ML20032B136
| ML20032B136 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 05/31/1981 |
| From: | Wade W EG&G, INC. |
| To: | |
| Shared Package | |
| ML20032B129 | List: |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.E.4.2, TASK-TM SRO-242, NUDOCS 8111040585 | |
| Download: ML20032B136 (5) | |
Text
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enorcy uoosuremento crau, son acmsn coerco:na May 1931 TECHNICAL EVALUATION OF THE RESPONSE TO PbSITION NO.5 OF ITEM H. E. 4.2 OF NUREG-0737 CONTAINMENT ISOLATION SETPOINT FOR THE
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CALVERT CLIFFS 4
NUCLEAR POWER PLANT
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UNITS 1 AND 2 I~~
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.(DOCK ET.N es.SC-317 an d 50-318) _.
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INTRODUCTION AND SACKGROUND 2
As a consequence of ne incident at TMI-2, imolementation of a y,
. number of new requirements has been rec mmended for operating reac:crs.
These new requirements are described in NUREG-0660, "NRC Action Plan Devel-3 oped as a Result of the TMI-2 Accident," May 1980, and NURiG-0737, "Clari-fication of TMI Action Pl an. Requirements," _Novemoer _1980.....Th'e NRC staff Hs ~also requested licensees.to suemit infor=ation sufficien.t to permit.an_
Tndipendent evaluati.on of tne.f r response to :nese new requirements.
Tnis report provides an evaluation of the response to Action Plan Item II.E.4.2, peption5,eythedesigna:edlicensee.
DESIGN SASIS UR REVIEW CRITERIA
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Position 5 requires nat tne containment pressure se: point tna:
r initia:es containment isolation for non-essential system containment vessel
' penetrations ce at, or reduced to, "...:ne minimum compaticle witn nnr. Sal operating condition's.'
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IEG*r[NICAL EVALUATION
' Respan.se evaluatien7is based upon the vilues proviced for One t.
foilowing parameters:
-(1) tThe -maximum ct'secved or.: expected cont $inment press'ure!'.
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... during.ncroal. oper.atic~n.: :.n (2)
Tne Icop errer and coserved drift in :ne pressure sensing instrumentatien previcing tne isolatica signal-1 (see note).
(3)
The ::ntainmen; is:'.a:i:n pressure se ::cin:.
J NOTE: The ilarifica-icn d:cumen: (NUREG-0737) provicec only,
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- ne expec:ec margin for ins:rumen: error and cid no:
i s::eci fy ac:e::asie values f:r instrumen drif: cc l
a:mes::neric cnanges contricu ing to :ne :: al sansing 10cc error.
.accitional s aff guidance es a::lisnec a limit of 3.0 psi fer an isola:icn se::cin; margin over One ncrmai c ntainment pressure to ac: un: for :c:al loop error.-.In addit. ion, for suna:mesoneric contain-
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ments,. a 3.0 psi set::cint margin.over atmosoneric pressure is also c:nsidered ac:ep aole.
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In considera:icn of nese values, One isolation pressure setpoint is to be as icw at practical witncut increasing tne prcoasility of inadver-tan; activa:icn of ne isolation signal.
1 CONC 1.USIONS The le er of Oe: ember 30, 1980 su:mi.:ed oy Saltimore Gas and
. Electric Com:any, orovicec sufficien-information to ::ncluce na:
ne 0:ntai. ment isola:icn pressure se::oint for Calver: Cliffs Nuclear P:wer Plan:, uni s 1, anc 2, meets ne NURE3-0660/0737 requirements and is wi nin na ac:itional limi.ing guidelines ;revicec ey :ne NRC staff.
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ENCLOSURE 7 Technical Specifications Addressing Item II.E.4.2' CONTAINMENT SYSTEMS
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LIMITING CONDITION FOR OPERATION The containment purge supply and exhaust isolation valves may 3.6.1.7 be cpen for safety-related reasons [or shall be locked closed).
The containment vent line isolation valves may be open for. safety-related r'eisons [or shall be locked closed).
