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KAPS-1&2 were synchronized to grid on May 24, 2019 End shield (north) leak rectification work was also
& September 22, 2018 respectively. The performance taken up. For this, two more pressure tubes i.e. L-12
of units with respect to nuclear, radiological and and P-09 were also cut & removed. Leaks from end
industrial safety had been satisfactory before and shield were rectified by installing special seal plugs on
after the EMCCR campaign. The results of In-Service Calandria Side Tube Sheet (CSTS) of north end shield.
Inspections (ISI) were found to be satisfactory and Present leak rate from end shield is ~130 ml/hour.
plant is capable for safe operation for next five years. Fitness for service of end shield (north) and coolant
Radioactive effluent discharges remained well below channels is being assessed.
the limits specified in technical specification. Effective
dose to a member of public residing at exclusion zone (v) Continuous Operation of Kaiga Generating
was well within the limit prescribed by AERB (Refer Station (KGS) Unit-1
chapter 4 of this report). Station has a well-established KGS-1 was synchronized to grid on May 13, 2016
program for utilization of operating experience and after completion of Biennial Shutdown (BSD) activities.
had implemented a number of safety modifications After completion of 962 days of continuous operation,
based on this programme. Station had implemented all the unit was shut down for BSD activities on December
short & medium term safety upgrades identified based 31, 2018. During shutdown, surveillances of safety
on review of Fukushima NPP accident. Long term and safety related Structure, System, and Components
post Fukushima safety upgrades such as installation (SSC) were carried out in ‘as is condition’. The results
of PAHMS & CFVS and establishment of OESC are of these surveillances were found to be satisfactory. The
expected to be completed by next Biennial Shutdowns data obtained on performance of plant SSCs would
(BSD) of units. be useful w.r.t. long term operation of the NPPs. After
(iii) Kudankulam Nuclear Power Plant completion of BSD activities, KGS-1 was synchronized
(KKNPP)-1&2 to grid on February 21, 2019.

AERB had earlier renewed the licence for operation
for a limited period i.e. up to March 10, 2019, due
to pending completion of the review of fatal accident
occurred in October 2018 at KKNPP site. Subsequently,
station submitted significant event report and compliance
to AERB recommendations made during review of the
accident along with request for renewal of the licence.
AERB review indicated that station management had
taken necessary steps for improvements in safety
management and had committed to demonstrate the
improvements through improved safety performance. In
view of the above, licence for operation of KKNPP-1&2
under the Factories Act, 1948 was renewed up to July Kaiga Generating Station
31, 2020.

(iv) Madras Atomic Power Station (MAPS-1&2) (vi) Periodic Safety Review (PSR) of KKNPP-1&2
and RAPS-5&6
MAPS-1 is shut down since January 30, 2018. The
coolant channels O-09 & Q-09, which were observed to The licences for operation of KKNPP-1&2 and
have developed leak, were cut & removed from reactor RAPS-5&6 are valid up to July 31, 2020 and March
core and transported to BARC for Post Irradiation 31, 2020 respectively. As per the revised draft AERB
Examination (PIE). PIE of these pressure tubes has been guide on ‘PSR for NPPs’ (AERB/SG/NPP/O-12), the
completed and the reports are under review in NPCIL. utility is required to submit PSR basis document before
Inspection of large number of coolant channels was embarking on PSR activity. The basis documents
undertaken to assess their healthiness. The review of received from both stations were reviewed and accepted.
findings is being carried out by NPCIL.

AERB Annual Report 2019 13