atw 2018-05v6


atw Vol. 63 (2018) | Issue 5 ı May


Neckarwestheim II


Operating sequence in 2017











Electrical output in %

January February March April May June July August September October November December

During the reporting year 2017 the Neckarwestheim II nuclear power

plant (GKN II) generated a gross output of 10,540,800 MWh. The net

electrical energy generation amounted 9,880,271 MWh of which

8,805,281 MWh were fed into the public three-phase supply and

1,074,990 MWh into the static conversion unit of the Deutsche

Bahn AG. The plant was 7,791 h on the grid. This corresponds to an

availability of 88.93 %. Since the commissioning of the three-phasemachine

320,126,484 MWh gross and 299,316,779 MWh net were


Planned shutdowns

100 7 to 20 April: 33 rd refuelling.

1 to 28 September: 34 th Refuelling and annual revision.


Unplanned shutdowns and reactor/turbine trip

None. 60



reductions above 10 % and longer than for 24 h

20. February to 7. April and 9. August to 1. September:


Strech-out operation.

23. to 26. and 31. December: Load sequence operation.


Safety reviews

The RSK and EU stress tests carried out after Fukushima confirm the

very high safety level of German nuclear power plants. German

power Positionierung:

plants – including decommissioned plants – dispose at

all stress test assumed scenarios about large safety margins

Bezug, links, unten

which exceed the minimum requirements stated in legislations,

authorisations and policies and which contain already in their

interpretation as well in their actual state high reserves against

X = 20,475 Y = 95,25 B = 173,5 H = 38,2

VGB: HKS6K 30 %




100 60





flood and earthquakes. Robustness

increasing measures are being further developed within the national

action plan. In Baden Württemberg, the recommendations of the

national action plan are incorporated in the so-called “Action plan

Baden-Württemberg. The tasks are, with the exception of a few

single factors of the plant- specific robustness analysis, completed.

Furthermore the plant GKN II is mirrored in the framework of the

so-called extend safety test Baden-Württemberg with regards to

incident management at the new nuclear rules and regulations – the

safety requirements at nuclear power plants (SiAnf). The focus is set

on the relevant tank incidents of the remaining operation.

Integrated management system (IMS)


The integrated management system (IMS) of the EnBW Kernkraft

GmbH (EnKK) with its partial system for nuclear safety (SMS),

quality management (QMS/QSÜ) as well as environmental and

energy management (UMS, EnMS) were also in 2017 continuously

further developed. Scope and content of each process descriptions

were gradually adapted to the different internal requirements and

related approval criteria. Besides the confirmation of conformity for

the IMS, the certification extension of the EnKK energy management

systems (EnMS) according to DIN, EN ISO 50001 followed for the

improvement of the energetic efficiency 2017.

The completeness and effectiveness of measurements as well as

the quality management status (QSÜ) were confirmed by respective

internal audits with multi-day on-site inspections by experts ( KeTAG)

and the supervisory authority at all three of the EnKK. The modular

design of the process oriented IMS according to KTA 1402 enables

also in the upcoming years a continuous and efficient adaptation to

the site-specific requirements of the post-operation phase/remaining

operations/ dismantling.

A WANO Corporate Peer Review was carried out for EnKK in

2017, where an international team especially examined the issues

„ corporate leadership“ and „independent oversight“.

From 10 to 28 July a WANO Peer Review took place at the plant

GKN II. A team of 30 persons from 13 nations examined the

implementation of defined performance objectives and criteria

inside the plant. The plant GKN II and its operating team is one of

the “best performers” on an international comparison.

Waste management status

In the year 2017 5 TN 24 E-casks and 4 CASTOR © V/19 casks

from GKN II were delivered to the on-site intermediate storage

Neckarswestheim. Furthermore 15 CASTOR © 440/84 mvK-casks

were delivered in 5 transfers from the nuclear power plant Obrigheim

and stored. Thus by then End of 2017 57 loaded CASTOR ©

V/19-casks, 5 loaded TN 24E-casks and 15 loaded CASTOR © 440/84

mvK-casks were stored at the on-site intermediate storage



Operating results 2017 – Part I*

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