exists.

2. Specification 3.6.59, Page 3/4 6-36 Surveillance requirement 4.6.5.9.a.was rewritten to.-reflect the fact that a differential pressure test will be performed as opposed to a tensile test.

3. Table 3.6-3 Page 3/4 6-37 The table was modified to require a differential pressure test-rather than a tensile test. The divider barrier sealiprevents the flow of steam during an accident from the lower compartment to the upper compartment in the space between the ice condenser and the containment wall. To do so, the seals.must withstand a dif-ferential pressure (15 psid maximum) during the blowdown phase of an accident. The proposed technical specification change will. ' '

permit samples of_the material to be tested directly for their ability to withstand the differential pressure'. This test will eliminate any errors in correlating tensile strength with differen-tial pressure. Sequoyah' Nuclear Plant has developed a test rig to perform the differential pressure test. This change is needed

before entering MODE 4 on April 21,'1980.

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