ML030780077
| ML030780077 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 10/29/2002 |
| From: | Nuclear Management Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2003-0094 | |
| Download: ML030780077 (2) | |
Text
pAr I fl' FACSIMILE of NRC FORM 361 U.S. NUCLEAR REGULATORY COMMISSION (12-2000) OPERATIONS CENTER Point Beach Nuclear Plant EVENT NOTIFICATION WORKSHEET EN#
NRC OPERATION TELEPHONE NUMBER: PRIMARY - 301-816-5100 or 800-532-3469, BACKUPS-- [1st] 301-951-0550 or 800-449-3694%
[2"] 301-415-0550 and 13d*d301-415-0553 *Licensees who maintain their own ETS are provided these telephone numbers.
NOTIFICATION TIME POINT BEACH UNIT I NAME OF CALLER CALL BACK #
NUCLEAR PLANT 1 &2 1 EVENT TIME & ZONE EVENT DATE POWERIMODE BEFORE POWERIMODE AFTER 1025 CST 10/29/2002 100% / Mode 1 100% / Mode 1 EVENT CLASSIFICATIONS I-Hr. Non-Emergency 10 CFR 50.72(b)(1) (v)(A) Safe S/D Capability AINA GENERAL EMERGENCY GENJAAEC TS Deviation ADEV (v)(B) RHR Capability AINB SITE AREA EMERGENCY SIT/AAEC 4-Hr. Non-Emergency 10 CFR 50.72(b)(2) (v)(C) Control of Rad Release AINC ALERT ALE/AAEC (i) TS Required S/D ASHU X (v)(D) Accident Mitigation AIND UNUSUAL EVENT UNU/AAEC (iv)(A) ECCS Discharge to RCS ACCS (xii) Offsite Medical AMED 50 72 NON-EMERGENCY (see next columns) (iv)(B) RPS Actuation (scram) ARPS (xiii) Loss Comm/Asmt/Resp ACOM PHYSICAL SECURITY (73 71) DDDD (xi Offsite Nolificabon APRE 60-Day Optional 10 CFR 50.73(a)(1)
- .. ~~. - .- -O FR 0 2(b(3 MATERIAL/EXPOSURE 6??? 8-Hr. Non-Emergency 1CFR50.72(b)(3) Invalid Specified System Actuation AINV FITNESS FOR DUTY HFIT (i0(A) Degraded Condition ADEG Other Unspecified Requirement (Identify)
OTHER UNSPECIFIED REOMT. (see last column) Cii(B) Unanalyzed Condition AUNA NONR INFORMATION ONLY NNF v)(A) Specified System Actuaton AESF NONR DESCRIPTION Include Systems affected. actuations and their Initiating signals, causes, effect of event on plant, actions taken or planned. etc. (Continued on back)
Reviewed by Tlm*
Time At 10:27AM CST, the auxiliary feed water system (AFWS) for the Point Beach Nuclear Plant, Units I and 2, was declared inoperable due to the potential for fouling of the minimum recirculation orifices for each of the four AFW pumps. The mechanism identified was the potential for foreign materials in the AFW fluid restricting adequate flow through the flow control orifices in the recirculation line. Under such conditions, it is possible that if the discharge valves for the AFW pumps are throttled, adequate flow may be unavailable through the recirculation line and pump damage could occur.
The potential for this common failure mode was realized while conducting an extent of condition evaluation for reduced recirculation flow observed during surveillance testing of the P-38A motor driven AFW pump on October 24, 2002. The flow was less than expected but above the minimum required for pump operability. Upon disassembly of the P-38A flow orifice we discovered a build up of corrosion products in the orifice.
Both units entered TSAC 3.7.5.E and required action 3.7.5.E11 which requires immediate steps to restore an AFWS to operable status. Immediate corrective actions have consisted of briefing the on-shift (on-coming crews will also be briefed) of the potential consequences of restricted recirculation flow and directing the operators, in the event of a situation requiring AFW flow, to secure a running AFW pump if the pump discharge falls below minimum flow requirements. In addition, information tags have been attached by the AFW pump flow indicators on the main control boards to convey that information. These actions were completed at 1305 CST. At that time, with these administrative controls in place, we declared the AFWS back in service. Longer term corrective actions, including permanent procedure changes, are being evaluated.
NOTIFICATIONS YES NO WILL BE ANYTHING UNUSUAL OR NRC RESIDENT X NOT UNDERSTOOD? D YES (Explain above) X NO STATE(s) X DID ALL SYSTEMS LOCAL -OCAL-X FUNCTION AS REQUIRED?
X YES D NO (Explain above)
OTHER GOV OTHER GOV AGENCIES AGENCIES -
X X-UNTIL MODE CORRECTED, OF OPERATION ESTIMATED RESTART DATE. ADDITIONAL INFO ON BACK Y XNO MEDIA/PRESS RELEASE X Mode 1 NA Y PBF-1646 Revision 1 01/25/01 R1ý6ý
ADDITIONAL INFORMATION
- PAt*5F9=2 PA6E20F2 m.rnn, n,,ine, DCI recta. rLZmPW floe... ILl ACCi ifAOi C iTCMC t..,.ifl.. Aeflhleiswnlnstcnn ehn.frthc rnuaratt in the event decrflnflnnl LIQUID RELEASE GASEOUS RELEASE UNPLANNED RELEASE PLANNED RELEASE ONGOING TERMINATED MONITORED UNMONITORED OFFSITE RELEASE T S EXCEEDED RM ALARMS AREAS EVACUATED PERSONNEL EXPOSED OR CONTAMINATED OFFSITE PROTECTIVE ACTIONS RECOMMENDED
- State release path in descanpbon Release Rate (CUsec) % T. S. Umit HOO GUIDE Total Activity (CI) % T. S. Umit HOO GUIDE Noble Gas 0 1 Cilsec 1000 Ci Iodine 10 uCtIsec 001 CI Particulate 1 uCifsec I mCi Liquid (excluding tritium 10 uCilmin 0.1 CI and dissofved noble gases)
Uguld (tritium) 0.2 C0min 5 CI Total Activity PLANT STACK CONDENSERIAIR EJECTOR MAIN STEAM UNE SG BLOWDOWN OTHER RAD MONITOR READINGS ALARM SETPOINTS
% T. S. LIMIT (ifapp/icable)
RCS OR SG TUBE LEAKS: CHECK OR FILL IN APPLICABLE ITEMS: (specific detallslexplanationsshould be covered In event description)
LOCATION OF THE LEAK(e.g., SG A vaveA,pip*, etcj LEAK Rate UNITS: gpmlgpd T. S. LIMITS SUDDEN OR LONG-TERM DEVELOPMENT LE.AK STAT DATE TiME COOULANI AC I S PYl
- rIMRYtT AND tINIS-LIST OF SAFETY RELATED EQUIPMENT NOT OPERATIONAL EVENT DESCRIPTION (Continued fromn front)
PBF-1646 Revision 1 01/25/01