APPLICA3ILITYi ' MODES 1, 2', 3, and 4.
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ACTION:
hi l specification)
, (For plants with valves closed by tec n ca
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, $ one containment purge supply and/or ene exhaust isolation valve Wi t.
open ;close -the cpen' valve (s):Within one hour or.be in at least. HOT-STAND 3Y,',within th6 next.5 bcurstand in COLD SHUTDOWN withi.S the}fol, lowi
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30; hours:
(Feb clants with valves.that: cay be cpened;by_ technical. specifications)
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.: ;.:: :: a With one..containmen; purge supply add /or c.no exhaust isolation cr vent r
' ' valve ino6 arable, close-the associated CPERA3LE valve and eitner : restore 1i C. the in0:erable. valve to.0PERA3LE s*.atus within 72-hcurs er lock the
- OPERA 3LE valve-closed.
Operati:n -*ynen continue until :erf:rmance cf the next requiredrevi 2.
vaive :es:
c'esed at least once per 31 days.
i 0:neraise, de in at least HOT STA;C3Y within the next six hcurs and 3.
i, 0L? 5HUTDCWN wi:nin the folicwing 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
The previsions of Specification 3.0.4 are not applicable.
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SUR9EILLANCE RECUIREMENTS
-inch containment purge supply and. exhaust isolation valves
-ini5 vent line isolation valves shall be determined locked close The 4.5.1.7.1 and the at least ence per 31 days.
The valve seals of the purge supply and exhaust isolation ';alves and the vent line isolation valves shall be replaced at least one per __, years.
4.5.1.7.2 3/4 6-10
CONTAINMENT SYSTEMS I
3/4 4.6.3 CONTdINMENT ISOLATION VALVES e
LIMITING CONDITION FOR OPERATION
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y 3.6.3 The' containment isolation valves spn'cified'in Table 3.6-1.shall be OPERABLE with ' isolation times as shown in Table 3.6-1.
APPLICAkILITY: MODES 1,2,3and'$.
ACTION:
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With one or more of the isolation valves (s) specified in Table 3.6-1 inoperable, maintain at least one isolation-valve OPERA 3,E in each affected penetration L
that is open and either:
s, Restore the inoperable valve (s) to OPERABLE status within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> a.
or Isolate each affected p'enetration within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> by use of at least b.
one deactivated automatic valve secu' red.in the isolation position, or Isolate each affected penetration within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> by use of at least c.
one closed manual valve or blind flange; or Be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD d.
SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SURVEILLANCE REQUIREMENTS The i. solation valves specified in Table 3.6-1 shall be demonstated OPERABLE prior to returning the valve to service after maintenance, repair or 4.6.3.1 replacement work is performed on the. valve or its associated actuator, c or power circuit by performance of a cycling test, and verification of isola -
tion time.
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SURVEILLANCE REOUIREMENTS (Continued) 4.6.3.2 Each isolation valve specified in Table 3.6-1 shall be demonstrated
,,0PERABLE during the COLD SHUTDOWN or REFUELING MODE at least once per 18 months by:
Verifying that on a Phase A containment. isolation test signal, each a.
Phase A isolation valve actuates to its isolation position.
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Verifying that on a Phase B containment isolation test signal, each Phase B isolation valve actuates to its isolation position.
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4.6.3.3 The iso 1ation time of each power operated or automatic valyc of Table 3.6-1 snall be determined to be within its limit when tested pursuant to Specification 4.0.5.
4.6.3.4 (The containment purge and vent isolation valves shall be demonstated-OPERABLE at intervals not to exceed months. Valve OPERASILITY shall be
~ determined by verifying that when the measuued leakage' rate is added to the leakage rates determined pursuant to Specification 4.6.1.2.d for all other Type B and C penetration, the combined leakage rate is less than or equal to 0.60La.
However, the leakage rate for the containment purge and vent isolation valves shall be compared to the previously measured leakage rate to detect ex;essive valve degradation.
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