Fitch Ratings has assigned Korea Southern Power Co., Ltd.'s (KOSPO, AA-/Stable) proposed US dollar senior unsecured notes a rating of 'AA-'.

KOSPO will use the net proceeds from the proposed notes for general corporate purposes, including refinancing of existing debt and capacity expansion. The proposed notes are rated at the same level as KOSPO's senior unsecured rating, as they represent its direct, unconditional, unsecured and unsubordinated obligations.

We equalise KOSPO's Issuer Default Rating with that of its parent, Korea Electric Power Corporation (KEPCO, AA-/Stable), based on our assessment of 'Weak' legal, 'High' strategic and 'High' operational incentives for KEPCO to provide support to KOSPO. This is based on the 'strong parent, weak subsidiary' approach under Fitch's Parent and Subsidiary Linkage Rating Criteria.

Key Rating Drivers

'High' Operational Incentive to Support: The level of integration between KOSPO and KEPCO is 'High', similar to the other generation companies (gencos) KEPCO owns. KEPCO is the only off-taker of electricity. The integration is further supported by the adjusted coefficient in the wholesale tariff formula, which serves to adjust profit sharing between KEPCO and its six wholly owned gencos.

KOSPO's operations and financials are closely supervised by the Korean government through KEPCO. Its annual mid- to long-term financial plan submitted to the government includes financial and operational targets and investment plans, and is in line with KEPCO's plans. The capex plans of KOSPO and KEPCO are also based on the government's Basic Plan for Long-Term Electricity Supply and Demand, established every two years. We therefore assess the management and brand overlap of KOSPO and KEPCO as 'High'.

'High' Strategic Incentive to Support: We believe KOSPO is integral to KEPCO's power generation capability. The five non-nuclear gencos, which have similar size and importance, together account for nearly two-thirds of KEPCO's capacity, with KOSPO contributing 13.8% to KEPCO's generation capacity as of end-June 2023.

Largest Share of LNG: KOSPO's capacity was 11,481 megawatts (MW) at end-June 2023. Its coal-fired units had capacity of 6,044MW, and its liquefied natural gas (LNG)-fired units 5,061MW. It also has some renewable energy generation. KOSPO has the largest share of LNG generation among the five gencos and therefore the highest unit selling price.

Tight Environmental Restrictions: The government continues to promote LNG and renewable energy as part of efforts to reduce carbon emissions and air pollution as well as cut the country's reliance on coal power. We believe such policies will support KOSPO's revenue growth compared with other gencos, which were negatively affected by lower utilisation of coal-fired plants, as the company has the highest LNG share in its capacity.

Higher Capex: KOSPO's capex is likely to stay elevated with the continued construction of a new LNG plant in Shin-Sejong, increase in capex for replacing coal-fired plants in Hadong and Andong with LNG plants, and increasing investments in renewable energy and overseas expansion. We forecast the capex intensity ratio to increase to the early teens in the short term from high single digits in previous years.

Standalone Credit Profile of 'bbb-': Our assessment of KOSPO's Standalone Credit Profile considers the deterioration in its EBITDA net leverage in 2022 to 7.3x, due to a minimum level of adjusted coefficient and higher environmental charges, resulting in operating profit of KRW56 billion, equivalent to a 0.1% operating margin. In 2023, we forecast KOSPO's profitability to improve to a low single-digit EBIT margin, given stabilising energy prices. However, increased capex will continue to put pressure on its balance sheet and we assume KOSPO's EBITDA net leverage will hover at 6x-7x over the medium term.

Derivation Summary

Our assessment of KOSPO's ratings is comparable with that of Korea East-West Power Co., Ltd. (EWP, AA-/Stable), whose ratings are also equalised with those of parent KEPCO under Fitch's Parent and Subsidiary Linkage Rating Criteria.

Key Assumptions

Fitch's Key Assumptions Within Our Rating Case for the Issuer

Revenue to fall by more than 10% in 2023 on lower system marginal price

EBIT margin to recover to 1%-2% on upward revision of the pricing formula's adjustment coefficient, which was kept at the minimum level in 2022, and lower fuel costs

Capex of KRW850 billion-950 billion annually in 2023-2024

40% of net income to be paid as dividends in 2023

RATING SENSITIVITIES

KOSPO's ratings are equalised with those of KEPCO.

Factors that could, individually or collectively, lead to positive rating action/upgrade:

Positive rating action on KEPCO, provided that KEPCO's incentive to support KOSPO remains intact

Factors that could, individually or collectively, lead to negative rating action/downgrade:

Negative rating action on KEPCO

Lower incentive from KEPCO to support KOSPO

For KEPCO, the following sensitivities were outlined by Fitch in its Rating Action Commentary of 19 June 2023:

Factors that could, individually or collectively, lead to positive rating action/upgrade:

Positive rating action on the Korean sovereign (AA-/Stable), provided the likelihood of sovereign support remains intact

Factors that could, individually or collectively, lead to negative rating action/downgrade:

Negative rating action on the sovereign

Weakening in the likelihood of the sovereign's support for KEPCO

Best/Worst Case Rating Scenario

International scale credit ratings of Non-Financial Corporate issuers have a best-case rating upgrade scenario (defined as the 99th percentile of rating transitions, measured in a positive direction) of three notches over a three-year rating horizon; and a worst-case rating downgrade scenario (defined as the 99th percentile of rating transitions, measured in a negative direction) of four notches over three years. The complete span of best- and worst-case scenario credit ratings for all rating categories ranges from 'AAA' to 'D'. Best- and worst-case scenario credit ratings are based on historical performance. For more information about the methodology used to determine sector-specific best- and worst-case scenario credit ratings, visit https://www.fitchratings.com/site/re/10111579.

Liquidity and Debt Structure

Adequate Liquidity: KOSPO's cash and cash equivalents and short-term investments stood at KRW133 billion at end-June 2023, which only partly covered its short-term obligations of KRW1,497 billion. However, we believe liquidity is manageable in light of the company's ready access to Korea's specialty bond market, global capital markets and well-spread-out maturity profile.

Issuer Profile

KOSPO is one of six power-generation companies wholly owned by KEPCO. As of end-March 2023, it had installed capacity of 11,481MW, accounting for 13.8% of KEPCO's total capacity and 7.6% of Korea's total capacity.

Date of Relevant Committee

16 June 2023

REFERENCES FOR SUBSTANTIALLY MATERIAL SOURCE CITED AS KEY DRIVER OF RATING

The principal sources of information used in the analysis are described in the Applicable Criteria.

ESG Considerations

The highest level of ESG credit relevance is a score of '3', unless otherwise disclosed in this section. A score of '3' means ESG issues are credit-neutral or have only a minimal credit impact on the entity, either due to their nature or the way in which they are being managed by the entity. Fitch's ESG Relevance Scores are not inputs in the rating process; they are an observation on the relevance and materiality of ESG factors in the rating decision. For more information on Fitch's ESG Relevance Scores, visit www.fitchratings.com/topics/esg/products#esg-relevance-scores

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