ML18011A970
| ML18011A970 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 07/31/1995 |
| From: | CAROLINA POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML18011A969 | List: |
| References | |
| NUDOCS 9508040053 | |
| Download: ML18011A970 (3) | |
Text
/4 R
BASES The limitat1ons on r eact1vfty condftfons dur1ng REFUELING ensure that:
(1) the reactor will remafn subcrftfcal during CORE ALTERATIONS, and (2) a uniform boron concentratfon 1s ma1ntained for reactfvfty control fn the water volume hav1ng direct access to the reactor vessel.
These lfmftatfons are
. consistent with the 1nft1al condftfons assuled for the boron dflutfon 1ncfdent in the safety analyses and are speciffed 1n the cycle-specific COLR.
t administrative controls over the requ1red valves durfng refueling oneratfons precludes the possibility of uncontrolled boron dilution of the f11)ed por tion of the RCS.
Th1s actfon prevents flow to the RCS of unborated water by clos1ng flow paths froI sources of unborated water.
The OPERABILITY of the Source Range Neutron Flux Honftors ensures that r edundant monitoring capabi11ty 1s available to detect changes in the reactfv1ty condft1on of the core.
The requfreaents on contafnlent building penetratfon closure and OPERABILITY ensure that a release of radfoactfve eaterfal 'wfthfn contafnIent will be restricted froa leakage to the envfroreent;
. The OPERABILITY and closure r estr1ctfons are suff1cfent to restrfct r adfoactfve eaterfal release froi a fuel eleeent rupture based utNn thI lack of contafnlent pressurfzatfon potential wh11e fn the RERJELIlN3 NDE.
- DELETED The boron concentration limitspeci6ed in the COLR ensures that a core K,a of s 0.95 is maintained during fuel handling operations.
SHEARPN HARRIS - UNIT 1 8 3/4 9-1 9508040053 95073i PDR ADOCK 05000400 P
PDR l
3/4. 9 REFUELING TIONS BASES 3/4.9.1 BORON CONCENTRATION The limitations on reactivity conditions during REFUELING ensure that:
(1) the reactor will remain subcritical during CORE ALTERATIONS, and (2) a uniform boron concentration is maintained for reactivity control in the water volume having direct access to the reactor vessel.
These limitations are consistent with the initial conditions assumed for the boron dilution incident in the safety analyses and are specified in the cycle-specific COLR.
The boron concentration limit specified in the COLR ensures that a core K << of
< 0.95 is maintained during fuel handling operations.
The administra6ve controls over the required valves during refueling operations precludes the possibility of uncontrolled boron dilution 'of. the filled portion of the RCS.
This action prevents flow to the RCS of unborated water by closing flow paths from sources of unborated.water.
r 3/4.9.2 INSTRUMENTATION The OPERABILITY of the Source Range Neutron Flux Honitors ensures that redundant monitoring capability is available to detect changes in the reactivity condition of the core.
3/4.9.3 DECAY TIME -
DELETED 3/4.9.4 CONTAINMENT BUILDING PENETRATIONS The requirements on containment building penetration closure and OPERABILITY
'nsure that a release of radioactive material within containment will be restricted from leakage to the environment.
The OPERABILITY and closure restrictions are sufficient to restrict radioactive material release from a fuel element rupture based upon the lack of containment pressurization potential while in the REFUELING MODE.
3/4.9.5 COMMUNICATIONS -
DELETED SHEARON HARRIS
- UNIT 1 B 3/4 9-1 Amendment No.